CN109202077A - A kind of 3D printing method - Google Patents
A kind of 3D printing method Download PDFInfo
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- CN109202077A CN109202077A CN201811007873.XA CN201811007873A CN109202077A CN 109202077 A CN109202077 A CN 109202077A CN 201811007873 A CN201811007873 A CN 201811007873A CN 109202077 A CN109202077 A CN 109202077A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/50—Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/10—Auxiliary heating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/10—Auxiliary heating means
- B22F12/17—Auxiliary heating means to heat the build chamber or platform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/40—Radiation means
- B22F12/44—Radiation means characterised by the configuration of the radiation means
- B22F12/45—Two or more
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/66—Treatment of workpieces or articles after build-up by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/226—Driving means for rotary motion
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Automation & Control Theory (AREA)
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- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of 3D printing methods, comprising: step a: providing a liftable print platform；Step b: control print platform declines the first preset distance value, and metallic print powder is spread on print platform；Step c: control first laser head has the laser of the first predetermined power value to melt metallic print powder towards the metallic print powder transmitting on print platform, to form printing objects；Step d: control second laser headring is rotated around printing objects, and the edge-emission for controlling second laser head towards the printing objects on print platform simultaneously has the laser of the second predetermined power value to eliminate the particle at the edge of printing objects, the wavelength of laser corresponding to the first predetermined power value is shorter than the wavelength of laser corresponding to the second predetermined power value.By the above-mentioned means, the particle at the edge of each layer of printing objects is eliminated when the present invention by forming one layer of printing objects every time on print platform, so that the outer surface of printing objects is not coarse, good hand touch.
Description
Technical field
The present invention relates to 3D printing technique fields, more particularly to a kind of 3D printing method.
Background technique
3D printing is one kind of rapid shaping technique, is one kind based on digital document, uses powder or curable
Material manufactures the technology of product by layer-by-layer printing, with traditional manufacture use subtract material manufacturing technology formed it is fresh
Bright comparison, 3D printing are a kind of increases material manufacturing technologies, are to form final product by the superposition of material from level to level.
Currently, the outer surface of the printing objects printed on the market by 3D printing method is coarse, or even there are
Particle point, the feel that people holds are very poor.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of 3D printing methods, by the printing powder of print platform
When forming one layer of printing objects every time, the particle at the edge of each layer of printing objects is eliminated, so that printing objects
Outer surface is not coarse, greatly improves the experience of user.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of 3D printing method is provided, is wrapped
It includes: step a: providing a liftable print platform；Step b: control print platform declines the first preset distance value, and is beating
Metallic print powder is spread on print platform；Step c: control first laser head has the towards the metallic print powder transmitting on print platform
The laser of one predetermined power value is to melt the metallic print powder, to form printing objects；Step d: control second laser headring
It is rotated around printing objects, and the edge-emission for controlling second laser head towards the printing objects on print platform simultaneously is pre- with second
Surely the laser of magnitude is to eliminate the particle at the edge of printing objects, wherein the wave of laser corresponding to the first predetermined power value
Length is shorter than the wavelength of laser corresponding to the second predetermined power value.
Wherein, 3D printing method further include: step e: control print platform declines the second preset distance value, and flat in printing
It is then covered with ceramic powder on the printing objects spread on platform, wherein the second preset distance value is smaller than the first preset distance value；Step f:
Control second laser head has the laser of third predetermined power value to melt ceramic powder towards the ceramic powder transmitting on print platform
On printing objects, wherein the wavelength of laser corresponding to the first predetermined power value is than laser corresponding to third predetermined power value
Wavelength it is short；Step g: control first laser head is towards between the metallic print powder and ceramic powder of the printing objects on print platform
Junction transmitting has the laser of the first predetermined power value to melt ceramic powder and metallic print powder mutually；Continue to execute step
b。
Wherein, metallic print powder includes blowing agent powder, this method further include: to including metallic print powder, foaming agent
The printing objects of powder and ceramic powder are heated, to evaporate the intracorporal blowing agent powder of printed matter.
Wherein, metallic print powder includes the first metallic print powder and the second metallic print powder, and print platform includes first dozen
Region and the second print area are printed, wherein control print platform declines the first preset distance value, and spreads gold on print platform
The step of belonging to printing powder includes: the first print area the first preset distance value of decline for controlling print platform, and it is flat to control printing
Second print area of platform declines third preset distance value；The first metallic print is spread on the first print area of print platform
Powder, and the second metallic print powder is spread on the second print area of print platform, wherein the first metallic print powder and the second gold medal
The material for belonging to printing powder is different, and the particle diameter of the first metallic print powder and the second metallic print powder is different, the pre- spacing of third
It is different with the first preset distance value from being worth.
Wherein, control first laser head has swashing for the first predetermined power value towards the metallic print powder transmitting on print platform
Light includes: to control first laser head towards the first gold medal on the first print area of print platform the step of metallic print powder to melt
Belonging to printing powder transmitting has the laser of the first predetermined power value to melt the first metallic print powder；Second laser head is controlled towards printing
The second metallic print powder transmitting on second print area of platform has the laser of the 4th predetermined power value to melt the second gold medal
Belong to printing powder, wherein the wave of laser corresponding to the wavelength of laser corresponding to the first predetermined power value and the 4th predetermined power value
Length is not identical.
It wherein, include tungsten metal powder in metallic print powder.
It wherein, include antioxidant powder and active powdered carbon in metallic print powder.
Wherein, metallic print powder is copper alloy material feed powder, and first laser head and second laser head are equipped with sharp for blocking
The protection eyeglass of light reflection.
Wherein, it is provided with and heats the substrate on print platform, printing objects are on heating the substrate, this method further include: printing
It after forming objects, is heated to heating the substrate, to heat the molding printing objects on print platform；To molding printing
Object carries out sandblasting.
Wherein, it is provided with and heats the substrate on print platform, metallic print powder is arranged on heating the substrate, and metallic print powder is
Bronze powder, this method further include: have first towards the metallic print powder transmitting on print platform executing control first laser head
When step of the laser of predetermined power value to melt metallic print powder, heating the substrate on print platform is heated.
The beneficial effects of the present invention are: being in contrast to the prior art, 3D printing method disclosed in this invention includes:
Step a: a liftable print platform is provided；Step b: control print platform declines the first preset distance value, and is printing
Metallic print powder is spread on platform；Step c: control first laser head has first towards the metallic print powder transmitting on print platform
The laser of predetermined power value is to melt the metallic print powder, to form printing objects；Step d: control second laser headring around
Printing objects rotation, and the edge-emission for controlling second laser head towards the printing objects on print platform simultaneously has second to make a reservation for
The laser of energy value is to eliminate the particle at the edge of printing objects, wherein the wavelength of laser corresponding to the first predetermined power value
Wavelength than laser corresponding to the second predetermined power value is short.By the above-mentioned means, 3D printing method disclosed in this invention is logical
Cross when forming one layer of printing objects every time on the printing powder of print platform, to the particle at the edges of each layer of printing objects into
Row is eliminated, so that the outer surface of printing objects is not coarse, greatly improves the experience of user.
Detailed description of the invention
Fig. 1 is the flow diagram of 3D printing method of the present invention；
Fig. 2 is the partial structural diagram of an embodiment of 3D printer of the present invention.
Specific embodiment
As shown in Figure 1, Fig. 1 is the flow diagram of 3D printing method of the present invention.The 3D printing method the following steps are included:
Step a: a liftable print platform is provided.
Step b: control print platform declines the first preset distance value, and metallic print powder is spread on print platform.
It should be understood that the first preset distance value is setting value, can be arranged on a printer according to actual needs.
It is worth noting that, as shown in Fig. 2, in some embodiments, metallic print powder include the first metallic print powder and
Second metallic print powder, print platform include the first print area 10 and the second print area 11.Wherein control under print platform
First preset distance value drops, and the step b for spreading on print platform metallic print powder includes:
Step b1: the first print area 10 for controlling print platform declines the first preset distance value, and controls print platform
The second print area 11 decline third preset distance value.It should be understood that third preset distance value is setting value, it can be according to practical need
To be arranged on a printer.
Step b2: the first metallic print powder is spread on the first print area 10 of print platform, and in print platform
The second metallic print powder is spread on second print area 11.
It should be understood that spreading different metallic print powder, energy respectively on the first print area 10 and the second print area 11
Enough printing objects include metal material of different nature.
Preferably, the material of the first metallic print powder and the second metallic print powder is different, and the first metallic print powder and the
The particle diameter of two metallic print powder is different, and third preset distance value is different with the first preset distance value.Preferably, the first metal
The diameter for printing powder is smaller than the particle diameter of the second metallic print powder, and third preset distance value is bigger than the first preset distance value.
Step c: control first laser head 12 has the first predetermined power value towards the metallic print powder transmitting on print platform
Laser to melt metallic print powder, to form printing objects.
It should be understood that forming one layer of printing objects in step c.
It is worth noting that, in some embodiments, controlling first laser head 12 towards the metallic print powder on print platform
Emit the laser with the first predetermined power value includes: with the step c for melting metallic print powder
Step c1: control first laser head 12 is sent out towards the first metallic print powder on the first print area 10 of print platform
The laser with the first predetermined power value is penetrated to melt the first metallic print powder.
Step c2: control second laser head 13 is sent out towards the second metallic print powder on the second print area 11 of print platform
The laser with the 4th predetermined power value is penetrated to melt the second metallic print powder.
It should be understood that melting by 12 pair of first metallic print powder of first laser head, pass through 13 pair of second laser head
Two metallic print powder are melted, this layer of printing objects are had, and there are two types of metal materials of different nature.
Further, laser corresponding to the wavelength of laser corresponding to the first predetermined power value and the 4th predetermined power value
Wavelength it is not identical.And since the diameter of the first metallic print powder is smaller than the particle diameter of the second metallic print powder, and third is pre-
Set a distance value is bigger than the first preset distance value, therefore the laser that second laser head needs launch energy magnitude bigger could all melt
Change the second metallic print powder of the second print area 11, then the wavelength of laser corresponding to the first predetermined power value is more predetermined than the 4th
The wavelength of laser corresponding to energy value is long.
Step d: control second laser head 13 is rotated around printing objects, and it is flat towards printing to control second laser head 13 simultaneously
The edge-emission of printing objects on platform has the laser of the second predetermined power value to eliminate the particle at the edge of printing objects.
It should be understood that the laser head of the present embodiment includes first laser head 12 and second laser head 13, wherein first laser
First 12 and second laser head 13 be rotatable setting.
Significantly, since first laser head 12 is that transmitting laser is carried out to metallic print powder, therefore printing objects
It also is metal, and in laser melting metallic print powder, the edge of printing objects will appear some particles, lead to printing objects
Edge roughness, therefore eliminated, enabled to using the particle or sundries at the edge of 13 pairs of printing objects of second laser head
The surface at the edge of printing objects is not coarse or even smooth, and feeling is better.That is, this implementation can be in print platform
When one layer of printing objects of upper formation every time, the particle at the edge of each layer of printing objects is eliminated, so that after molding
The surface of printing objects is not coarse, good hand touch.
In the present embodiment, particle needs the lesser laser of energy ratio that can eliminate, therefore the first predetermined power value institute is right
The wavelength for the laser answered is shorter than the wavelength of laser corresponding to the second predetermined power value.
Step e: control print platform declines the second preset distance value, and is then covered on the printing objects on print platform
Ceramic powder.It should be understood that the second preset distance value is setting value, can be arranged on a printer according to actual needs.
It should be understood that can control the first print area 10 and/or the second print area 11 of print platform in step e
Decline, and the second preset distance value is smaller than the first preset distance value.Preferably, the value range of the second preset distance value is 10-
15um (micron).And the value range of the first preset distance value is 30-40um.
Step f: control second laser head 13 has swashing for third predetermined power value towards the ceramic powder transmitting on print platform
Light is ceramic powder to be melted on printing objects.
It should be understood that the present embodiment is by the way that ceramic powder to be melted on printing objects, so that the weight of printing objects is lighter.By
It is smaller than the first preset distance value in the second preset distance value, therefore look like connection between the printing objects of adjacent metal
, therefore printing objects after molding are hardly visible ceramics layer.That is, metallic print powder includes ceramics
Powder so that printing objects after molding have the characteristics that it is harder while also relatively light.
In the present embodiment, ceramic powder needs the lesser laser of energy ratio i.e. fusible, therefore the first predetermined power value institute
The wavelength of corresponding laser is shorter than the wavelength of laser corresponding to third predetermined power value.
Step g: control first laser head 12 is towards between the metallic print powder and ceramic powder of the printing objects on print platform
Junction transmitting have the first predetermined power value laser ceramic powder and metallic print powder to be melted mutually.
It should be understood that the fusing point of ceramic powder is relatively low, therefore ceramic powder needs the lesser laser of energy ratio i.e. fusible, and golden
Belonging to printing powder, to be required to biggish laser just fusible, therefore second laser head 13 has third in advance surely towards ceramic powder transmitting
The laser of magnitude can only molten ceramic powder, metallic print powder cannot be melted comprehensively, therefore in step g, pass through first laser head
12 towards the junction transmitting between metallic print powder and ceramic powder there is the laser of the first predetermined power value to enable to ceramic powder
It is all melted with metallic print powder, but also ceramic powder and metallic print powder melt mutually and are mixed to form one, connection is more
Stablize.
In addition, in some embodiments, after executing the step g, the 3D printing method further include: control second laser head
13 around including the printing objects rotation of metallic print powder and ceramic powder, and controls second laser head simultaneously towards on print platform
It include that the edge-emission of the printing objects of metallic print powder and ceramic powder has the laser of the second predetermined power value to eliminate
It include the particle at the edge of the printing objects of metallic print powder and ceramic powder.
It should be understood that continue to execute step b after executing the step g, circuits sequentially operation and can be realized and print molding
Printing objects.
It should be understood that the metallic print powder of the present embodiment includes blowing agent powder, therefore after step g, the 3D printing side
Method further include: the printing objects for including metallic print powder, blowing agent powder and ceramic powder are heated, to evaporate printing objects
Interior blowing agent powder.It should be understood that first laser head 12 towards the metallic print powder transmitting on print platform have first it is pre- surely
Some blowing agent powders have just been evaporated when the laser of magnitude is to melt metallic print powder, but not evaporating completely light, therefore need
The printing objects for including metallic print powder, blowing agent powder and ceramic powder are heated again, enable blowing agent powder
It evaporates again, so that the weight of printing objects.Moreover, it is noted that during heating evaporation, blowing agent powder shape
It is evaporated from printing objects after molding at gas, i.e., blowing agent powder, which forms gas, can penetrate the molding printing of metal powder
Object evaporation.
It in the present embodiment, include tungsten metal powder in metallic print powder, i.e. the first metallic print powder and/or the second metal
Print powder include tungsten metal powder so that printing objects after molding have the characteristics that it is harder.
Further, in the present embodiment, include antioxidant powder in metallic print powder, i.e. the first metallic print powder and/
Or second metallic print powder include antioxidant powder so that printing objects after molding have anti-oxidation function, it is not easy to get rusty,
Long service life.Further, since printing powder itself has peculiar smell, printing objects printed itself are also to have
Peculiar smell, therefore also include active powdered carbon in the metallic print powder of the present embodiment, i.e. the first metallic print powder and/or the second gold medal
Belonging to printing powder includes active powdered carbon, so that printing objects after molding have adsorption function, has the function of to eliminate the unusual smell, so that beating
It prints object and does not have peculiar smell.
In addition, in some embodiments, metallic print powder is copper alloy material feed powder, and due to Cu alloy material reflectivity
Height, energy absorption efficiency is low, and the laser of reflection may generate optical device (including first laser head and second laser head)
Injury, therefore in order to be protected to optical device, it is preferable that first laser head and second laser head are equipped with sharp for blocking
The protection eyeglass of light reflection.Further, it is provided with and heats the substrate on print platform, printing objects are on heating the substrate, the 3D
Method further include: step h: after printing objects molding, heating to heating the substrate, molding on print platform to heat
Printing objects；Step i: sandblasting is carried out to molding printing objects.It should be understood that there is more tight for copper alloy molding printing objects
The viscous powder phenomenon of weight, and heated by heating the substrate, preheating powder is carried out using heating the substrate, and carry out to printing objects
Sandblasting, so that the surface of printing objects is smooth.It is right when due to forming one layer of printing objects every time on the printing powder of print platform
The particle at the edge of each layer of printing objects is eliminated so that the outer surface of printing objects is not coarse, and this implementation also into
One step is by carrying out sandblasting to printing objects, so that the surface of printing objects is more smooth, holds that feeling is better.
In addition, in some embodiments, being provided with and heating the substrate on print platform, the setting of metallic print powder is being heated the substrate
On.Further, metallic print powder is bronze powder, this method further include: is executing control first laser head towards on print platform
Metallic print powder transmitting when there is step of the laser to melt metallic print powder of the first predetermined power value, on print platform
Heat the substrate and heated so that the tin element in print procedure medium bronze powder will not be segregated, greatly improve service life.
It should be understood that heating in print procedure to bronze powder, the tin element of bronze powder is enabled to be uniformly distributed, so that printing
The tin element of bronze powder will not be segregated in the process.
To sum up, 3D printing method disclosed in this invention includes: step a: providing a liftable print platform；Step
B: control print platform declines the first preset distance value, and metallic print powder is spread on print platform；Step c: control first
Laser head has the laser of the first predetermined power value to melt the metallic print towards the metallic print powder transmitting on print platform
Powder, to form printing objects；Step d: control second laser headring is rotated around printing objects, and controls second laser head court simultaneously
The edge-emission of printing objects on print platform has the laser of the second predetermined power value to eliminate at the edge of printing objects
Particle, wherein wavelength of the wavelength of laser corresponding to the first predetermined power value than laser corresponding to the second predetermined power value
It is short.By the above-mentioned means, 3D printing method disclosed in this invention by forming one layer every time on the printing powder of print platform
When printing objects, the particle at the edge of each layer of printing objects is eliminated, so that the outer surface of printing objects is not coarse,
Greatly improve the experience of user.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of 3D printing method characterized by comprising
Step a: a liftable print platform is provided；
Step b: it controls the print platform and declines the first preset distance value, and spread metallic print on the print platform
Powder；
Step c: control first laser head has the first predetermined power towards the metallic print powder transmitting on the print platform
The laser of value is to melt the metallic print powder, to form printing objects；
Step d: control second laser headring is rotated around the printing objects, and is controlled the second laser head simultaneously and beaten towards described
The edge-emission for printing the printing objects on platform has the laser of the second predetermined power value to eliminate in the printing objects
Edge particle, wherein the wavelength of laser corresponding to the first predetermined power value is more right than the second predetermined power value institute
The wavelength for the laser answered is short.
2. 3D printing method according to claim 1, which is characterized in that the 3D printing method further include:
Step e: it controls the print platform and declines the second preset distance value, and the printing objects on the print platform
On be then covered with ceramic powder, wherein the second preset distance value is smaller than the first preset distance value；
Step f: controlling the second laser head towards the ceramic powder transmitting on the print platform has third predetermined power
The laser of value is the ceramic powder to be melted on the printing objects, wherein laser corresponding to the first predetermined power value
Wavelength it is shorter than the wavelength of laser corresponding to the third predetermined power value；
Step g: control the first laser head towards the printing objects on the print platform metallic print powder and ceramics
Junction transmitting between powder has the laser of the first predetermined power value with the ceramic powder and the metallic print powder is mutual
Fusing；
Continue to execute step b.
3. 3D printing method according to claim 2, which is characterized in that the metallic print powder includes blowing agent powder,
The method also includes:
The printing objects for including the metallic print powder, the blowing agent powder and the ceramic powder are heated, with
Evaporate the intracorporal blowing agent powder of the printed matter.
4. 3D printing method according to claim 1, which is characterized in that the metallic print powder includes the first metallic print
Powder and the second metallic print powder, the print platform includes the first print area and the second print area, wherein control institute
It states print platform and declines the first preset distance value, and include: the step of spreading metallic print powder on the print platform
The first print area for controlling the print platform declines the first preset distance value, and controls the print platform
Second print area declines the third preset distance value；
The first metallic print powder is spread on the first print area of the print platform, and the of the print platform
The second metallic print powder is spread on two print areas, wherein the material of the first metallic print powder and the second metallic print powder
Material is different, and the first metallic print powder is different with the particle diameter of the second metallic print powder, the pre- spacing of third
It is different with the first preset distance value from being worth.
5. 3D printing method according to claim 4, which is characterized in that the control first laser head is flat towards the printing
Metallic print powder transmitting on platform has the step of laser of the first predetermined power value is to melt metallic print powder packet
It includes:
The first laser head is controlled towards the first metallic print powder transmitting on the first print area of the print platform
Laser with the first predetermined power value is to melt the first metallic print powder；
The second laser head is controlled towards the second metallic print powder transmitting on the second print area of the print platform
Laser with the 4th predetermined power value is to melt the second metallic print powder, wherein the first predetermined power value institute
The wavelength of corresponding laser is not identical as the wavelength of laser corresponding to the 4th predetermined power value.
6. 3D printing method according to claim 3, which is characterized in that include tungsten metal in the metallic print powder
Powder.
7. 3D printing method according to claim 6, which is characterized in that include antioxidant powder in the metallic print powder
With active powdered carbon.
8. 3D printing method according to claim 1, which is characterized in that the metallic print powder is copper alloy material feed powder,
The first laser head and the second laser head are equipped with the protection eyeglass for blocking laser reflection.
9. 3D printing method according to claim 8, which is characterized in that it is provided with and heats the substrate on the print platform,
The printing objects are on described heat the substrate, this method further include:
After the printing objects molding, heated to heating the substrate, to heat the molding printing on print platform
Object；
Sandblasting is carried out to the molding printing objects.
10. 3D printing method according to claim 1, which is characterized in that it is provided with and heats the substrate on the print platform,
The metallic print powder is arranged on described heat the substrate, and the metallic print powder is bronze powder, this method further include:
Have first to make a reservation for towards the metallic print powder transmitting on the print platform executing the control first laser head
When step of the laser of energy value to melt the metallic print powder, heating the substrate on the print platform is heated.
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