CN111230308B - 3D printing model laser polishing system and using method thereof - Google Patents
3D printing model laser polishing system and using method thereof Download PDFInfo
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- CN111230308B CN111230308B CN202010092096.4A CN202010092096A CN111230308B CN 111230308 B CN111230308 B CN 111230308B CN 202010092096 A CN202010092096 A CN 202010092096A CN 111230308 B CN111230308 B CN 111230308B
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- 238000005498 polishing Methods 0.000 title claims abstract description 102
- 238000010146 3D printing Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 93
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 238000000746 purification Methods 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 7
- 238000007639 printing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 35
- 239000000956 alloy Substances 0.000 claims description 31
- 229910045601 alloy Inorganic materials 0.000 claims description 31
- 239000011521 glass Substances 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000007517 polishing process Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/3568—Modifying rugosity
- B23K26/3576—Diminishing rugosity, e.g. grinding; Polishing; Smoothing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
- B23K26/0853—Devices involving movement of the workpiece in at least in two axial directions, e.g. in a plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Engineering & Computer Science (AREA)
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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
Abstract
A3D printing model laser polishing system and a using method thereof, the system comprises a main body frame, and a laser translation device, a Z-direction displacement component, a surface cleaning device, a gas purification device, a control device and a power supply device which are arranged on the main body frame, wherein a model rotation device is arranged on the Z-direction displacement component; the use method utilizes the ultraviolet laser beam to carry out uniform polishing and local polishing on the surface of the 3D printing model, and purifies dust and harmful gas generated in the polishing process in real time, thereby effectively reducing the thermal deformation and mechanical deformation of the 3D printing model and realizing fine processing.
Description
Technical Field
The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing model laser polishing system and a using method thereof.
Background
3D printing is a rapid prototyping technology for building a 3D model based on a two-dimensional prototyping method, and a stepped layer pattern is inevitably formed on the surface of the 3D printing model due to the influence of a layering printing and overlaying prototyping process. Printing the lamination makes the appearance of the 3D model rough, and has great influence on the surface precision of the model. The 3D printing model is processed by utilizing a traditional sand paper polishing method and a traditional soil filling method, the polishing precision is difficult to guarantee, and the workload is large. The Chinese patent CN209140590U fixes the 3D printing model on the grid plate, then immerses the grid plate into a polishing solution cylinder for polishing, and uses a drying fan to blow and dry. Chinese patent CN208051704U utilizes the atomizer to atomize the polishing solution, so that the polishing solution can be uniformly attached to the surface of the 3D printing model, and the polishing difficulty of the 3D printing model is reduced. The Chinese patent CN209140590U and the Chinese patent CN208051704U are polished by a chemical method, and the relation between the time length of immersing the 3D model into the polishing solution and the polishing amount is difficult to control. Chinese patent CN208035398U adopts a heating method to melt the surface of the 3D model to be processed in a heating polishing chamber to eliminate the striations of the model, so as to obtain a smoother surface, but this method is easy to cause thermal deformation of the 3D printed model.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a 3D printing model laser polishing system and a using method thereof, which can uniformly polish and locally polish the surface of a 3D printing model by using an ultraviolet laser beam, purify dust and harmful gas generated in the polishing process in real time, effectively reduce the thermal deformation and mechanical deformation of the 3D printing model, and realize fine processing.
In order to achieve the purpose, the invention adopts the technical scheme that:
A3D printing model laser polishing system comprises a main body frame 1, and a laser translation device 2, a Z-direction displacement assembly 4, a surface cleaning device 5, a gas purification device 6, a control device 7 and a power supply device 8 which are arranged on the main body frame 1, wherein a model rotation device 3 is arranged on the Z-direction displacement assembly 4;
the main body frame 1 comprises a frame body formed by connecting a bottom plate 12, a vertical plate 15, upright posts 17, a top plate 14 and a panel 18, wherein the upright posts 17 comprise L-shaped upright posts 171 and T-shaped upright posts 172, 4L-shaped upright posts 171 are arranged on 4 corners on the upper side of the bottom plate 12, 2T-shaped upright posts 172 are arranged at the front end and the rear end of the middle part on the upper side of the bottom plate 12, and the top plate 14 is arranged at the top ends of the L-shaped upright posts 171 and the T-shaped upright posts 172; the vertical plate 15 comprises a left vertical plate 151, ultraviolet-transmitting glass 152 and a right vertical plate 153, the T-shaped upright 172 is connected with the ultraviolet-transmitting glass 152, and the left vertical plate 151, the ultraviolet-transmitting glass 152 and the right vertical plate 153 are vertically arranged between the L-shaped upright 171 and the T-shaped upright 172; a partition plate 13 is connected between the ultraviolet-transmitting glass 152 and the left vertical plate 151, and a laser translation device 2 is installed on the partition plate 13;
the inner side of the right vertical plate 153 is connected with a substrate 16, 2 substrates 16 are fixedly arranged on 2L-shaped upright posts 171, and a Z-direction displacement assembly 4 is arranged on the substrate 16;
the top plate 14 is provided with a gas purification device 6 and a control device 7; the bottom plate 12 is provided with a power supply device 8;
the panels 18 include a first front panel 181, a first rear panel 182, a second front panel 183, and a second rear panel 184; the top plate 14 is provided with an air inlet hole 141 and an air outlet hole 142;
the bottom plate 12, the top plate 14, the ultraviolet transmitting glass 152, the right vertical plate 153, the second front plate 183 and the second rear plate 184 form a closed polishing chamber.
The laser translation device 2 comprises an ultraviolet laser 21, an X-direction displacement device 22 and a Y-direction displacement device 23, the Y-direction displacement device 23 is installed on the upper side of the partition plate 13, the X-direction displacement device 22 is installed on the Y-direction displacement device 23, the ultraviolet laser 21 is installed on a moving assembly of the X-direction displacement device 22, and the ultraviolet laser 21, the X-direction displacement device 22, the Y-direction displacement device 23 and the control device 7 are connected.
The model rotating device 3 comprises a stepping motor 301 arranged on the Z-direction displacement assembly 4, the stepping motor 301 is connected with a rotating shaft 304, the upper end of the rotating shaft 304 is provided with a polishing table 308, and the lower side of the polishing table 308 is provided with a heating sheet 309 and is fixed by a sealing plate 310; a power plug 312 is arranged on the lower side of the sealing plate 310; the heating plate 309 is electrically connected to the power plug 312; the upper side of the polishing table 308 contains a low-melting-point alloy 311; the melting point of the low-melting-point alloy 311 is 80 ℃, the 3D printing model 313 is fixed on the polishing table 308 by the solidified low-melting-point alloy 311, and the stepping motor 301, the heating plate 309 and the control device 7 are connected.
The Z-direction displacement assembly 4 comprises a Z-direction displacement device 41, an absorption plate 42 and a bracket 43; the Z-direction displacement device 41 is mounted on the base plate 16, the bracket 43 is mounted on the Z-direction displacement device 41, the absorption plate 42 is clamped by the bracket 43, the stepping motor 301 is mounted on the bracket 43, and the Z-direction displacement device 41 is connected with the control device 7.
The surface cleaning device 5 comprises an air compressor 51, an air duct 52, a fixing plate 53, an air distribution pipe 54 and a nozzle 55; the air duct 52 passes through the air inlet hole 141 on the top plate 14, the upper end of the air duct 52 is connected with the air compressor 51, the air compressor 51 is installed on the upper side of the top plate 14, the lower end of the air duct 52 is connected with the air distribution pipe 54, the air distribution pipe 54 is installed on the fixing plate 53, the fixing plate 53 is fixed on the ultraviolet-transmitting glass 152, the air distribution pipe 54 is provided with the nozzle 55, and the air compressor 51 is connected with the control device 7.
The gas purification device 6 is installed on the top plate 14 through the exhaust hole 142, and the gas purification device 6 adopts a fibrous activated carbon filter screen.
A use method of a 3D printing model laser polishing system comprises the following steps:
1) opening the second front panel 183, placing the 3D printed model 313 on the buffing stage 308;
2) adding a low melting point alloy 311 to the polishing table 308, placing around the 3D printed model 313, and then closing the second front panel 183;
3) starting the Z-direction displacement device 41 by using the control device 7 to drive the model slewing device 3 to move towards the power supply device 8, so that the power plug 312 is connected with the power supply device 8;
4) heating the low-melting-point alloy 311 by using the heating plate 309 until the low-melting-point alloy 311 is completely melted;
5) starting the Z-direction displacement device 41 by using the control device 7, and driving the model revolving device 3 to move upwards to a set height H, so that the irradiation path of the ultraviolet laser emitted by the ultraviolet laser 21 and the top end of the 3D printing model 313 are positioned on the same horizontal plane; in the process of moving the model slewing device 3 upward, the power plug 312 is disengaged from the power supply device 8, and the heating plate 309 stops heating;
6) cooling and solidifying the low-melting-point alloy 311, and fixing the 3D printing model 313 on the polishing table 308;
7) adjusting the ultraviolet laser 21 so that the spot diameter of the ultraviolet laser beam is one third of the thickness of the forming layer of the 3D printing model 313;
8) starting the Z-direction displacement device 41 to drive the model rotating device 3 to move upwards by a distance which is one half of the thickness of the forming layer of the 3D printing model 313;
9) starting an ultraviolet laser 21 to emit ultraviolet laser beams, and carrying out cold polishing treatment of surface molecule stripping layer by layer on the 3D printing model 313; after polishing one layer, the Z-direction displacement device 41 drives the model rotating device 3 to move upwards by a distance equal to the thickness of a forming layer, and then the ultraviolet laser 21 starts to polish the next layer;
simultaneously starting the surface cleaning device 5, and cleaning the surface of the 3D printing model 313 by using compressed air sprayed from the nozzle 55;
10) the surface cleaning device 5 continuously injects compressed air into the polishing chamber, and dust and harmful gas are purified when flowing out through the gas purifying device 6 under the action of the pressure in the closed polishing chamber;
11) after the ultraviolet laser 21 finishes polishing the surface of the 3D printing model 313, closing the laser translation device 2 and the surface cleaning device 5;
12) starting the Z-direction displacement device 41 to drive the model rotation device 3 to move towards the power supply device 8, so that the power plug 312 is connected with the power supply device 8;
13) heating the low-melting-point alloy 311 by using the heating plate 309 until the low-melting-point alloy 311 is completely melted;
14) starting the Z-direction displacement device 41 to drive the model rotation device 3 to move upwards, so that the power plug 312 is separated from the power device 8, and the heating sheet 309 stops heating;
15) opening the second front panel 183, taking out the polished 3D printed model 313, and then closing the second front panel 183;
16) and cleaning the low-melting-point alloy 311 stained on the 3D printing model 313 by using boiling water, and finishing the cold polishing treatment of the 3D printing model 313.
When the 3D printing model 313 of the revolving body is subjected to cold polishing, the model revolving device 3 drives the 3D printing model 313 to make revolving motion by using the stepping motor 301, and the ultraviolet laser 21 only needs to move on the X-direction displacement device 22 to complete the cold polishing work; when the non-rotation type 3D printing model 313 is subjected to cold polishing, the model rotation device 3 is fixed, and the ultraviolet laser 21 completes the cold polishing of the 3D printing model 313 under the linkage action of the X-direction displacement device 22 and the Y-direction displacement device 23; in the 2 working modes, the distance between the emitting point of the ultraviolet laser on the ultraviolet laser 21 and the cold polishing point on the 3D printing model 313 is always kept constant, so as to ensure that the polishing amount of the surface of the 3D printing model 313 is kept consistent; the Z-displacement of the Z-displacement component 4 enables accurate level polishing of the 3D printed model 313; the stepping motor 301 drives the polishing table 308 to rotate at a certain angle, so that the local polishing of the 3D printing model 313 is realized.
The invention has the beneficial effects that:
according to the invention, the accurate polishing of the 3D printing model can be realized within the thickness size range of the forming layer by utilizing the Z-direction displacement assembly; the surface of the 3D printing model can be uniformly polished under the combined action of the X-direction displacement device, the Y-direction displacement device and the model rotating device; the 3D printing model can be fixed repeatedly and conveniently by using the low-melting-point alloy, and the surface of the 3D printing model is effectively prevented from being shielded by a traditional fixing tool; dust and harmful gas generated in the polishing process can be purified in real time; 2 working modes can be adopted to respectively realize the polishing of the 3D printing models of the revolving body and the non-revolving body, so that the polishing working efficiency is effectively improved; local polishing of the 3D printing model can be realized by utilizing the model rotating device; the spot diameter of the ultraviolet laser beam can be controlled to be one third of the thickness of a 3D printing model forming layer, a processing heat affected zone is reduced, the thermal deformation and the mechanical deformation of the 3D printing model are reduced to a great extent, and fine processing can be realized.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the main body frame according to the present invention.
Fig. 3 is a schematic structural diagram of a laser translation device according to the present invention.
FIG. 4 is a schematic view of the construction of the model slewing device and the Z-displacement assembly of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, which are provided for illustration only and are not intended to limit the scope of the present invention.
As shown in fig. 1, a 3D printing model laser polishing system comprises a main body frame 1, and a laser translation device 2, a Z-direction displacement assembly 4, a surface cleaning device 5, a gas purification device 6, a control device 7 and a power supply device 8 which are mounted on the main body frame 1, wherein a model rotation device 3 is mounted on the Z-direction displacement assembly 4;
referring to fig. 2 and 3, the main frame 1 includes a frame body formed by connecting a bottom plate 12, a vertical plate 15, a vertical column 17, a top plate 14 and a panel 18, wherein the vertical column 17 includes L-shaped vertical columns 171 and T-shaped vertical columns 172, 4L-shaped vertical columns 171 are installed on 4 corners of the upper side of the bottom plate 12, 2T-shaped vertical columns 172 are installed at the front and rear ends of the middle part of the upper side of the bottom plate 12, and the top plate 14 is installed at the top ends of the L-shaped vertical columns 171 and the T-shaped vertical columns 172; the vertical plate 15 comprises a left vertical plate 151, ultraviolet-transmitting glass 152 and a right vertical plate 153, the T-shaped upright 172 is connected with the ultraviolet-transmitting glass 152, and the left vertical plate 151, the ultraviolet-transmitting glass 152 and the right vertical plate 153 are vertically arranged between the L-shaped upright 171 and the T-shaped upright 172; a partition plate 13 is connected between the ultraviolet-transmitting glass 152 and the left vertical plate 151, the partition plate 13 is kept horizontal with the bottom plate 12, and the laser translation device 2 is installed on the partition plate 13;
the inner side of the right vertical plate 153 is connected with a substrate 16, 2 substrates 16 are tightly attached to the inner side of the right vertical plate 153 and fixedly arranged on 2L-shaped upright posts 171, a Z-direction displacement assembly 4 is arranged on the substrate 16, and a model rotating device 3 is connected to the Z-direction displacement assembly 4;
the top plate 14 is provided with a gas purification device 6 and a control device 7; the bottom plate 12 is provided with a power supply device 8;
the panels 18 include a first front panel 181, a first rear panel 182, a second front panel 183, and a second rear panel 184; the top plate 14 is provided with an air inlet hole 141 and an air outlet hole 142;
the lower part of the bottom plate 12 is connected with support legs 11, and 2 support legs 11 are arranged at two ends of the lower side of the bottom plate 12;
the bottom plate 12, the top plate 14, the ultraviolet transmitting glass 152, the right vertical plate 153, the second front plate 183 and the second rear plate 184 form a closed polishing chamber.
Referring to fig. 1 and 3, the laser translation device 2 includes an ultraviolet laser 21, an X-direction displacement device 22 and a Y-direction displacement device 23, 2Y-direction displacement devices 23 are installed on the upper side of the partition 13, the X-direction displacement device 22 is installed on the 2Y-direction displacement devices 23, and a moving guide rail on the X-direction displacement device 22 is perpendicular to a moving guide rail on the Y-direction displacement device 23; an ultraviolet laser 21 is mounted on a moving assembly of the X-direction displacement device 22.
Referring to fig. 4, the model slewing device 3 includes a stepping motor 301 mounted on the Z-displacement assembly 4, a support 302 is provided outside the stepping motor 301, the support 302 covers the stepping motor 301, the stepping motor 301 is connected with a slewing shaft 304 through a coupling 303, the middle part of the slewing shaft 304 passes through a bidirectional thrust ball bearing 305 mounted on the support 302, and a loose ring of the bidirectional thrust ball bearing 305 is pressed through an end cover 306; a polishing table 308 is installed at the upper end of the rotating shaft 304 and fixed on the rotating shaft 304 by a set screw 307; a heating plate 309 is arranged on the lower side of the polishing table 308 and fixed by a sealing plate 310; a power plug 312 is arranged on the lower side of the sealing plate 310; the heating plate 309 is electrically connected to the power plug 312; the upper side of the polishing table 308 contains a low-melting-point alloy 311; the melting point of the low melting point alloy 311 is 80 ℃, and the 3D printing model 313 is fixed on the polishing table 308 by the solidified low melting point alloy 311.
Referring to fig. 4, the Z-displacement assembly 4 includes a Z-displacement device 41, an absorption plate 42, and a bracket 43; the Z-direction displacement device 41 is mounted on the 2 base plates 16, the bracket 43 is mounted on the Z-direction displacement device 41, the absorption plate 42 is sandwiched by the bracket 43, and the stepping motor 301 and the support 302 are mounted on the bracket 43.
Referring to fig. 1 and 3, the surface cleaning device 5 includes an air compressor 51, an air duct 52, a fixing plate 53, a distribution pipe 54 and a nozzle 55; the air duct 52 passes through the air inlet hole 141 on the top plate 14, the upper end of the air duct 52 is connected with the air compressor 51, the air compressor 51 is installed on the upper side of the top plate 14 of the main body frame 1, the lower end of the air duct 52 is connected with the air distribution pipe 54, the air distribution pipe 54 is installed on the fixing plate 53, the fixing plate 53 is fixed on the ultraviolet-transmitting glass 152, and the air distribution pipe 54 is provided with the nozzle 55.
Referring to fig. 1 and 2, the gas purification apparatus 6 is installed on the top plate 14 through the exhaust holes 142, and the gas purification apparatus 6 uses a fibrous activated carbon sieve.
Referring to fig. 1, the control unit 7 is installed on the top plate 14, and the control unit 7 is electrically connected to the ultraviolet laser 21, the X-direction displacement unit 22, the Y-direction displacement unit 23, the stepping motor 301, the heating sheet 309, the Z-direction displacement unit 41, and the air compressor 51, respectively.
A use method of a 3D printing model laser polishing system comprises the following steps:
1) opening the second front panel 183, placing the 3D printed model 313 on the buffing stage 308;
2) adding a low melting point alloy 311 to the polishing table 308, placing around the 3D printed model 313, and then closing the second front panel 183;
3) starting the Z-direction displacement device 41 by using the control device 7 to drive the model slewing device 3 to move towards the power supply device 8, so that the power plug 312 is connected with the power supply device 8;
4) heating the low-melting-point alloy 311 by using the heating plate 309 until the low-melting-point alloy 311 is completely melted;
5) starting the Z-direction displacement device 41 by using the control device 7, and driving the model revolving device 3 to move upwards to a set height H, so that the irradiation path of the ultraviolet laser emitted by the ultraviolet laser 21 and the top end of the 3D printing model 313 are positioned on the same horizontal plane; in the process of moving the model slewing device 3 upward, the power plug 312 is disengaged from the power supply device 8, and the heating plate 309 stops heating;
6) cooling and solidifying the low-melting-point alloy 311, and fixing the 3D printing model 313 on the polishing table 308;
7) adjusting the ultraviolet laser 21 so that the spot diameter of the ultraviolet laser beam is one third of the thickness of the forming layer of the 3D printing model 313;
8) starting the Z-direction displacement device 41 to drive the model rotating device 3 to move upwards by a distance which is one half of the thickness of the forming layer of the 3D printing model 313;
9) starting an ultraviolet laser 21 to emit ultraviolet laser beams, and carrying out cold polishing treatment of surface molecule stripping layer by layer on the 3D printing model 313; after polishing one layer, the Z-direction displacement device 41 drives the model rotating device 3 to move upwards by a distance equal to the thickness of a forming layer, and then the ultraviolet laser 21 starts to polish the next layer;
simultaneously starting the surface cleaning device 5, and cleaning the surface of the 3D printing model 313 by using compressed air sprayed from the nozzle 55;
10) when step 9) is performed, a large amount of dust and harmful gas are formed in the closed polishing chamber; because the surface cleaning device 5 continuously injects compressed air into the polishing chamber, the dust and harmful gases are purified when flowing out through the gas purifying device 6 under the action of the pressure in the closed polishing chamber;
11) after the ultraviolet laser 21 finishes polishing the surface of the 3D printing model 313, closing the laser translation device 2 and the surface cleaning device 5;
12) starting the Z-direction displacement device 41 to drive the model rotation device 3 to move towards the power supply device 8, so that the power plug 312 is connected with the power supply device 8;
13) heating the low-melting-point alloy 311 by using the heating plate 309 until the low-melting-point alloy 311 is completely melted;
14) starting the Z-direction displacement device 41 to drive the model rotation device 3 to move upwards, so that the power plug 312 is separated from the power device 8, and the heating sheet 309 stops heating;
15) opening the second front panel 183, taking out the polished 3D printed model 313, and then closing the second front panel 183;
16) and cleaning the low-melting-point alloy 311 stained on the 3D printing model 313 by using boiling water, and finishing the cold polishing treatment of the 3D printing model 313.
When the 3D printing model 313 of the revolving body is subjected to cold polishing, the model revolving device 3 drives the 3D printing model 313 to make revolving motion by using the stepping motor 301, and the ultraviolet laser 21 can finish cold polishing work only by moving on the X-direction displacement device 22; when the non-rotation type 3D printing model 313 is subjected to cold polishing, the model rotation device 3 is fixed, and the ultraviolet laser 21 completes the cold polishing of the 3D printing model 313 under the linkage action of the X-direction displacement device 22 and the Y-direction displacement device 23; in the 2 working modes, the distance between the emitting point of the ultraviolet laser on the ultraviolet laser 21 and the cold polishing point on the 3D printing model 313 is always kept constant, so as to ensure that the polishing amount of the surface of the 3D printing model 313 is kept consistent; the Z-displacement of the Z-displacement component 4 enables accurate level polishing of the 3D printed model 313; the stepping motor 301 drives the polishing table 308 to rotate at a certain angle, so that the local polishing of the 3D printing model 313 can be realized.
Claims (7)
1. A3D printing model laser polishing system is characterized by comprising a main body frame (1), and a laser translation device (2), a Z-direction displacement assembly (4), a surface cleaning device (5), a gas purification device (6), a control device (7) and a power supply device (8) which are arranged on the main body frame (1), wherein a model rotation device (3) is arranged on the Z-direction displacement assembly (4);
the main body frame (1) comprises a frame body formed by connecting a bottom plate (12), a vertical plate (15), upright columns (17), a top plate (14) and a panel (18), wherein the upright columns (17) comprise L-shaped upright columns (171) and T-shaped upright columns (172), 4L-shaped upright columns (171) are arranged on 4 corners of the upper side of the bottom plate (12), 2T-shaped upright columns (172) are arranged at the front end and the rear end of the middle part of the upper side of the bottom plate (12), and the top plate (14) is arranged at the top ends of the L-shaped upright columns (171) and the T-shaped upright columns (172); the vertical plate (15) comprises a left vertical plate (151), ultraviolet-transmitting glass (152) and a right vertical plate (153), the T-shaped upright post (172) is connected with the ultraviolet-transmitting glass (152), and the left vertical plate (151), the ultraviolet-transmitting glass (152) and the right vertical plate (153) are vertically arranged between the L-shaped upright post (171) and the T-shaped upright post (172); a partition plate (13) is connected between the ultraviolet-transmitting glass (152) and the left vertical plate (151), and a laser translation device (2) is installed on the partition plate (13);
the inner side of the right vertical plate (153) is connected with a base plate (16), 2 base plates (16) are fixedly arranged on 2L-shaped upright posts (171), and a Z-direction displacement assembly (4) is arranged on the base plate (16);
the top plate (14) is provided with a gas purification device (6) and a control device (7); a power supply device (8) is arranged on the bottom plate (12);
the panel (18) comprises a first front panel (181), a first rear panel (182), a second front panel (183) and a second rear panel (184); the top plate (14) is provided with an air inlet hole (141) and an air outlet hole (142);
a closed polishing chamber is formed by a bottom plate (12), a top plate (14), ultraviolet-transmitting glass (152), a right vertical plate (153), a second front panel (183) and a second rear panel (184);
the model rotating device (3) comprises a stepping motor (301) arranged on the Z-direction displacement assembly (4), a polishing table (308) is arranged at the upper end of the rotating shaft (304), and a heating sheet (309) is arranged on the lower side of the polishing table (308) and fixed by a sealing plate (310); a power plug (312) is arranged on the lower side of the sealing plate (310); the heating plate (309) is electrically connected with the power plug (312); the upper side of the polishing table (308) is filled with low-melting-point alloy (311); the melting point of the low-melting-point alloy (311) is 80 ℃, the 3D printing model (313) is fixed on the polishing table (308) by the solidified low-melting-point alloy (311), and the stepping motor (301), the heating sheet (309) and the control device (7) are connected.
2. The 3D printing model laser polishing system according to claim 1, characterized in that: laser translation device (2) including ultraviolet laser instrument (21), X is to displacement device (22) and Y to displacement device (23), Y is installed to displacement device (23) to the upside of baffle (13), Y is to installing X on displacement device (23) to displacement device (22), install ultraviolet laser instrument (21) on the removal subassembly of X to displacement device (22), ultraviolet laser instrument (21), X is to displacement device (22), Y is to displacement device (23) and controlling means (7) connection.
3. The 3D printing model laser polishing system according to claim 1, characterized in that: the Z-direction displacement assembly (4) comprises a Z-direction displacement device (41), an absorption plate (42) and a bracket (43); the Z-direction displacement device (41) is arranged on the substrate (16), a bracket (43) is arranged on the Z-direction displacement device (41), the bracket (43) clamps the absorbing plate (42), a stepping motor (301) is arranged on the bracket (43), and the Z-direction displacement device (41) is connected with the control device (7).
4. The 3D printing model laser polishing system according to claim 1, characterized in that: the surface cleaning device (5) comprises an air compressor (51), an air duct (52), a fixing plate (53), an air distribution pipe (54) and a nozzle (55); the air guide pipe (52) penetrates through an air inlet hole (141) in the top plate (14), the upper end of the air guide pipe (52) is connected with the air compressor (51), the air compressor (51) is installed on the upper side of the top plate (14), the lower end of the air guide pipe (52) is connected with the air distribution pipe (54), the air distribution pipe (54) is installed on the fixing plate (53), the fixing plate (53) is fixed on the ultraviolet-transmitting glass (152), the air distribution pipe (54) is provided with a nozzle (55), and the air compressor (51) is connected with the control device (7).
5. The 3D printing model laser polishing system according to claim 1, characterized in that: the gas purification device (6) is arranged on the top plate (14) through the exhaust hole (142), and the gas purification device (6) adopts a fibrous active carbon filter screen.
6. The method for using the laser polishing system for the 3D printing model according to claim 1, characterized by comprising the following steps:
1) opening the second front panel (183), placing the 3D printed model (313) on the polishing table (308);
2) adding a low melting point alloy (311) onto the polishing table (308), placing around the 3D printed model (313), and then closing the second front panel (183);
3) starting the Z-direction displacement device (41) by using the control device (7) to drive the model rotation device (3) to move towards the power supply device (8), so that the power plug (312) is connected with the power supply device (8);
4) heating the low-melting-point alloy (311) by using a heating plate (309) until the low-melting-point alloy (311) is completely melted;
5) starting a Z-direction displacement device (41) by using a control device (7) to drive a model rotation device (3) to move upwards to a set height H, so that an irradiation path of ultraviolet laser emitted by an ultraviolet laser (21) and the top end of a 3D printing model (313) are positioned on the same horizontal plane; in the process that the model rotating device (3) moves upwards, the power plug (312) is separated from the power device (8), and the heating sheet (309) stops heating;
6) cooling and solidifying the low-melting-point alloy (311), and fixing the 3D printing model (313) on the polishing table (308);
7) adjusting the ultraviolet laser (21) so that the spot diameter of the ultraviolet laser beam is one third of the forming layer thickness of the 3D printing model (313);
8) starting the Z-direction displacement device (41) to drive the model rotating device (3) to move upwards by a distance which is one half of the thickness of the forming layer of the 3D printing model (313);
9) starting an ultraviolet laser (21) to emit ultraviolet laser beams, and carrying out cold polishing treatment of surface molecule peeling on the 3D printing model (313) layer by layer; after polishing one layer, the Z-direction displacement device (41) drives the model rotating device (3) to move upwards by a distance of one forming layer thickness, and then the ultraviolet laser (21) starts to polish the next layer;
simultaneously starting a surface cleaning device (5), and cleaning the surface of the 3D printing model (313) by using compressed air sprayed by a nozzle (55);
10) the surface cleaning device (5) continuously injects compressed air into the polishing chamber, and dust and harmful gas are purified when flowing out through the gas purifying device (6) under the action of the pressure in the closed polishing chamber;
11) after the ultraviolet laser (21) finishes polishing the surface of the 3D printing model (313), closing the laser translation device (2) and the surface cleaning device (5);
12) starting the Z-direction displacement device (41) to drive the model rotation device (3) to move towards the power supply device (8), so that the power plug (312) is connected with the power supply device (8);
13) heating the low-melting-point alloy (311) by using a heating plate (309) until the low-melting-point alloy (311) is completely melted;
14) starting the Z-direction displacement device (41) to drive the model rotation device (3) to move upwards, so that the power plug (312) is separated from the power device (8) and the heating sheet (309) stops heating;
15) opening the second front panel (183), taking out the polished 3D printing model (313), and then closing the second front panel (183);
16) and cleaning the low-melting-point alloy (311) stained on the 3D printing model (313) by using boiling water, and finishing the cold polishing treatment of the 3D printing model (313).
7. The use method of the 3D printing model laser polishing system according to claim 6, characterized in that: when the 3D printing model (313) of a revolving body is subjected to cold polishing, the model revolving device (3) drives the 3D printing model (313) to do revolving motion by utilizing the stepping motor (301), and the ultraviolet laser (21) only needs to move on the X-direction displacement device (22) to complete cold polishing work; when the non-rotary 3D printing model (313) is subjected to cold polishing, the model rotary device (3) is fixed, and the ultraviolet laser (21) completes the cold polishing of the 3D printing model (313) under the linkage action of the X-direction displacement device (22) and the Y-direction displacement device (23); in the working mode of carrying out cold polishing on the 3D printing model (313) of the revolving body and carrying out cold polishing on the 3D printing model (313) of the non-revolving body, the distance between the emission point of ultraviolet laser on the ultraviolet laser (21) and the cold polishing point on the 3D printing model (313) is always kept unchanged so as to ensure that the polishing amount of the surface of the 3D printing model (313) is kept consistent; the Z-direction displacement of the Z-direction displacement component (4) can accurately realize the level polishing of the 3D printing model (313); the stepping motor (301) drives the polishing table (308) to rotate at a certain angle, and local polishing of the 3D printing model (313) is achieved.
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| CN113118635A (en) * | 2021-04-21 | 2021-07-16 | 深圳信息职业技术学院 | Magnetic field laser polishing device and method |
| CN115763869B (en) * | 2022-12-16 | 2024-04-16 | 广东省科学院新材料研究所 | Support connector for solid oxide fuel cell or electrolytic cell and preparation method thereof |
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