CN109352989B - 3D printing method for light simple pendulum - Google Patents

3D printing method for light simple pendulum Download PDF

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Publication number
CN109352989B
CN109352989B CN201811441368.6A CN201811441368A CN109352989B CN 109352989 B CN109352989 B CN 109352989B CN 201811441368 A CN201811441368 A CN 201811441368A CN 109352989 B CN109352989 B CN 109352989B
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simple pendulum
pendulum
printing
temperature
light simple
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CN109352989A (en
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卢松涛
吴晓宏
李杨
秦伟
姚远
康红军
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

The invention discloses a method for 3D printing of a light simple pendulum, and relates to the field of 3D printing. The invention aims to solve the technical problem of high error generated by the conventional alloy material simple pendulum measurement. The method comprises the following steps: firstly, drawing a simple pendulum model with the format of STL; secondly, importing the model into IEMAI 3D slicing software, setting relevant parameters, and exporting a data file which is in a Gcode format and can be identified by a 3D printer; thirdly, guiding the obtained Gcode file into a high-temperature 3D printer, and printing by using an ABS wire rod to obtain a single pendulum crude product; and fourthly, finishing, blowing and cleaning to obtain the light simple pendulum. The weight of the light simple pendulum is only 28% -39% of that of an aluminum alloy simple pendulum with the same size, the sensitivity is high, and the light simple pendulum can be used for testing micro thrust.

Description

3D printing method for light simple pendulum
Technical Field
The invention relates to the field of 3D printing.
Background
The MEMS micro-thruster has the characteristics of light weight, small volume, strong controllability and the like, solves the important problem of limiting the advancement of the micro-nano satellite, provides milli-Newton micro-thrust for the micro-nano satellite, and is used for orbit transfer, attitude control and position maintenance. The micro-thruster is the main power component of the micro-satellite, and the performance of the micro-thruster is directly related to the wide application of the micro-satellite. In order to adapt to the micro Newton thrust required by the in-orbit operation of the micro satellite, the thrust of the micro propeller is also in the micro Newton magnitude. In the development process of the micro-thruster, the thrust of the micro-thruster is tested. In the existing single pendulum testing device commonly used for testing micro Newton magnitude thrust, an important component is a single pendulum, and an MEMS micro propeller facing the single pendulum is ignited to enable gas sprayed out of the single pendulum to impact the single pendulum and the single pendulum swings after being stressed, so that the magnitude of the thrust generated by the MEMS micro propeller is calculated, but the existing single pendulum is generally made of aluminum alloy and titanium alloy materials. Due to the heavy mass of the simple pendulum, a great error is generated for the measurement of the thrust of the micro newton magnitude. Therefore, it is very important to design a simple pendulum with high precision and high sensitivity.
Disclosure of Invention
The invention aims to solve the technical problem of overhigh error generated by the conventional alloy material simple pendulum measurement. And provides a method for 3D printing of a light simple pendulum.
The invention discloses a method for 3D printing of a light simple pendulum, which comprises the following steps:
firstly, carrying out equal-proportion drawing modeling on a single pendulum by using Solidworks drawing software according to a structure diagram of the single pendulum to obtain a single pendulum model with a format of STL;
secondly, importing the obtained model into IEMAI 3D slicing software, and setting related parameters: the thickness of the layer is 0.05-0.2 mm, the filling density is 80-95%, the printing speed is 40-100 mm/s, the temperature of a printing head is 220-260 ℃, the temperature of a hot bed is 80-100 ℃, and the temperature of an inner cavity is 70-90 ℃, and a data file which can be identified by a 3D printer and has a Gcode format is exported after parameter setting is completed;
thirdly, importing the obtained Gcode file into a high-temperature 3D printer; adding the ABS wire into a high-temperature 3D printer, and printing to obtain a simple pendulum crude product;
and fourthly, finishing and cleaning the coarse single pendulum product obtained in the third step to obtain the light single pendulum.
The simple pendulum printed by the 3D printer has good forming strength and dimensional stability, is highly matched with the designed optimal simple pendulum structure size, has excellent mechanical performance, and can completely meet the requirements of a micro-thrust test system.
The 3D-molded simple pendulum structure has the mass of only 1-1.4 g, is 28% -39% of an aluminum alloy simple pendulum with the same size, has the advantages of light weight, small space resistance, simplicity in preparation, high reproducibility and low price, can greatly improve the micro-thrust test range of a test system, and can also improve the design precision and the processing precision of an impact pendulum test system. Simultaneously, traditional metal texture is compared to this light polymer simple pendulum structure, has higher sensitivity, and then can show the discernment degree and the responsiveness of lift system to the microthrust.
Drawings
FIG. 1 is a front view of a prepared simple pendulum in example 1;
FIG. 2 is a side view of a simple pendulum prepared in example 1
FIG. 3 is a schematic structural view of a single pendulum testing apparatus in example 1;
fig. 4 is a schematic structural diagram of a swing device of the simple pendulum test device in embodiment 1.
Detailed Description
The first embodiment is as follows: the method for 3D printing of the light simple pendulum comprises the following steps:
firstly, carrying out equal-proportion drawing modeling on a single pendulum by using Solidworks drawing software according to a structure diagram of the single pendulum to obtain a single pendulum model with a format of STL;
secondly, importing the obtained model into IEMAI 3D slicing software, and setting related parameters: the thickness of the layer is 0.05-0.2 mm, the filling density is 80-95%, the printing speed is 40-100 mm/s, the temperature of a printing head is 220-260 ℃, the temperature of a hot bed is 80-100 ℃, and the temperature of an inner cavity is 70-90 ℃, and a data file which can be identified by a 3D printer and has a Gcode format is exported after parameter setting is completed;
thirdly, importing the obtained Gcode file into a high-temperature 3D printer; adding the ABS wire into a high-temperature 3D printer, and printing to obtain a simple pendulum crude product;
and fourthly, polishing corners of the obtained simple pendulum crude product by using 2000-mesh fine sand paper, purging by using nitrogen, and then putting the obtained simple pendulum crude product into an ultrasonic cleaner for removing residual dust on the surface by using ultrasonic waves to obtain a simple pendulum finished product.
The second embodiment is as follows: the difference between the present embodiment and the first embodiment is that the wire diameter of the ABS wire is 1.7-2.0 mm. The rest is the same as the first embodiment.
The third concrete implementation mode: the difference between the second embodiment and the first or second embodiment is that the thickness of the layer set in the second step is 0.1-0.15 mm. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is that the filling density set in the second step is 85% to 90%. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the difference between the present embodiment and one of the first to fourth embodiments is that the printing speed set in the second step is 50 to 70 mm/s. The other is the same as one of the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is that the print head temperature set in the second step is 240 to 250 ℃. The other is the same as one of the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and the first to sixth embodiments is that the temperature of the hot bed set in the second step is 85 to 90 ℃. The other is the same as one of the first to sixth embodiments.
The specific implementation mode is eight: the difference between the present embodiment and one of the first to seventh embodiments is that the temperature of the inner cavity set in the second step is 80-85 ℃. The other is the same as one of the first to seventh embodiments.
The specific implementation method nine: this embodiment is different from the first to eighth embodiments in that the surface of the ABS wire is coated with paraffin or ultra-fine Polytetrafluoroethylene (PTFE) in step three. The rest is the same as the first to eighth embodiments.
In the embodiment, the ABS wire coated with paraffin on the surface can volatilize the paraffin to form micropores in a workpiece in the printing process, so that the weight of the workpiece can be further reduced. The surface is coated with superfine polytetrafluoroethylene which is not compatible with the surrounding matrix to form micropores.
The detailed implementation mode is ten: the difference between this embodiment and one of the first to ninth embodiments is that the trimming in step four is to polish the corners with 1500-2000 mesh fine sand paper and purge with nitrogen. The other is the same as one of the first to ninth embodiments.
The following tests were used to verify the beneficial effects of the present invention:
example 1: the method for 3D printing of the light simple pendulum comprises the following steps:
firstly, carrying out equal-proportion drawing modeling on a single pendulum by using Solidworks drawing software according to a structure diagram of the single pendulum to obtain a single pendulum model with a format of STL; the simple pendulum consists of a pendulum rod and a pendulum piece, wherein the length of the pendulum rod is 161mm, the width of the pendulum rod is 4mm, and the thickness of the pendulum rod is 2 mm; the length of the swinging piece is 20mm, the width is 20mm, and the thickness is 2 mm; its front view is shown in fig. 1 and its side view is shown in fig. 2;
secondly, the obtained model is imported into IEMAI 3D slicing software, and the set parameters are as follows: the layer thickness is 0.1mm, the filling density is 85%, the printing speed is 60mm/s, the printing head temperature is 240 ℃, the hot bed temperature is 90 ℃ and the inner cavity temperature is 80 ℃, and after parameter setting is completed, a data file which is in a Gcode format and can be identified by a 3D printer is exported;
thirdly, the obtained Gcode file is led into an Dongguan Yimai MAGIC-HT-L type high-temperature 3D printer; adding an ABS wire with the wire diameter of 1.75mm into a high-temperature 3D printer, and printing to obtain a simple pendulum crude product;
and fourthly, polishing corners of the obtained simple pendulum crude product by using 2000-mesh fine sand paper, purging by using nitrogen, and then putting the obtained simple pendulum crude product into an ultrasonic cleaner for ultrasonic cleaning to remove residual dust on the surface to obtain a light simple pendulum finished product.
The weight of the light simple pendulum obtained in the embodiment is 1.35 g, and the weight of the light simple pendulum is only 39% of that of an aluminum alloy simple pendulum with the same size. The simple pendulum obtained in the embodiment is used for a simple pendulum testing device, the structure diagram of the simple pendulum testing device is shown in fig. 3, and the simple pendulum testing device consists of a platform 1, an upright post 2, a support frame 3 and a swinging device 4; wherein the upright post 2 is arranged on the platform 1, the support frame 3 is arranged on the upright post 2, and the support frame 3 is provided with a knife bearing; the swinging device 4 consists of a light simple pendulum 4-1 obtained in the embodiment, a swinging frame 4-2, a flat beam 4-3, a balance nut 4-4 and a middle knife 4-5; two ends of the flat beam 4-3 are provided with threads and matched with a balance nut; the middle knife 4-5 is arranged in the middle of the flat beam 4-3, and the knife edge is downward; two ends of the swing frame 4-2 are fixed on the flat beam 4-3, and the simple pendulum 4-1 is fixed in the middle of the swing frame 4-2. The middle knife 4-5 of the swinging device 4 is matched with a knife bearing on the supporting frame 3. The swinging device 4 is an important component of the simple pendulum testing device and is arranged on the simple pendulum testing device, and because the simple pendulum is light in weight, errors in the process of testing the micro Newton thrust can be reduced, and the testing sensitivity and precision are improved.
Example 2: the method for 3D printing of the light simple pendulum comprises the following steps:
firstly, carrying out equal-proportion drawing modeling on a single pendulum by using Solidworks drawing software according to a structure diagram of the single pendulum to obtain a single pendulum model with a format of STL; the simple pendulum consists of a pendulum rod and a pendulum piece, wherein the length of the pendulum rod is 161mm, the width of the pendulum rod is 4mm, and the thickness of the pendulum rod is 2 mm; the length of the swinging piece is 20mm, the width is 20mm, and the thickness is 2 mm; as shown in fig. 1;
secondly, the obtained model is imported into IEMAI 3D slicing software, and the set parameters are as follows: the layer thickness is 0.12mm, the filling density is 85%, the printing speed is 60mm/s, the printing head temperature is 250 ℃, the hot bed temperature is 88 ℃ and the inner cavity temperature is 80 ℃, and after parameter setting is completed, a data file which is in a Gcode format and can be identified by a 3D printer is exported;
thirdly, the obtained Gcode file is led into an Dongguan Yimai MAGIC-HT-L type high-temperature 3D printer; coating paraffin on the surface of an ABS wire rod with the wire diameter of 1.75mm, adding the ABS wire rod into a high-temperature 3D printer, and printing to obtain a single pendulum crude product;
and fourthly, polishing corners of the obtained simple pendulum crude product by using 2000-mesh fine sand paper, purging by using nitrogen, and then putting the obtained simple pendulum crude product into an ultrasonic cleaner for removing residual dust on the surface by using ultrasonic waves to obtain a light simple pendulum finished product.
The mass of the obtained simple pendulum is 1.02 g, compared with the simple pendulum prepared in the embodiment 1, the mass is reduced by 24%, the mass of the obtained simple pendulum is only 29.4% of that of the aluminum alloy simple pendulum with the same size, and meanwhile, the strength of the obtained simple pendulum can meet the use requirement. The light simple pendulum prepared in this example was observed to produce regular micropores inside the structure. The simple pendulum with the further reduced mass is assembled into the simple pendulum testing device with the same structure as the embodiment 1, so that the simple pendulum testing device can further reduce errors generated in the process of the micro Newton magnitude thrust test, and the sensitivity and the precision of the test are improved again.
Example 3: the method for 3D printing of the light simple pendulum comprises the following steps:
firstly, carrying out equal-proportion drawing modeling on a single pendulum by using Solidworks drawing software according to a structure diagram of the single pendulum to obtain a single pendulum model with a format of STL; the simple pendulum consists of a pendulum rod and a pendulum piece, wherein the length of the pendulum rod is 161mm, the width of the pendulum rod is 4mm, and the thickness of the pendulum rod is 2 mm; the length of the swinging piece is 20mm, the width is 20mm, and the thickness is 2 mm; as shown in fig. 1;
secondly, the obtained model is imported into IEMAI 3D slicing software, and the set parameters are as follows: the layer thickness is 0.12mm, the filling density is 90%, the printing speed is 60mm/s, the printing head temperature is 260 ℃, the hot bed temperature is 100 ℃ and the inner cavity temperature is 90 ℃, and after parameter setting is completed, a data file which is in a Gcode format and can be identified by a 3D printer is exported;
thirdly, the obtained Gcode file is led into an Dongguan Yimai MAGIC-HT-L type high-temperature 3D printer; coating the surface of an ABS wire rod with the wire diameter of 1.75mm with ultrafine polytetrafluoroethylene with the particle size of 1-2 microns, adding the ABS wire rod into a high-temperature 3D printer, and printing to obtain a simple pendulum crude product;
and fourthly, polishing corners of the obtained simple pendulum crude product by using 2000-mesh fine sand paper, purging by using nitrogen, and then putting the obtained simple pendulum crude product into an ultrasonic cleaner for removing residual dust on the surface by using ultrasonic waves to obtain a light simple pendulum finished product.
The mass of the obtained simple pendulum is 1.00 g, compared with the simple pendulum prepared in the example 1, the mass of the simple pendulum is reduced by 26%, the mass of the simple pendulum is only 28.9% of that of an aluminum alloy simple pendulum with the same size, and meanwhile, the strength of the simple pendulum can meet the use requirement. The light simple pendulum prepared in this example was observed, and it was found that irregular micropores were generated inside the structure.

Claims (9)

1. A method for 3D printing of a light simple pendulum is characterized by comprising the following steps:
firstly, carrying out equal-proportion drawing modeling on a single pendulum by using Solidworks drawing software according to a structure diagram of the single pendulum to obtain a single pendulum model with a format of STL;
secondly, importing the obtained model into IEMAI 3D slicing software, and setting related parameters: the thickness of the layer is 0.05-0.2 mm, the filling density is 80-95%, the printing speed is 40-100 mm/s, the temperature of a printing head is 220-260 ℃, the temperature of a hot bed is 80-100 ℃, and the temperature of an inner cavity is 70-90 ℃, and a data file which can be identified by a 3D printer and has a Gcode format is exported after parameter setting is completed;
thirdly, importing the obtained Gcode file into a high-temperature 3D printer; adding the ABS wire coated with paraffin or superfine polytetrafluoroethylene on the surface into a high-temperature 3D printer, and printing to obtain a single pendulum crude product;
and fourthly, polishing corners of the obtained simple pendulum crude product by using 2000-mesh fine sand paper, purging by using nitrogen, and then putting the obtained simple pendulum crude product into an ultrasonic cleaner for ultrasonic removal of residual dust on the surface to obtain a light simple pendulum finished product for testing micro Newton thrust.
2. The method for 3D printing of the light simple pendulum is characterized in that the diameter of an ABS wire is 1.7-2.0 mm.
3. The method for 3D printing the light simple pendulum is characterized in that the layer thickness set in the second step is 0.1-0.15 mm.
4. The method for 3D printing the light simple pendulum according to the claim 1 or 2, wherein the packing density set in the second step is 85% -90%.
5. The method for 3D printing the light simple pendulum is characterized in that the printing speed set in the second step is 50-70 mm/s.
6. The method for 3D printing the light simple pendulum is characterized in that the temperature of the printing head set in the second step is 240-250 ℃.
7. The method for 3D printing the light simple pendulum is characterized in that the temperature of the hot bed set in the second step is 85-90 ℃.
8. The method for 3D printing of the light simple pendulum is characterized in that the temperature of the inner cavity set in the second step is 80-85 ℃.
9. The method for 3D printing the light simple pendulum of claim 1 or 2, wherein the finishing in the fourth step is to polish the corners with 1500-2000 mesh fine sand paper and purge with nitrogen.
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