KR101676738B1 - Apparatus for controlling width and power of beam using in three dimensional printer - Google Patents

Apparatus for controlling width and power of beam using in three dimensional printer Download PDF

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Publication number
KR101676738B1
KR101676738B1 KR1020150130689A KR20150130689A KR101676738B1 KR 101676738 B1 KR101676738 B1 KR 101676738B1 KR 1020150130689 A KR1020150130689 A KR 1020150130689A KR 20150130689 A KR20150130689 A KR 20150130689A KR 101676738 B1 KR101676738 B1 KR 101676738B1
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KR
South Korea
Prior art keywords
lens
width
sintered
powder
unit
Prior art date
Application number
KR1020150130689A
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Korean (ko)
Inventor
박종현
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주식회사 카본티씨지
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Priority to KR1020150130689A priority Critical patent/KR101676738B1/en
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Publication of KR101676738B1 publication Critical patent/KR101676738B1/en

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    • B29C67/0085—
    • 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
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • 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
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention relates to an apparatus for controlling beams of a three-dimensional (3D) printer. The apparatus according to the present invention comprises: a beam-emitting section; a reflection mirror section which reflects the beams emitted from the beam-emitting section to the site of powder to be sintered; a beam width-controlling section which controls the width of the beams reflected from the reflection mirror section or controls the width of the beams emitted from the beam-emitting section, and then increases the beam width when the area of the site of powder to be sintered is large, or decreases the beams width when the area of the site of powder to be sintered is small; and a beam intensity-controlling section which gives instructions of increasing the intensity of beams to the beam-emitting section when the width of the beams controlled by the beam width-controlling section is large, or decreasing the intensity of beams to the beam-emitting section when the width of the beams controlled by the beam width-controlling section is small, so that the intensity of beams may be controlled to the same intensity regardless of beams widths.

Description

TECHNICAL FIELD [0001] The present invention relates to a 3D printer beam adjusting apparatus,

The present invention relates to a 3D printer beam conditioning apparatus.

3D printers are printers that produce 3D objects. 3D printers are classified into cutting-type 3D printers and stacked-type 3D printers.

A cutting-type 3D printer is a printer that cuts a large chunk into pieces to produce three-dimensional solid objects. A stacked-type 3D printer is a printer that stacks materials to produce three-dimensional solid objects.

Cutting-type 3D printers lose material because they cut large chunks to create three-dimensional solid objects, but stacked 3D printers do not lose material because they stack up layers of material to create three-dimensional solid bodies.

Because of these advantages, most of the recently released 3D printers are stacked 3D printers.

There are three types of stacked 3D printers: 3D printers using FDM (Fused Deposition Modeling) using solid materials, 3D printers using SLA (Stereo Lithography Appartus) using liquid materials, Selective Laser Sintering ) -Type 3D printers.

The 3D printer equipped with the beam adjusting device of the present invention is a SLS type 3D printer.

In the SLS type 3D printer, a beam (electron beam, laser beam) is shot on a powder, and the powder is sintered to produce a product. Conventional beam conditioning apparatus shoots a beam of constant diameter into powder.

If the diameter of the beam is wide, it is possible to make the product quickly, but it is difficult to finely form the product to every corner of the product. Conversely, if the diameter of the beam is narrow, it can be finely molded to every corner of the product, but the speed of making the product is slow.

Korean Patent No. 10-1498679

It is an object of the present invention to provide a new concept of a 3D printer beam adjusting apparatus which increases the speed at which a product is formed while finely shaping every corner of the product.

In order to achieve the above object, a 3D printer beam adjusting apparatus includes:

A beam emitter;

A reflecting mirror part for reflecting the beam emitted from the beam emitting part to a powder part to be sintered;

If the area of the powder to be sintered is large, the width of the beam is widened. If the area of the powder part to be sintered is narrow A beam width adjusting unit for narrowing the beam width; And

Wherein the control unit instructs the beam emitting unit to increase the intensity of the beam when the width of the beam adjusted by the beam width adjusting unit is wide and when the width of the beam adjusted by the beam width adjusting unit is narrow, And a beam intensity controller for controlling the beam intensity to be the same regardless of the beam width.

According to the present invention, when the area of powder to be sintered is wide, the beam width is widened and when the area of the powder part to be sintered is narrow, the width of the beam is narrowed. Therefore, .

The present invention increases the intensity of a beam when the width of the beam is wide and decreases the intensity of the beam when the width of the beam is narrow, thereby controlling the beam intensity to be the same regardless of the beam width. Thus, a product having a uniform sintering strength can be produced.

1 is a schematic view of a 3D printer equipped with a beam adjusting apparatus according to an embodiment of the present invention.
FIG. 2 is a flow chart for explaining the operation of the beam adjusting apparatus shown in FIG. 1, in which the position of the moving lens is moved to adjust the beam width.
3 is a view showing a state in which the moving lens is moved upward and the beam width is narrowed.
4 is a view showing a state in which the movable lens is moved downward to enlarge the beam width.
FIG. 5 is a flow chart for explaining the operation of the beam adjusting apparatus shown in FIG. 1, in which the beam width is adjusted by changing the shape of the deformable lens instead of the movement of the moving lens.
6 is a view showing a state in which the shape of the deformed lens is changed flat and the beam width is kept at an ordinary size.
7 is a view showing a state in which the shape of the deformed lens is concavely changed and the beam width is widened.
8 is a view showing a state in which the shape of the deformed lens is changed convexly and the beam width is narrowed.

Hereinafter, the 3D printer beam adjusting apparatus of the present invention will be described in detail.

The 3D printer 1 shown in Fig. 1 is composed of a supply unit 10, a molding unit 20, and a beam adjusting apparatus 100. [

The supply section 10 is composed of a powder cylinder 11, a piston 12, a piston drive motor (not shown), a roller 13, and a roller drive motor (not shown).

Powder is contained in the powder container (11). The piston (12) lifts the bottom (11a) of the powder cylinder (11). A drive motor (not shown) provides a force to lift the bottom 11a of the powder cylinder 11 to the piston 12. [ When the bottom 11a rises, the powder overflows out of the powder container 11. The roller 13 pushes powder overflowing from the powder cylinder 11 while rotating and rolling it, and supplies the powder to the forming section 20. A roller driving motor (not shown) rotates and provides a rolling force to the roller 13.

The molding part 20 is composed of a molding cylinder 21, a piston 22, and a driving motor (not shown).

And the powder supplied from the powder cylinder 11 is contained in the shaping cylinder 21. The powder P is sintered in the mold 21. The piston 22 lowers the bottom 21a of the molding cylinder 21 while the product M is being produced. A driving motor (not shown) provides the piston 22 with a force for lowering the bottom of the molding cylinder 21. [

The beam adjustment apparatus 100 sits a beam on the powder P contained in the shaping cylinder 21 and sinters it. The beam adjusting apparatus 100 repeats the operation of sintering the powder P to produce a product M having a desired shape and size.

The beam adjusting apparatus 100 includes a beam emitting unit 110, a reflecting mirror 120, a beam width adjusting unit 130, and a beam intensity adjusting unit 140.

The beam emitting unit 110 emits a laser beam and an electron beam.

The reflection mirror unit 120 reflects the beam B emitted from the beam emitter 11 to the powder P contained in the shaping barrel 21.

The reflection mirror unit 120 includes a reflection mirror 121 and a drive motor 122.

The driving motor 122 changes the angle and position of the reflecting mirror 121 and reflects the beam B to the portion of the powder P to be sintered.

The beam width adjusting unit 130 adjusts the width of the beam reflected from the reflective mirror unit 120 or adjusts the width of the beam emitted from the beam emitting unit 110. When the area of the powder P to be sintered is wide If the width of the beam is widened and the area of the powder P to be sintered is narrow, the width of the beam is narrowed.

As shown in FIG. 1, the beam width adjusting unit 130 is positioned after the reflection mirror unit 120. Of course, the beam width adjusting unit 130 may be positioned before the reflection mirror unit 120. [

Hereinafter, the beam width adjusting unit 130 is positioned after the beam reflecting mirror unit 120 will be described as an example.

2, the beam adjusting apparatus adjusts the angle and position of the reflecting mirror 121 (S12) according to the input drawing information S11, adjusts the position of the moving lens to adjust the beam width (S13 After controlling the beam intensity according to the beam width (S14), the powder is sintered (S15) by irradiating a beam to the powder portion to be sintered. These operations S12 to S15 are repeated to complete the product M (S16).

3 and 4, the beam width adjusting unit 130 includes a body 131, a lens unit 132, a lens moving unit 133, a body 132, And a moving unit (not shown).

The center of the body 131 is perforated so that the beam B can pass through. The body 131 is cylindrical or rectangular.

The lens unit 132 is composed of a diffusion lens 132a and a moving lens 132b. The diffusion lens 132a diffuses the beam. The moving lens 132b is positioned after the diffusing lens 132a. The moving lens 132b moves up and down in the inside of the body 131. [ In this embodiment, the diffusing lens 132a is a concave lens and the moving lens 132b is a convex lens.

Of course, the lens unit 132 may be composed of more lenses besides the diffusing lens 132a and the moving lens 132b. The diffusion lens 132a may be fixedly installed inside the body 131, or may be replaceably installed.

The lens moving part 133 moves the moving lens 132b up and down.

The lens moving section 133 is constituted by a linear motor block 133a and a linear motor rail 133b.

And is connected to the moving lens 132b to the linear motor block 133a.

As the linear motor block 133a moves along the linear motor rail 133b, the moving lens 132b moves up and down.

Of course, if the movable lens 133 can be moved up and down, the lens moving part 133 can be variously modified.

As shown in Fig. 3, when the movable lens 132b moves upward, the beam width becomes narrow. If the beam width is narrowed, a narrow portion of the product M can be precisely sintered.

As shown in Fig. 4, when the moving lens 132b moves downward, the beam width is widened. If the beam width is widened, a large part of the product M can be rapidly sintered.

The body (not shown) moves in conjunction with the angle and position of the reflecting mirror 121 to move the body 131. The body part (not shown) can be configured in various ways using known techniques, so a detailed description thereof will be omitted.

On the other hand, the beam width controller 130 can be configured by replacing the movable lens 132b with the deformable lens 135b.

In this case, as shown in FIG. 5, the beam adjusting apparatus adjusts the angle and position of the reflecting mirror 121 (S22) according to the inputted drawing information S21, and adjusts the angle and position of the reflecting mirror 121 The shape is adjusted (S23), the beam intensity is adjusted according to the beam width (S24), and the powder is sintered (S25) by irradiating a beam to the powder portion to be sintered. These operations S22 to S25 are repeated to complete the product M (S26).

6 to 8, the beam width adjusting unit 130 includes a body 131, a lens unit 135, a lens shape changing unit 136, and a body part (not shown).

Since the trunk 131 and the trunk (not shown) have been described above, a description thereof will be omitted.

The lens unit 135 is composed of a diffusion lens 135a and a deformable lens 135b. The diffusion lens 135a diffuses the beam. The deformed lens 135b is positioned after the diffusing lens 135a.

Of course, the lens unit 135 may be composed of more lenses besides the diffusion lens 135a and the deformable lens 135b. Further, the diffusion lens 132a and the deformable lens 135b may be fixedly installed inside the body 131, or may be installed interchangeably.

The lens shape changing portion 136 supplies electricity, fluid, electricity or fluid to the deformed lens 135b to change the shape of the deformed lens 135b to be flat, concave or convex. The deformable lens 135b whose shape is freely changed can be selected from the following lens groups.

-next-

. Flexible Oil Filled Lens

     Fluid-Filled Lens

     · Electrowetting Lens

     · Electroactive Lens

     · Variable-Focus Terahertz Lens

     Variable-Focus Lens with 1-kHz Bandwidth

As shown in Fig. 6, when the shape of the deformable lens 135b is flattened, the beam width is kept at a normal size. If the beam width is maintained at a normal size, a portion having a normal size of the product M can be rapidly sintered.

As shown in Fig. 7, when the shape of the deformed lens 135b is concave, the beam width is widened. If the beam width is widened, a large part of the product M can be rapidly sintered.

As shown in Fig. 8, when the shape of the deformable lens 135b changes convexly, the beam width becomes narrow. If the beam width is narrowed, a narrow portion of the product M can be precisely sintered.

The beam intensity adjusting unit 140 instructs the beam emitting unit 110 to increase the intensity of the beam when the width of the beam adjusted by the beam width adjusting unit 130 is wide. On the contrary, when the width of the beam adjusted by the beam width adjusting unit 130 is narrow, the beam emitting unit 110 is instructed to lower the intensity of the beam.

As a result, the product M having uniform sintering strength is produced because the beam intensity is the same regardless of the beam width.

1: 3D printer 100: beam adjuster
110: beam emitting part 120: reflection mirror part
130: beam width adjusting unit 131: body
132, 135: Lens parts 132a, 135a:
132b: Moving lens 135b:
133: lens moving section 136: lens shape changing section
140: beam intensity adjusting unit

Claims (5)

A beam emitter;
A reflecting mirror part for reflecting the beam emitted from the beam emitting part to a powder part to be sintered;
If the area of the powder to be sintered is large, the width of the beam is widened. If the area of the powder part to be sintered is narrow A beam width adjusting unit for narrowing the beam width; And
Wherein the control unit instructs the beam emitting unit to increase the intensity of the beam when the width of the beam adjusted by the beam width adjusting unit is wide and when the width of the beam adjusted by the beam width adjusting unit is narrow, And a beam intensity controller for controlling the beam intensity to be the same regardless of the beam width. The apparatus of claim 1, wherein the beam-
body;
A lens unit installed inside the body; And
The moving lens constituting the lens unit is moved up and down to widen the beam width passing through the moving lens when the area of the powder part to be sintered is wide and to narrow the beam width passing through the moving lens when the area of the powder part to be sintered is narrow And a lens moving section. The apparatus according to claim 2,
Consisting of a linear motor block and a linear motor rail,
Wherein the linear motor block is connected to a moving lens,
Wherein the linear motor block moves along the linear motor rail to widen or narrow the width of the beam passing through the moving lens. The apparatus of claim 1, wherein the beam-
body;
A lens unit installed inside the body; And
When the area of the powder portion to be sintered is changed by changing the shape of the deformable lens constituting the lens portion, the beam width passing through the deformed lens is widened. When the area of the powder portion to be sintered is narrowed, And a lens shape changing unit for changing the shape of the 3D printer beam. 5. The method of claim 4,
In the deformed lens,
Fluid-Filled Lens, Electrowetting Lens, Electroactive Lens, Variable-Focus Terahertz Lens, Variable-Focus Lens with 1-kHz Bandwidth,
Wherein the lens shape changing unit supplies electricity, fluid, electricity, and fluid to the deformed lens to widen or narrow the beam width passing through the deformed lens.
KR1020150130689A 2015-09-16 2015-09-16 Apparatus for controlling width and power of beam using in three dimensional printer KR101676738B1 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190024262A (en) 2017-08-31 2019-03-08 주식회사 디이엔티 Method and method for adjusting laser beam size in metal 3d printer
JP2019171854A (en) * 2018-03-29 2019-10-10 ゼロックス コーポレイションＸｅｒｏｘ Ｃｏｒｐｏｒａｔｉｏｎ System and method for forming nanostructure on substrate to provide predetermined physical characteristics to substrate
KR20200094828A (en) 2019-01-22 2020-08-10 주식회사 디이엔티 Laser head optical axis distance adjustment device of metal 3D printer
KR102236755B1 (en) * 2019-12-12 2021-04-06 한국광기술원 Apparatus for 3D Printing that Improved Manufacturing Precision
KR102250986B1 (en) 2020-02-25 2021-05-14 주식회사 디이엔티 Laser head of nozzle unit for 3D printer
KR20210089042A (en) 2020-01-07 2021-07-15 주식회사 디이엔티 Apparatus and method for controlling the nozzle unit of a 3D printer
KR20220073435A (en) 2020-11-26 2022-06-03 주식회사 디이엔티 Laser head for 3d printer
KR20220074068A (en) 2020-11-27 2022-06-03 주식회사 디이엔티 Chamber and 3d printer with the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010089364A (en) * 2008-10-07 2010-04-22 Roland Dg Corp Three-dimensional shaping apparatus
KR20130013490A (en) * 2011-07-28 2013-02-06 주식회사 씨에이텍 Rapid prototyping using beam-scanning by visible light and lcd mask
KR20140140782A (en) * 2013-05-30 2014-12-10 서울과학기술대학교 산학협력단 Three dimensional printer and three dimensional printing method
KR101498679B1 (en) 2013-11-26 2015-03-11 정재석 3-D printing head using an electron gun and the resulting 3-D printer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010089364A (en) * 2008-10-07 2010-04-22 Roland Dg Corp Three-dimensional shaping apparatus
KR20130013490A (en) * 2011-07-28 2013-02-06 주식회사 씨에이텍 Rapid prototyping using beam-scanning by visible light and lcd mask
KR20140140782A (en) * 2013-05-30 2014-12-10 서울과학기술대학교 산학협력단 Three dimensional printer and three dimensional printing method
KR101498679B1 (en) 2013-11-26 2015-03-11 정재석 3-D printing head using an electron gun and the resulting 3-D printer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190024262A (en) 2017-08-31 2019-03-08 주식회사 디이엔티 Method and method for adjusting laser beam size in metal 3d printer
JP2019171854A (en) * 2018-03-29 2019-10-10 ゼロックス コーポレイションＸｅｒｏｘ Ｃｏｒｐｏｒａｔｉｏｎ System and method for forming nanostructure on substrate to provide predetermined physical characteristics to substrate
JP7096782B2 (en) 2018-03-29 2022-07-06 ゼロックス コーポレイション Systems and methods for forming nanostructures on a substrate to give it a given physical property
KR20200094828A (en) 2019-01-22 2020-08-10 주식회사 디이엔티 Laser head optical axis distance adjustment device of metal 3D printer
KR102236755B1 (en) * 2019-12-12 2021-04-06 한국광기술원 Apparatus for 3D Printing that Improved Manufacturing Precision
KR20210089042A (en) 2020-01-07 2021-07-15 주식회사 디이엔티 Apparatus and method for controlling the nozzle unit of a 3D printer
KR102250986B1 (en) 2020-02-25 2021-05-14 주식회사 디이엔티 Laser head of nozzle unit for 3D printer
KR20220073435A (en) 2020-11-26 2022-06-03 주식회사 디이엔티 Laser head for 3d printer
KR20220074068A (en) 2020-11-27 2022-06-03 주식회사 디이엔티 Chamber and 3d printer with the same

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