JP-7856507-B2 - Three-dimensional additive manufacturing apparatus and powder leveling member

JP7856507B2JP 7856507 B2JP7856507 B2JP 7856507B2JP-7856507-B2

Inventors

成瀬達雄
津田貴
稲永尊也
清水崇行
阿部浩二

Assignees

日本電子株式会社

Dates

Publication Date: 20260511
Application Date: 20220627

Claims (4)

A three-dimensional additive manufacturing apparatus comprising a base plate and a powder leveling member for leveling the powder supplied onto the base plate to form a powder layer, The aforementioned powder leveling member is A squeegee made by stacking multiple comb-shaped leveling plates, each having multiple alignment holes, with the alignment holes overlapping, The arm comprises a plurality of positioning pins that are fitted into the aforementioned overlapping alignment holes, The aforementioned plurality of alignment holes are A first alignment hole for aligning the comb teeth in the alignment direction of the leveling plate , Alignment holes for aligning the comb teeth in a direction perpendicular to the arrangement direction, and second alignment holes arranged on both sides of the first alignment hole, having an elongated opening shape in the direction of the arrangement direction of the comb teeth , The first alignment hole has an elongated opening shape in a direction perpendicular to the arrangement direction of the comb teeth, The aforementioned multiple leveling plates are arranged so that the comb teeth of adjacent leveling plates close the slits between the comb teeth. Three-dimensional additive manufacturing device.
The three-dimensional additive manufacturing apparatus according to claim 1, wherein the first alignment hole is provided in the center of the arrangement direction of the comb teeth on the leveling plate.
The three-dimensional additive manufacturing apparatus according to claim 1, wherein the second alignment holes are provided at both ends of the leveling plate in the direction of arrangement of the comb teeth.
A powder leveling member for leveling powder and forming a powder layer, The squeegee comprises a comb-shaped leveling plate having multiple alignment holes, with multiple plates stacked with the alignment holes overlapping, and an arm having multiple positioning pins that are fitted into the overlapping alignment holes. The aforementioned plurality of alignment holes are A first alignment hole for aligning the comb teeth in the alignment direction of the leveling plate , Alignment holes for aligning the comb teeth in a direction perpendicular to the arrangement direction, and second alignment holes arranged on both sides of the first alignment hole, having an elongated opening shape in the direction of the arrangement direction of the comb teeth , The first alignment hole has an elongated opening shape in a direction perpendicular to the arrangement direction of the comb teeth, The aforementioned multiple leveling plates are arranged so that the comb teeth of adjacent leveling plates close the slits between the comb teeth. Powder leveling component.

Description

This invention relates to a three-dimensional additive manufacturing apparatus and a powder leveling member. One known three-dimensional additive manufacturing technology is the powder bed method. This method involves supplying new powder material onto a previously formed hardened layer and unhardened powder material. A width plate-shaped regulating member, which crosses the build frame, is moved horizontally at a position slightly higher than the build frame to regulate the height of the powder material, forming a layer of powder material with a uniform thickness. Next, an electron beam or laser is irradiated onto the surface of the formed powder material layer. This melts all or part of the powder material, bonding the powder materials together to form a hardened layer, and also integrates the newly formed hardened layer with the hardened layer stacked below. By repeating this hardened layer formation process, a three-dimensional additive manufactured body can be obtained in which multiple hardened layers with a predetermined pattern shape are stacked (see Patent Document 1 below). Japanese Patent Publication No. 2001-152204 This is a schematic diagram of a three-dimensional additive manufacturing apparatus according to an embodiment of this invention.This is a schematic diagram of the powder leveling member according to the embodiment.This is an exploded perspective view of the squeegee that constitutes the powder leveling member according to the embodiment.This is a plan view of the leveling plate that constitutes the squeegee according to the embodiment.This diagram shows the deflection of the arms that make up the powder leveling member.This diagram illustrates the problems of comparative examples compared to the embodiments. ≪Three-dimensional additive manufacturing equipment≫ Figure 1 is a schematic diagram of a three-dimensional additive manufacturing apparatus 1 according to an embodiment. The three-dimensional additive manufacturing apparatus 1 shown in Figure 1 is a powder bed type three-dimensional additive manufacturing apparatus 1, and includes a forming tank 11, a base plate 12, a powder supply device 13, a powder leveling member 14, a rail member 15, a dust box 16, and an energy ray irradiation unit 17 within a reduced pressure chamber 10. The three-dimensional additive manufacturing apparatus 1 also includes a control unit 18 and an input unit 19 for controlling the drive unit among these components. The components constituting the three-dimensional additive manufacturing apparatus 1 will be described below. <Formation tank 11> The forming tank 11 is a cylindrical structure erected within the reduced pressure chamber 10, and a three-dimensional additively fabricated object is formed inside the cylindrical structure. The cylindrical structure constituting the forming tank 11 is, for example, cylindrical. Such a forming tank 11 is equipped with a flange-shaped table 11a that extends from the periphery of the upper opening toward the outer circumference. <Base plate 12> The base plate 12 is provided in contact with the inner circumferential wall of the forming tank 11 and constitutes the bottom surface of the forming tank 11. A flexible seal 12a is placed in the gap between the inner circumferential wall of the forming tank 11 and the edge of the base plate 12, ensuring the sliding and airtightness of the base plate 12 within the forming tank 11. Powder 100 is stored inside the forming tank 11, whose bottom surface is formed by the base plate 12, and powder layers, each made by stacking the powder 100 to a predetermined thickness, are sequentially stacked. Furthermore, the base plate 12 includes a base plate drive unit 12b. The base plate drive unit 12b controls the raising and lowering of the base plate 12 within the forming chamber 11, thereby making the depth of the forming chamber 11 variable. This base plate drive unit 12b is connected to the control unit 18, and raises and lowers the base plate 12 based on instructions from the control unit 18. <Powder supply device 13> The powder supply device 13 supplies powder 100 to the top of the table 11a. This powder supply device 13 comprises a powder tank 13a and a quantitative dispenser 13b connected to the bottom of the powder tank 13a, and supplies a predetermined amount of powder 100 onto the table 11a from a powder outlet 13c provided in the quantitative dispenser 13b. The powder supply device 13 supplies a predetermined amount of powder 100 in a line extending across the upper opening of the forming tank 11, near the starting position [ps] set near one edge of the table 11a, and on the upper opening side of the forming tank 11 from the starting position [ps]. This supply of powder 100 by the powder supply device 13 is carried out by instructions from the control unit 18. The starting position [ps] is the position where the powder leveling member 14, which will be described next, begins to move. <Powder leveling member 14> The powder level