KR102157874B1 - Power feeding device for metal additive manufacturing process using a plasma electron beam - Google Patents

Abstract

The present invention relates to a powder feeding device for a metal stacking process using a plasma electron beam and, more specifically, to a powder feeding device for a metal stacking process using a plasma electron beam, which can easily transfer raw material powder to a stacking plate and easily form a powder layer for a process of sintering or melting a powder layer with a plasma electron beam, can increase powder coating characteristics, and can monitor the plasma electron beam during the process. According to the present invention, the powder feeding device for a metal stacking process using a plasma electron beam can increase the efficiency of a stacking process by performing, as a series of processes, adjustment of the height of the stacking plate, supply of the raw material powder, and formation of the powder layer and can collect the raw material powder falling between a powder layer formation hole and the stacking plate, thereby being economical and increasing management efficiency. In addition, the powder feeding device for a metal stacking process using a plasma electron beam can evenly spread the raw material powder by blades moved together with a sliding transfer unit while easily transferring the raw material powder and easily forming the powder layer, thereby increasing the straightness of the powder and obtaining the powder layer having a uniform density. The powder feeding device for a metal stacking process using a plasma electron beam can increase the reliability of the processes by monitoring the plasma beam during a metal stacking process so that a plasma beam having conditions suitable for sintering or melting of the powder layer is emitted. The powder feeding device includes a unit for monitoring a plasma electron beam.

Description

Powder supply device for metal additive manufacturing process using a plasma electron beam

The present invention relates to a powder supply device for a metal lamination manufacturing process using a plasma electron beam, and more particularly, a plasma electron beam during the process while transferring raw material powder and forming a powder layer to a lamination plate for a powder layer sintering or melting process using a plasma electron beam. It relates to a powder supply device for a metal additive manufacturing process using a plasma electron beam capable of monitoring.

The additive manufacturing process is widely used in various fields such as the mold industry, the construction industry, and the aviation industry, and recently, engineering education using it has also been conducted, and the demand for technology is increasing day by day. The additive manufacturing process is typically an extrusion process (Material Extrusion), a material jetting process (Material Jetting), a binder jetting process (Binder Jetting), a sheet lamination process (Sheet Lamination), a container photopolymerization process (Vat Photopolymerization), a powder bed melting process ( Power Bed Fusion) and Directed Energy Deposition.

In the additive manufacturing process, the powder bed melting process is a process of fusing powders using one or a plurality of heat sources. Various heat sources can be applied to the powder bed melting process, but laser beam and electron beam heat sources are most widely used.

On the other hand, the powder supplying device is a so-called "powder bed system", and is a device that supplies powder to the additive manufacturing process. Representative lamination processes using a powder supply device may include a selective laser sintering (SLS) process, a selective laser melting (SLM) process, and an electron beam melting (EBM) process. have.

In general, in the additive manufacturing process, a component having good mechanical properties can be manufactured by repeating the process layer-by-layer using powder. Specifically, a raw material such as a metal powder mixture is transferred and developed in a thin layer of, for example, 0.25 mm, and a high energy beam such as an electron beam or a laser is irradiated on the surface of the powder according to the shape of the component to be manufactured. Let these be bound together. As a result, a two-dimensional solid pattern corresponding to the cross-section of the part to be manufactured is formed. If the powder layer is stacked by repeating this process, it is possible to manufacture a three-dimensional part.

At this time, it is known that the mechanical properties of the finally completed part are greatly affected by the properties of the powder, the energy of the beam, and the means for supplying the powder. For example, the initial pores of the raw material powder may impair the mechanical properties of the product by leaving pores in the finished part, and a separate post-treatment process may be performed to control such pores.

In particular, the feed characteristics of the raw material powder largely depend on the design and configuration of the powder feed means, and conventionally, as such powder feed means, a rotating roller, a slot hopper, a scraper blade, and the like are generally employed.

In addition, the additive manufacturing process using the plasma electron beam heat source can produce a higher output faster than the laser heat source, so it can quickly melt the high melting point powder material, but in order to use the electron beam heat source, the vacuum environment must be rescued and occurs when the electron beam is used. The characteristics to be considered must be considered.

In order to solve the problem of the conventional powder coating layer, the applicant can disperse the initial frictional force generated between the raw material powders, as disclosed in Korean Patent Publication No. 10-1894371, and the uniformity of the coating layer, thickness accuracy, and A powder supply apparatus in which a blade having a multi-stage scraper capable of improving the density and reducing the amount of powder used has been developed.

In addition, the powder supply device as described above has been continuously researched and developed to improve the supply of raw material powder and the powder layer formation process in the metal stacked manufacturing process using plasma electron beams, while measuring the detection current and focusing rate of the electron beam during the process to A subsequent application for a powder supply device that can increase the reliability of the layer sintering or melting process has been reached.

Republic of Korea Patent Publication No. 10-2018-0074685: Additive processing system and method by laser melting of powder bed Republic of Korea Patent Publication No. 10-0796465: Apparatus and method for manufacturing a three-dimensional object US Patent No. 05786562: Method and apparatus for producing a three-dimensional body

The present invention has been invented to solve the above problems, and provides a powder supply device for a metal lamination manufacturing process using a plasma electron beam with improved powder transfer and coating properties while controlling the elevation of the laminate, supplying raw material powder, and forming a powder layer. I want to provide.

In addition, the present invention is to provide a powder supply device for a metal stack manufacturing process using a plasma electron beam that can increase the reliability of a powder layer sintering or melting process by monitoring a plasma electron beam during the additive manufacturing process.

A powder supply apparatus for a metal lamination manufacturing process using a plasma electron beam for achieving the above object comprises: a hopper through which raw material powder is supplied; A frame unit having an internal space and having a powder layer forming hole formed at an upper end thereof to form a powder laminated space in which the raw material powder is laminated to form a powder layer by stacking the raw material powder together with the laminated plate that is formed through the upper and lower portions; A blade for moving the raw material powder in one direction so that the raw material powder discharged from the hopper is transferred in one direction to form the powder layer on the laminate; A lifting unit mounted on one side of the inner space of the frame unit to lift the laminated plate; And a plasma electron beam monitoring unit that is mounted on the frame unit and monitors the plasma electron beam reaching the laminated plate in order to determine whether the irradiation condition of the plasma electron beam for sintering or melting the powder layer is satisfied.

The plasma electron beam monitoring unit is an internal space having an inner diameter larger than the width of the plasma electron beam and is opened upward so that the plasma electron beam irradiated from the electron gun located above the frame unit is received and current is formed in the connected electric circuit. An electron beam detection current measuring unit that measures the detection current of the plasma electron beam including a first Faraday cage formed therein; an upper cover portion formed of an insulator through which the center side passes so that only the center side of the plasma electron beam passes; and the upper cover A lower cover part supporting the part and having an internal space open upward, and a beam receiving part formed of a conductor to form a current in the connected electric circuit by receiving the plasma electron beam received in the lower cover part and passing through the upper cover part. An electron beam profile measuring unit that measures the profile of the plasma electron beam including a second Faraday cage including, and a high melting point specimen formed of a solid solution point metal capable of withstanding the temperature of the focused plasma electron beam, and collecting the plasma electron beam It is preferable to include an electron beam focusing speed measuring unit that measures the speed.

In the powder supply apparatus for a metal stacked manufacturing process using a plasma electron beam of the present invention, the hopper mounted on the upper portion of the frame unit is moved adjacent to the powder stacked space to supply the raw material powder to the powder stacked space. A sliding transfer unit that slides with respect to the frame unit to separate the hopper from the powder stacking space for a sintering or melting process by the plasma electron beam after forming the powder layer; A hopper opening/closing unit mounted on the upper part of the sliding transfer unit to open and close the powder supply hole formed at the lower end of the hopper, wherein the blade is mounted on the upper part of the sliding transfer unit to be spaced apart from the powder supply hole. desirable.

The sliding transfer unit extends in the longitudinal direction of the frame unit in the inner space of the frame unit and has a first rotation shaft which is rotatable by connecting a first motor to one end, and is penetrated to the first rotation shaft to form the first rotation shaft. A horizontal moving member that moves in one or the other direction in the longitudinal direction of the first rotation axis according to the rotation direction, a horizontal extension plate coupled with the horizontal moving member and extending in the width direction of the frame unit, and each lower part of the It is coupled to both sides in the width direction of the horizontal extension plate and extends in the vertical direction, penetrates into a position spaced apart from each other in the width direction of the frame unit with the powder layer forming hole formed on the upper end of the frame unit, and extends in the length direction A hopper that connects the top of each of the plurality of vertical extension plates extending through the plurality of moving guide holes respectively, and the plurality of upper and lower extension plates each passing through the movement guide hole at a corresponding position to form a hopper seating space. It is preferable to have a seating unit.

In the powder supply device for a metal lamination manufacturing process using a plasma electron beam of the present invention, the height of the lamination plate, the supply of raw material powder, and the powder layer formation can be made in a series of processes, so that lamination process efficiency can be improved, and between the powder layer forming hole and the lamination plate. It is possible to collect falling raw material powder, so it is economical and has the advantage of increasing management efficiency.

In addition, the powder supply device for the metal stacked manufacturing process using the plasma electron beam of the present invention facilitates the transfer of the raw material powder and the formation of the powder layer, and the raw material powder can be spread evenly and unfolded by the blade moving together with the sliding transfer unit. In addition to improving the straightness, there is an effect of obtaining a powder layer having a uniform density.

In addition, in the powder supply device for a metal stacked manufacturing process using a plasma electron beam of the present invention, the raw material powder flowing into the powder supporting member can be stored as a powder storage member along the inclined surface of the raw material powder storage groove without a separate process. There is an advantage of easy powder management.

The powder supply device for a metal lamination manufacturing process using a plasma electron beam of the present invention can monitor the plasma beam during the metal lamination manufacturing process so that plasma electron beams in conditions suitable for sintering or melting the powder layer can be irradiated, thereby increasing the reliability of the process. .

1 is a perspective view of a powder supply apparatus for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention,
Figure 2 is a right side view of the powder supply device of Figure 1,
3 is a left side view of the powder supply device of FIG. 1,
4 is a partially cut-away perspective view of the powder supply device of FIG. 1,
5 is a side cross-sectional view of the powder supply device of FIG. 1,
6 is a side cross-sectional view showing a state in which the powder supply unit of the powder supply device of FIG. 1 has been moved to the laminate,
7 is a partially enlarged view showing a state in which a powder layer is formed on a laminate by transferring raw material powder in one direction by the blade of FIG. 5,
8 is a block diagram of a plasma beam monitoring unit of a powder supply device,
9 is a partial cross-sectional side view of a powder supply apparatus for a metal additive manufacturing process using a plasma electron beam according to another embodiment of the present invention.

Hereinafter, a powder supply apparatus for a metal lamination manufacturing process using a plasma electron beam according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention supplies metal raw material powder to the lamination process of a powder bed system to provide a high energy beam mechanism of the powder bed system. It is applied to form a powder layer (L) into a beam section (S) formed by irradiating a plasma electron beam (B) from the phosphorus gun 6. The electron gun 6 irradiates a plasma electron beam to the powder layer L formed on the laminated plate 79 of the powder supply device 1 according to the present invention to sinter or melt the powder layer.

Referring to FIGS. 1 to 8, a powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention includes a hopper 30 to which raw material powder P is supplied; Powder that has an internal space, is formed through the top, and is opened upward with the laminated plate 79 that rises and descends in the internal space, and the raw material powder is laminated to form a powder laminated space 19 in which a powder layer (L) is formed. A frame unit (10) having a layer forming hole (16); In order to supply the raw material powder (P) to the powder stacking space (19), the hopper 30 mounted on the top is moved to the powder stacking space (19), or after the powder layer (L) is formed in the powder stacking space (19). A sliding transfer unit 40 sliding with respect to the frame unit 10 while separating the hopper 30 from the powder stacking space 19 for a sintering or melting process; A lifting unit 80 mounted on one side of the inner space of the frame unit 10 to lift the laminated plate 79; A hopper opening/closing unit 80 mounted on the upper part of the sliding transfer unit 40 to open and close the powder supply hole 31 formed at the lower end of the hopper 30; A multi-stage scraper (36, 38) is provided in one direction to form the powder layer by transferring the raw material powder discharged from the hopper 30 in one direction by being mounted on the upper part of the sliding transfer unit 40 to be spaced apart from the hopper 30. It has a blade 35;

Further, the powder supply device 1 according to an embodiment of the present invention is mounted on the frame unit 10 and determines whether the irradiation condition of the plasma electron beam (not shown) for sintering or melting the powder layer L is satisfied. For this purpose, a plasma electron beam monitoring unit 150 and a control unit 180 for monitoring plasma electron beams reaching the laminated plate 79 are provided.

The hopper 30 is moved to the powder stacking space 19 of the frame unit 10 by the sliding transfer unit 40, and feeds the raw material powder P into the powder stacking space 19 through the powder supply hole 31. Supply.

The frame unit 10 has an internal space, and is formed through the top, and the upper side is opened together with the laminated plate 79 that rises and descends within the internal space, and the raw material powder P is stacked to form a powder layer L. It has a powder layer forming opening 16 forming the stacking space 19.

1 to 4, the frame unit 10 is mounted on the upper ends of the square-shaped base plate 11 and both sides of the base plate 11 in the width direction, spaced apart from each other, extending in the vertical direction, and the base plate ( 11) A plurality of top plate support frames 13 that are parallel to each other in the longitudinal direction, and both sides in the width direction are supported on each upper end of the plurality of top plate support frames 13 and extend parallel to the base plate 11, and a powder layer on one side The upper plate 15 on which the forming opening 16 is formed, the lifting unit support plate 20 supporting the lifting unit 80 to be described later in the inner space, and each side of the plurality of upper plate support frames 13 are connected, and the lifting unit The first support plate frame 21 supporting one side of the support plate 20 and each other side of the plurality of upper plate support frames 13 are connected, and the other side of the lifting unit support plate 20 is supported, and the sliding transfer unit 40 It includes a second support plate frame 24 through which the first rotation shaft 41 passes.

The upper plate 15 penetrates in the vertical direction on both sides of the width direction and extends parallel to each other in the length direction, thereby forming a plurality of movement guide holes 17 in which the powder layer forming holes 16 are positioned therebetween. And, the powder layer forming sphere 16 is formed through the penetrating area so as to increase downwardly.

The sliding transfer unit 40 includes a first rotation shaft 41, a first motor 43, a horizontal moving member 46, a horizontal extension plate 47, a plurality of vertical extension plates 50, A plurality of movement support units 52 and a hopper seating unit 56 are provided.

The first rotation shaft 41 extends in the longitudinal direction of the frame unit 10 under the inner space of the frame unit 10, one end is rotatably supported by the bracket 42, and the first motor 43 is connected to the other end. And rotates clockwise or counterclockwise. Referring to FIG. 4, the first rotation shaft 41 passes through the second support plate frame 24, and between the base plate 11 and the lift unit support plate 20, the base plate 11 and the lift unit support plate 20 It extends side by side.

The horizontal movable member 46 is screwed while the first rotation shaft 41 penetrates and is positioned between the base plate 11 and the lifting unit support plate 20, and the first rotation shaft according to the rotation direction of the first rotation shaft 41 It is moved in one or the other direction in the longitudinal direction of (41).

The horizontal extension plate 47 is coupled to the horizontal moving member 46 and extends in the width direction of the base plate 11 but extends to a greater width than the lifting unit support plate 20.

Each of the plurality of vertical extension moving plates 50 is seated on upper ends of both sides of the horizontal extension moving plate 47 in the width direction and coupled to each other. The plurality of vertical extension moving plates 50 have a width parallel to the length direction of the upper plate 15 and the base plate 11 and extend in the vertical direction, but the movement guide holes 17 spaced apart from each other in the width direction of the upper plate 15 Each penetrates.

The plurality of movement support units 52 support both sides of the horizontal extension plate 47 that are spaced apart from each other in the width direction of the frame unit 10 so that the first rotation shaft 41 is positioned therebetween. The plurality of movement support units 52 extend parallel to the first rotation shaft 41 and move in the longitudinal direction of the rail 53 by being seated on the rail 53 and mounted on the base plate 11 and the rail 52 It is possible and includes a slider 54 supporting one side or the other side in the longitudinal direction of the horizontal extension plate 47.

The hopper seating unit 56 connects the upper portions of each of the plurality of vertical extension plates 50 each passing through the movement guide hole 17 at a corresponding position to form a hopper seating space 55. The hopper seating unit 56 includes a plurality of advancing and retreating space forming members 57, a first hopper supporting member 61, and a second hopper supporting member 65.

The plurality of advance and retreat space forming members 57 are mounted to face the upper ends of the plurality of vertical extension moving plates 50 and are spaced apart from each other. The plurality of advance and retreat space forming members 57 are spaced apart from each other to form an advance and retreat space 60 in which the hopper opening/closing unit 70 can advance and retreat in the longitudinal direction of the frame unit 10 under the hopper 30. The plurality of advancing and retreating space forming members 57 extend in the longitudinal direction of the upper plate 15, but one side adjacent to the powder supply hole 31 of the hopper 30 has a larger width than the other side so that the blade 35 mounting space is formed. It is formed stepwise.

The first hopper support member 61 is a plate shape that extends in the width direction of the frame unit 10 and has a width in the vertical direction, and is coupled to one end of a plurality of advance and retreat space forming members 57 to form a plurality of advance and retreat spaces. The member 57 is connected. In addition, the first hopper support member 61 supports the hopper 30 while in contact with a vertical surface formed on one side of the hopper 30.

The second hopper support member 65 extends in the width direction of the frame unit 10 and moves away from the powder layer forming opening 16 in the length direction of the frame unit 10 with respect to the first hopper support member 61. Both sides are coupled to the plurality of advancing and retreating space forming members 57 to be spaced apart. The second hopper support member 65 extends in the width direction of the upper plate and supports the inclined surface 33 of the hopper 30, but a hopper inclined surface having a contact surface 67 in which the surface in contact with the inclined surface 30 is parallel to the inclined surface 30 The first and second vertical extensions 68 and 69 each extending vertically from both ends of the support 66 and the hopper inclined surface support 66 so as to be parallel to each other and coupled with a plurality of advancing and retreating space forming members 57, respectively. ).

Further, although not specifically shown, the sliding transfer unit 40 may include a first reducer 45 gear-connected between the first rotation shaft 41 and the drive shaft 44 of the second motor 43.

The blade 35 mounted between the plurality of advancing and retreating space forming members 57 includes at least two scrapers 36 and 38 having a cross section of a blade shape.

A plurality of scrapers (36, 38) are each mounted on a plurality of advance and retreat space forming member (57), the opening and closing member is accommodated in the upper so that the blade portion can be located below the horizontal portion (72) of the opening member (71). A groove that is retractably retracted is formed.

The plurality of scrapers (36, 38) directly contact the raw material powder (P) supplied from the hopper (30) by the sliding transfer unit (40) and transfer to the powder layer forming port (16), and at the same time, the raw material powder (P) ) To form a uniform powder layer (L).

It is preferable that the front surfaces of the scrapers 36 and 38 in contact with the raw material powder P are formed to be inclined, and at this time, the inclination may be appropriately adjusted as necessary.

According to the present invention, in at least two or more scrapers 36 and 38, the lower end of the first scraper 36 positioned in the front is installed to be positioned higher than the lower end of the second scraper 38 positioned in the rear thereof. In other words, it is mounted on the advance and retreat space forming member 57 so that a predetermined height difference is formed between the lower end of the first scraper 36 and the lower end of the second scraper 38.

When the blade 35 having a multi-stage scraper pushes and transports the raw material powder P, the raw material powder P sequentially contacts the first and second scrapers 36 and 38, and according to this process, the conventional Compared to a single scraper blade, the friction force can be dispersed. In particular, the first scraper 36 that first comes into contact with the raw material powder P transfers the powder P located in the upper layer, and then the second scraper 38 that follows is the powder remaining in the lower layer relatively ( Since P) is brought into contact and conveyed, the friction force can be significantly dispersed and reduced compared to a conventional single scraper blade that directly contacts the entire heap of powder. According to the present invention, the separation distance between the first scraper 36 and the second scraper 38 is preferably set in the range of 1 mm to 5 mm, but is not particularly limited by this range.

The hopper opening/closing unit 70 includes an opening/closing member 71 extending between the advancing and retreating space 60, a third rotating shaft 74 and a third rotating shaft 74 that are coupled with the opening and closing member 71 to move the opening and closing member. It includes a third motor 75 to rotate.

The opening and closing member 71 is a horizontal portion 72 that extends between the advancing and retreating space forming members spaced apart from each other, and the powder layer is formed with respect to the second hopper support member 65 by extending vertically from the end of the horizontal portion 72 It has a vertical portion (73) spaced apart in a direction away from the sphere (16).

The third rotation shaft 74 is screwed to the vertical portion 73 to move the opening/closing member 71 to be located below the powder supply hole 31 or out of the downward direction according to the rotation direction.

The third motor 75 has both sides coupled to each upper end of the plurality of vertical extension plates 50 and coupled to the motor support frame 77 through which the third rotation shaft 74 passes.

The hopper opening/closing unit 70 extends in parallel with the third rotation shaft 74 from the vertical portion 73 of the opening/closing member 71 to penetrate the motor support frame 77, and a plurality of opening/closing member moving guide bars ( 76), and the opening and closing member moving guide 76 through the inside, and a plurality of position restoration springs 78 supported by the motor support frame 77 and the vertical portion 73 on both sides may be further provided. After the plurality of position restoration springs 78 retreat in the direction away from the hopper 30 by the rotation of the third rotation shaft 74 so that the powder supply hole 31 of the hopper 30 is opened, When the driving of the third motor 75 is stopped, the opening member 71 elastically supports the opening member 71 so that the powder supply hole 31 of the hopper 30 is closed.

The elevating unit 80 extends in the vertical direction in the internal space of the frame unit 10 and is rotatably supported on the upper plate 11 and the second rotary shaft 81 is mounted on the elevating unit support plate 20 to A second motor 84 connected to the 81, an up-and-down member 87 that is mounted through the second rotation shaft 81 and moves up and down according to the rotation direction of the second rotation shaft 81, and the lower side of the powder layer forming hole A powder support member 94 having a raw material powder deposition groove 95 in which the raw material powder falling between the powder layer formation holes and the raw material powder deposition groove 95 is formed, and is vertically positioned from the center of the raw material powder deposition groove 95 It extends to and includes a laminated plate support member 97 on which the laminated plate 79 is mounted. Further, the lifting unit 80 is not specifically shown, but may include a second reducer 86 geared between the second rotation shaft 81 and the drive shaft 85 of the second motor 84.

In the powder support member 94, the raw material powder deposition groove 95 is larger than the cross-sectional area of the powder layer formation hole 16 so that the raw material powder P falling between the powder layer forming hole 16 and the laminated plate 79 can be well received. It is formed in the downward direction.

The vertical moving member 87 is coupled to the main shanghai east part 88 through which the second rotation shaft 81 passes, and the side of the main shanghai east part 88 to support the powder supporting member 94 ( 89).

Referring to FIG. 5, the main upper east part 88 is a first member 88a through which the second rotation shaft 81 is screwed, and the first member 88a penetrates through the first member 88a. And a second member 88b to which the powder support member coupling portion 89 is coupled, and the outer diameter of is supported on the expanded lower portion. Unlike shown, in the main upper part 88, the first member and the second member may be integrally formed without distinction.

The laminated plate support member 97 preferably has a diameter smaller than the width of the laminated plate 79 and is formed in a circular shape.

And, the lifting unit 80 extends vertically in parallel with the second rotation shaft 81 so that the upper end is supported by the upper plate 15, and the lower end is the lifting unit support plate 20 to accommodate and support the second reducer 86. It is supported on the reduction gear housing 25 mounted on the upper end of the, and may be provided with a plurality of lifting guide bars 91 passing through the main shanghai east part 88.

The plurality of elevating guide bars 91 are spaced apart in the width direction of the frame unit 10 to guide the vertical movement member 87 with respect to the second rotation axis to elevate in the same vertical line when elevating.

The laminated plate 79 may be lifted up and down in the powder layer forming sphere 16 by the lifting unit 80 described above. Accordingly, the powder layer L formed on the upper surface of the laminated plate 79 is sintered by the irradiated plasma electron beam, so that a desired target product (not shown) can be manufactured three-dimensionally.

Meanwhile, the plasma electron beam monitoring unit 150 is mounted on the left side of the frame unit 10. In order to irradiate the plasma electron beam to the plasma electron beam monitoring unit 150, the frame unit 10 may be moved in position along the X and Y axes, or the electronic gun 6 may be applied to the plasma electron beam while the frame unit 10 is fixed. It may be applied to be moved to the electron beam monitoring unit 150 side.

2 and 8, the plasma electron beam monitoring unit 150 includes an electron beam detection current measurement unit 151, an electron beam profile measurement unit 161, and an electron beam focusing rate measurement unit 171, and a control unit ( 180).

In addition, the plasma electron beam monitoring unit 150 extends in the vertical direction and is coupled to the upper plate support frame 13 of the frame unit 10, a vertical extension plate 181, and an upper plate support frame on the upper portion of the vertical extension plate 181. It is connected to the first horizontal extension plate 183 on which the electron beam detection current measuring unit 151 is mounted, and is connected to the upper plate support frame 13 and the vertical extension plate 181, extending horizontally in a direction away from (13). An electron beam profile measurement unit 161 and a second horizontal extension plate 186 on which the electron beam focusing speed measurement unit 171 are mounted are provided in parallel with the horizontal extension plate 183 in a horizontal direction.

The electron beam detection current measuring unit 151 is opened upward so that the plasma electron beam irradiated from the electron gun located above the frame unit 10 is received inside and a current is formed in the connected first electrical circuit (not shown). It includes a first Faraday cage 152 in which an inner space 154 having an inner diameter larger than the width of the plasma electron beam is formed.

The first Faraday cage 152 forms an internal space 154 for receiving a plasma electron beam, and is formed of a first beam receiving cup 153 electrically connected to the first electric circuit, and a first beam receiving cup ( It includes a housing 156 that surrounds the outside of the 153 and opens upward. The first beam receiving cup 153 is formed of a conductive material such as copper, so that a current is induced when the plasma electron beam strikes. The electron beam detection current measuring unit 151 measures a current induced in the first beam receiving cup 153 of the first Faraday cage 152 and transfers the measured current to the controller 180 (not shown). It is equipped with.

In order to measure the plasma electron beam profile, the electron beam profile measuring unit 161 includes an upper cover part 163 formed of an insulator and an upper cover part 163 having a beam through hole 164 penetrating through the center side so that only the center side of the plasma electron beam passes through. A second electricity that supports 163 and has a lower cover part 166 having an inner space open upward, and a plasma electron beam received in the lower cover part 166 and passing through the upper cover part 163 is received and connected It includes a second Faraday cage 162 including a second beam receiving cup 169 formed of a conductor such that a current is formed in the circuit. The upper cover portion 163 and the lower cover portion 166 are formed of an insulator, and the second beam receiving cup 169 is formed of a conductive material such as copper, and current is induced by the received plasma electron beam. In addition, the beam through hole 164 of the upper cover part 163 is formed stepped so that the inner diameter expands in the direction of the second beam receiving cup 169 and penetrates so that the inner diameter gradually increases as the inner diameter goes downward from the expanded end. Is formed.

The electron beam profile measuring unit 161 includes a second ammeter (not shown) that measures a current value induced by the plasma electron beam passing through the beam through hole 164 and transfers the measured current to the controller 180.

The controller 180 transmits the current value transmitted to the second ammeter to the display unit 185 to be described later, or is applied to calculate the plasma electron beam profile as a set size value through the transmitted current value, and the display unit to be described later ( 185) can be applied to deliver the calculated value.

The electron beam focusing rate measuring unit 171 is connected to a high melting point specimen 172 made of a solid solution point metal such as tungsten that can withstand the focused plasma electron beam and a high melting point specimen 172 to be focused on the high melting point specimen 172 A temperature measurement unit (not shown) that measures the temperature change of the high melting point specimen 172 when irradiated with the plasma electron beam is transmitted to the controller 180 is provided.

Meanwhile, the powder supply device 1 may include a display unit 185 connected to the controller 180 to display the detection current, the focusing rate, and profile information of the plasma electron beam measured by the plasma electron beam monitoring unit 150. .

The display unit 185 includes a current value transmitted from the first ammeter transmitted from the controller 180, a current value transmitted from the second ammeter, or a profile calculated value transmitted from the controller, and a high melting point specimen transmitted from the temperature measuring unit. (172) temperature information is displayed.

In this way, the user can monitor the plasma electron beam through the information obtained from the plasma electron beam monitoring unit 150, so that the powder supply device 1 can increase the reliability of the sintering and melting process during the metal drop manufacturing process, and There is an advantage of increasing the process efficiency of selectively controlling a wide plasma electron beam and a focused plasma electron beam.

On the other hand, the upper plate 15 of the frame unit 10 has a powder layer formed on the laminated plate 79, and then the raw material powder P located around the powder layer forming hole 16 or on the upper surface of the upper plate 15 is transferred to the blade 35 ) Or the first powder discharge hole 18 penetrated in the vertical direction at a position spaced apart from the powder layer forming opening 16 in one direction to be discharged downward from the upper plate 15 by the upper portion of the sliding transfer unit 40 Is formed.

In addition, the powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention has a storage space 110 opened upward and is located between a plurality of vertically extending copper plates 50 The upper part is mounted on one side of the upper plate 15 and includes a powder storage member 100 for storing raw material powder discharged to the first powder discharge hole 18.

In addition, the powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention is not shown, but the first motor 41, the second motor 84, and the third motor 75 ), and a control unit 180 for controlling driving of the first motor 41, the second motor 84, and the third motor 75 according to the control of the user's operation unit, A power supply unit (not shown) is provided that is connected to the control unit and supplies power required for driving the first motor, the second motor, and the third motor, and supplies power necessary for the operation of the first and second ammeters and the temperature measuring unit. .

The operation unit may be mounted on one side of the frame unit 10, and it is preferable that a plurality of buttons are provided to individually operate the first motor 41, the second motor 84, and the third motor 75. Do. In addition, the power supply unit may be applied with a battery detachable to the frame unit 10, but it is preferable that a plug for connecting a commercial power supply is provided.

Meanwhile, the powder supply device 1 according to an embodiment of the present invention is not shown, but the raw material remaining on the upper surface of the upper plate 15 after the powder layer L is formed at the lower end of the first hopper support member 61 A brush (not shown) in contact with the upper surface of the upper plate 15 may be provided to discharge the powder into the first powder discharge hole 18.

As described above, the powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention is capable of adjusting the height of the laminated plate 79, supplying the raw material powder (P), and forming the powder layer (L). Since it can be made through a series of processes, it is possible to increase the lamination process efficiency.

In addition, the powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention can collect the raw material powder P falling between the powder layer forming hole 16 and the laminated plate 79. It is economical and has the advantage of improving management efficiency.

In addition, the powder supply device 1 for a metal lamination manufacturing process using a plasma electron beam according to an embodiment of the present invention is easy to transfer the raw material powder and form a powder layer, and the raw material powder is prepared by a blade 35 having a multistage scraper. Since it can be spread evenly, the straightness of the powder is improved, and there is an effect of obtaining a powder layer of uniform density.

The powder supply device 1 for a metal lamination manufacturing process using a plasma beam according to an embodiment of the present invention uses a plasma beam during the metal lamination manufacturing process so that a plasma beam of a condition suitable for sintering or melting of the powder layer L is irradiated. There is an advantage in that it can be monitored to increase the reliability of the process.

Meanwhile, FIG. 9 shows a powder supply apparatus for a metal lamination manufacturing process using a plasma electron beam according to another embodiment of the present invention. Components having the same function as in the drawings shown above are denoted by the same reference numerals.

Powder supply device 2 according to another embodiment of the present invention is powder according to an embodiment of the present invention except for the powder support member 194, the powder storage member 200, and the powder support member coupling portion 189 It has the same structure as the supply device 1.

The powder support member 194 is formed so that the bottom of the raw material powder accumulating groove 195 drawn downward is inclined downward toward the powder storage member 200, and the raw material powder is in close contact with the powder storage member 200. A second powder discharge hole 197 through which the deposition groove 195 is communicated is further provided.

The second powder discharge hole 197 is formed through a downward slope along the extension line of the bottom surface of the raw material powder deposition groove 195 and is formed in the width direction of the powder support member 194 corresponding to the width of the raw material powder deposition groove 195 Is extended.

The powder storage member 200 has a storage space 210 opened upward and is mounted on the upper plate 15 so as to be positioned between a plurality of vertically extending copper plates 50 and discharged to the first powder discharge hole 18. A powder inlet hole 205 capable of storing raw material powder (P) or communicating with the second powder discharge hole 197 is formed on the side facing the powder support member 194 and discharged from the second powder discharge hole 197 The raw material powder (P) is stored.

The powder inlet hole 205 is formed through a length greater than the thickness of the powder support member 194 in the vertical direction so as to communicate with the second powder discharge hole 197 regardless of the height of the powder support member 194.

The powder support member coupling portion 189 is coupled to the main upper part 88 to support the powder support member 194, and is formed through a powder inlet hole 205 that is formed vertically larger than the thickness of the powder support member 194. A powder inlet hole (205) on the side facing the powder storage member (200) to prevent the introduced raw material powder (P) from being re-discharged from the powder storage member (200) to the lower side of the powder support member coupling part (189). ) And a blocking portion 198 covering.

In the powder supply device 2 for a metal lamination manufacturing process using a plasma electron beam according to another embodiment of the present invention, the raw material powder flowing into the powder supporting member 194 is inclined in the raw material powder storage groove 195 without a separate process. There is an advantage that the raw material powder management is easy because it can be stored in the powder storage member 200 along the cotton.

In the above, the powder supply apparatus for a metal lamination manufacturing process using a plasma electron beam according to the present invention has been described with reference to an example shown in the drawings, but this is only exemplary, and those of ordinary skill in the art It will be appreciated that various modifications and other equivalent embodiments are possible. Therefore, the scope of the true technical protection of the present invention should be determined by the technical spirit of the attached claims.

1: Powder supply device for metal lamination manufacturing process using plasma electron beam
10: frame unit
11: base plate 13: upper plate support frame
15: upper plate 16: powder layer forming sphere
17: moving guide hole 18: first powder discharge hole
20: lifting unit support plate 21: first support plate frame
24: second support plate frame
30: hopper
31: powder supply hole 33: slope
40: sliding transfer unit
41: first rotating shaft 43: first motor
46: horizontal moving member 47: horizontal extension moving plate
50: vertical extension moving plate 51: moving support unit
53: rail 54: slider
56: hopper seating unit 57: advancing and retreating space forming member
61: first hopper support member 65: second hopper support member
70: Hopper opening and closing unit
71: opening and closing member 74: third rotating shaft
75: third motor 76: opening and closing member moving guide bar
78: spring
79: laminated plate
80: lifting unit
81: second rotation shaft 84: second motor
87: upright member 91: elevating guide bar
94: powder support member 95: raw material powder deposition groove
97: laminated plate support member
100: powder storage member
110: storage space
150: plasma electron beam monitoring unit
151: electron beam detection current measuring unit 152: first Faraday cage
161: electron beam profile measurement unit 162: second Faraday cage
171: electron beam focusing speed measurement unit 172: high melting point specimen

Claims (10)

A hopper through which raw material powder is supplied;
A frame unit having an internal space and having a powder layer forming hole formed at an upper end thereof to form a powder laminated space in which the raw material powder is laminated to form a powder layer by stacking the raw material powder together with the laminated plate that is formed through the upper and lower portions;
A blade for moving the raw material powder in one direction so that the raw material powder discharged from the hopper is transferred in one direction to form the powder layer on the laminate;
A lifting unit mounted on one side of the inner space of the frame unit to lift the laminated plate;
And a plasma electron beam monitoring unit mounted on the frame unit and monitoring the plasma electron beam reaching the laminated plate in order to determine whether the irradiation condition of the plasma electron beam for sintering or melting the powder layer is satisfied,
The plasma electron beam monitoring unit
The first Faraday in which the plasma electron beam irradiated from the electron gun located above the frame unit is received and opened upward so that a current is formed in the connected electric circuit and an inner space having an inner diameter larger than the width of the plasma electron beam is formed. An electron beam detection current measuring unit that measures a detection current of the plasma electron beam including a cage,
An upper cover portion formed of an insulator through which the center side passes so that only the center side of the plasma electron beam passes, a lower cover portion supporting the upper cover portion and having an inner space opened upward, and the upper cover being accommodated in the lower cover portion An electron beam profile measuring unit that measures the profile of the plasma electron beam, including a second Faraday cage including a beam receiving unit formed of a conductor such that a current is formed in an electric circuit connected by receiving the plasma electron beam passing through the unit,
A metal layer manufacturing process using a plasma electron beam, comprising a high melting point specimen formed of a solid solution point metal capable of withstanding the temperature of the focused plasma electron beam, and an electron beam focusing speed measuring unit measuring the focusing speed of the plasma electron beam. Powder supply device. delete The method of claim 1,
In order to supply the raw material powder to the powder stacking space, the hopper mounted on the upper portion of the frame unit is moved adjacent to the powder stacking space, or the sintering or melting process by the plasma electron beam after the powder layer is formed. A sliding transfer unit sliding with respect to the frame unit to separate the hopper from the powder stacking space;
A hopper opening/closing unit mounted on the upper part of the sliding transfer unit to open and close the powder supply hole formed at the lower end of the hopper; further comprising,
The blade is
A powder supply device for a metal laminate manufacturing process using a plasma electron beam, characterized in that it is mounted on the upper portion of the sliding transfer unit to be spaced apart from the powder supply hole. A hopper through which raw material powder is supplied;
A frame unit having an internal space and having a powder layer forming hole formed at an upper end thereof to form a powder laminated space in which the raw material powder is laminated to form a powder layer by stacking the raw material powder together with the laminated plate that is formed through the upper and lower portions;
A blade for moving the raw material powder in one direction so that the raw material powder discharged from the hopper is transferred in one direction to form the powder layer on the laminate;
A lifting unit mounted on one side of the inner space of the frame unit to lift the laminated plate;
A plasma electron beam monitoring unit mounted on the frame unit and monitoring the plasma electron beam reaching the laminated plate to determine whether an irradiation condition of the plasma electron beam for sintering or melting the powder layer is satisfied;
In order to supply the raw material powder to the powder stacking space, the hopper mounted on the upper portion of the frame unit is moved adjacent to the powder stacking space, or the sintering or melting process by the plasma electron beam after the powder layer is formed. A sliding transfer unit sliding with respect to the frame unit to separate the hopper from the powder stacking space;
A hopper opening and closing unit mounted on the upper portion of the sliding transfer unit to open and close the powder supply hole formed at the lower end of the hopper;
The blade is
It is mounted on the upper portion of the sliding transfer unit spaced apart from the powder supply hole,
The sliding transfer unit
A first rotating shaft extending in the longitudinal direction of the frame unit in the inner space of the frame unit and rotatable by connecting a first motor to one end thereof;
A horizontal moving member that is penetratingly coupled to the first rotating shaft and moving in one or the other direction in the longitudinal direction of the first rotating shaft according to the rotating direction of the first rotating shaft;
A horizontal extension plate coupled to the horizontal moving member and extending in the width direction of the frame unit,
Each lower part is coupled to both sides in the width direction of the horizontal extension copper plate and extends in the vertical direction, but penetrates into a position spaced apart from each other in the width direction of the frame unit with the powder layer forming hole formed on the upper end of the frame unit therebetween. A plurality of vertically extending moving plates extending through each of a plurality of movement guide holes extending in the longitudinal direction;
Powder supply for a metal lamination manufacturing process using a plasma electron beam, characterized in that it has a hopper seating unit that connects each upper portion of the upper and lower extension copper plates each passing through the movement guide hole at a corresponding position and forms a hopper seating space. Device. The method of claim 4, wherein the sliding transfer unit
Further comprising a plurality of movement support units spaced apart from each other in the width direction of the frame unit to support the horizontal extension copper plate so that the first rotation shaft is positioned therebetween,
The plurality of moving support units
Plasma comprising: a rail extending parallel to the first rotation axis; a slider seated on the rail and movable in the longitudinal direction of the rail and supporting one side or the other side in the longitudinal direction of the horizontal extension plate. Powder supply device for metal lamination manufacturing process using electron beam. The method of claim 4, wherein the hopper seating unit
The hopper opening/closing unit is mounted on the upper end of the plurality of vertical extension plates and is spaced apart from each other, so that the hopper opening/closing unit forms an advancing and retreating space in the longitudinal direction of the frame unit under the hopper, and extending in the width direction of the frame unit. A plurality of advancing and retreating space forming members to which one side or the other side of the blade is respectively mounted,
A first hopper support member extending in the width direction of the frame unit and having both sides coupled to one end of the plurality of advancing and retreating space forming members, connecting the plurality of advancing and retreating space forming members, and supporting one side of the hopper,
It extends in the width direction of the frame unit and is spaced apart from the first hopper support member in the longitudinal direction of the frame unit, and the both sides are coupled to the plurality of advancing and retreating space forming members so as to be spaced apart from the powder layer forming hole. A powder supply device for a metal lamination manufacturing process using a plasma electron beam, comprising: a second hopper supporting member supporting the inclined surface of the hopper, and having a contact surface in contact with the inclined surface. The method of claim 1, wherein the frame unit
A square base plate,
A plurality of upper plate support frames mounted on both sides of the base plate in the width direction and spaced apart from each other and extending in the length direction of the base plate,
Both sides are supported by the plurality of upper plate support frames and extend in parallel with the base plate, the powder layer forming hole is formed on one side, and penetrates at a position spaced apart from each other in the width direction with the powder layer forming hole interposed therebetween, and the length direction A top plate having a plurality of movement guide holes extending to the top,
A lifting unit support plate supporting the lifting unit,
A first support plate frame connecting each side of the plurality of upper plate support frames and supporting one side of the lifting unit support plate,
Metal lamination manufacturing using plasma electron beams, comprising: a second support plate frame connecting each other side of the plurality of upper plate support frames, supporting the other side of the lifting unit support plate, and passing the first rotation axis of the sliding transfer unit Process powder supply device. A hopper through which raw material powder is supplied;
A frame unit having an internal space and having a powder layer forming hole formed at an upper end thereof to form a powder laminated space in which the raw material powder is laminated to form a powder layer by stacking the raw material powder together with the laminated plate that is formed through the upper and lower portions;
A blade for moving the raw material powder in one direction so that the raw material powder discharged from the hopper is transferred in one direction to form the powder layer on the laminate;
A lifting unit mounted on one side of the inner space of the frame unit to lift the laminated plate;
And a plasma electron beam monitoring unit mounted on the frame unit and monitoring the plasma electron beam reaching the laminated plate in order to determine whether the irradiation condition of the plasma electron beam for sintering or melting the powder layer is satisfied,
The frame unit
A square base plate,
A plurality of upper plate support frames mounted on both sides of the base plate in the width direction and spaced apart from each other and extending in the length direction of the base plate,
Both sides are supported by the plurality of upper plate support frames and extend in parallel with the base plate, the powder layer forming hole is formed on one side, and penetrates at a position spaced apart from each other in the width direction with the powder layer forming hole interposed therebetween, and the length direction A top plate having a plurality of movement guide holes extending to the top,
A lifting unit support plate supporting the lifting unit,
A first support plate frame connecting each side of the plurality of upper plate support frames and supporting one side of the lifting unit support plate,
And a second support plate frame connecting each other side of the plurality of upper plate support frames, supporting the other side of the lifting unit support plate, and passing the first rotation axis of the sliding transfer unit,
The lifting unit
A second rotation shaft extending in the vertical direction and having an upper end rotatably supported on the upper plate,
A second motor mounted on the lifting unit support plate and connected to the second rotation shaft,
An up-and-down member mounted through the second rotation shaft and elevating in accordance with the rotation direction of the second rotation shaft;
A raw material powder deposition groove is formed which is supported by the moving member so as to be located below the powder layer forming hole, and is drawn in a downward direction larger than the cross-sectional area of the powder layer forming hole to store the raw material powder falling between the laminate and the powder layer forming hole. A powder support member,
A powder supply device for a metal laminate manufacturing process using a plasma electron beam, comprising: a laminated plate support member extending vertically from the center of the raw material powder deposition groove of the powder support member and on which the laminated plate is mounted. The method of claim 8, wherein the top plate
After the powder layer is formed, a first powder discharge hole is formed through which the raw material powder located on the upper plate is discharged downward from the upper plate by the blade or the upper portion of the sliding transfer unit,
A storage space opened upward is formed, and further comprising a powder storage member mounted on the upper plate to store the raw material powder discharged through the first powder discharge hole,
The raw material powder deposition groove is formed to be inclined downwardly with a bottom surface toward the powder storage member,
The powder support member is formed with a second powder discharge hole formed through communication with the raw material powder deposition groove at one side in close contact with the powder storage member,
The powder storage member is characterized in that a powder inlet hole capable of communicating with the second powder discharge hole is formed on a side facing the powder support member so that the raw material powder discharged from the second powder discharge hole flows into the storage space. Powder supply device for metal lamination manufacturing process using plasma electron beam. The method of claim 6, wherein the hopper opening and closing unit
Opening and closing having a horizontal portion extending between the plurality of advancing and retreating space forming members spaced apart from each other, and a vertical portion extending vertically from an end of the horizontal portion and spaced apart from the powder layer forming hole with respect to the second hopper support member Absence and,
A third rotation shaft screwed with the opening and closing member so that the opening and closing member is positioned under the powder supply hole or moved away from the lower side according to the rotation direction;
Powder supply device for a metal lamination manufacturing process using a plasma electron beam, characterized in that it has a third motor connected to the third rotating shaft and supported on a motor support frame coupled to each upper end of the plurality of vertical extension plates .

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