JP6411784B2 - 3D modeling equipment - Google Patents

Description

  The present invention relates to a three-dimensional modeling apparatus for manufacturing a three-dimensional modeled object by repeatedly forming powder in a layered manner.

  Conventionally, a three-dimensional structure that produces a three-dimensional structure formed by stacking a plurality of sintered bodies by repeatedly performing a sintering operation to form a sintered body by irradiating an energy beam focused on a powder layer of metal powder A modeling apparatus is disclosed (see Patent Document 1 and Patent Document 2).

JP 2011-127195 A JP 2006-511710 A

  An object of the present invention is to provide a three-dimensional modeling apparatus with high accuracy and productivity.

The three-dimensional modeling apparatus of one embodiment according to the present invention is
A support frame;
A material supply unit supported by the support frame;
One planar table on which the material supported by the support frame and supplied from the material supply unit is placed ;
A drive unit for driving the table;
A measuring unit for measuring the position of the table;
A control unit for controlling the drive unit based on the measurement value of the measurement unit;
With
The drive unit has at least a first drive unit and a second drive unit that can be driven independently,
The measurement unit has at least a first measurement unit and a second measurement unit for measuring the position of the table, respectively.
The control unit controls the first driving unit and the second driving unit independently based on measurement values of the first measurement unit and the second measurement unit, respectively. To do.

The three-dimensional modeling apparatus of one embodiment according to the present invention is
An input unit for inputting in advance an instruction movement amount of the table;
A storage unit that stores an instruction movement amount input from the input unit;
With
The control unit moves the table by the indicated movement amount stored in the storage unit.

In the three-dimensional modeling apparatus of one embodiment according to the present invention,
The control unit feeds back a status signal of the driving unit.

The three-dimensional modeling apparatus of one embodiment according to the present invention is
Further comprising a transmission section having a front Symbol first transmission section and a second transmission unit and transmits it to the table each driving force of the first driving unit and the second driving unit.

In the three-dimensional modeling apparatus of one embodiment according to the present invention,
The first measurement unit and the second measurement unit are respectively disposed corresponding to the support positions of the table, the first transmission unit, and the second transmission unit transmission unit.

In the three-dimensional modeling apparatus of one embodiment according to the present invention,
The driving unit further includes a third driving unit and a fourth driving unit that can be driven independently,
The first driving unit, the second driving unit, the third driving unit, and the fourth driving unit are arranged at positions that form a quadrangle,
The transmission unit further includes a third transmission unit and a fourth transmission unit that transmit the driving force of the third driving unit and the fourth driving unit to the table,
The control unit can independently control the first drive unit, the second drive unit, the third drive unit, and the fourth drive unit.

The three-dimensional modeling apparatus of one embodiment according to the present invention is
A rod that moves with the table;
A limit switch that contacts when the rod reaches a predetermined position;
Is provided.

  According to the present invention, it is possible to provide a three-dimensional modeling apparatus with high accuracy and productivity.

It is a figure which shows the three-dimensional modeling apparatus of one Embodiment concerning this invention. It is an enlarged view which shows the modeling mounting part of the three-dimensional modeling apparatus of this embodiment. It is the schematic which shows arrangement | positioning of the drive transmission part of the three-dimensional modeling apparatus of this embodiment. It is a schematic perspective view which shows the modeling mounting part of the three-dimensional modeling apparatus of this embodiment. It is a figure which shows the control system of the three-dimensional modeling apparatus 1 of this embodiment. It is an enlarged view which shows the action | operation of the modeling mounting part of the three-dimensional modeling apparatus of this embodiment. It is an enlarged view which shows the action | operation of the modeling mounting part of the three-dimensional modeling apparatus of this embodiment. It is an enlarged view which shows the action | operation of the modeling mounting part of the three-dimensional modeling apparatus of this embodiment. It is an enlarged view which shows the action | operation of the modeling mounting part of the three-dimensional modeling apparatus of this embodiment. It is a figure which shows the state in which the molded article was formed with the three-dimensional modeling apparatus of this embodiment. It is a figure which shows the three-dimensional modeling apparatus of other embodiment concerning this invention. It is the schematic which shows arrangement | positioning of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows arrangement | positioning of the drive transmission part of the three-dimensional modeling apparatus of a reference example . It is the schematic which shows arrangement | positioning of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows arrangement | positioning of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows the structure of the drive transmission part of the three-dimensional modeling apparatus of this embodiment. It is the schematic which shows the structure of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows the structure of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows the structure of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows the structure of the drive transmission part of the three-dimensional modeling apparatus of other embodiment. It is the schematic which shows the structure of the drive transmission part of the three-dimensional modeling apparatus of other embodiment.

  FIG. 1 is a diagram showing a three-dimensional modeling apparatus according to an embodiment of the present invention.

  The three-dimensional modeling apparatus 1 according to the present embodiment includes an energy beam irradiation unit 2 as a material supply unit, a powder supply unit 3 as a material supply unit, and a modeling object placing unit 4. The energy beam irradiation unit 2, the powder supply unit 3, and the modeled article placement unit 4 are supported by the support frame 11. Further, a reference frame 12 as a part of the support frame 11 is formed at an intermediate portion of the support frame 11.

  The energy beam irradiation unit 2 includes a beam generation unit 21 that generates an energy beam EB, and a beam scanning unit 22 that adjusts the focal position of the energy beam EB irradiated from the beam generation unit 21 and that can perform two-dimensional scanning. And is placed on the support frame 11. In the present embodiment, the beam operation unit 22 performs two-dimensional scanning, but may perform three-dimensional scanning that can operate the focal position of the beam in the vertical direction.

  The beam generator 21 preferably generates a laser beam or an electron beam. When the energy beam EB is light, the beam scanning unit 22 moves an optical element such as a lens to focus the light on a metal powder M on a table, which will be described later, and performs two-dimensional scanning on the table 41. As an example, the energy beam irradiation unit 2 may be configured as a laser irradiation unit described in Patent Document 1. When the energy beam EB is an electron beam, the beam scanning unit 22 focuses the electron beam by controlling the electromagnetic field and performs two-dimensional scanning on the table 41. As an example, the energy beam irradiation unit 2 may be configured as an apparatus for irradiating and guiding an electron beam described in Patent Document 2.

  The powder supply unit 3 includes a powder storage unit 31 that temporarily stores the metal powder M, a leveling unit 32 that averages the metal powder M on a table, and an outer frame unit 33.

  The powder storage unit 31 includes a container held by the support frame 11, has an injection unit 31 a for injecting the metal powder M on the upper side, and a discharge unit 31 b for discharging the metal powder M on the lower side. It is preferable that the discharge part 31b can adjust the discharge amount of the metal powder M.

  The leveling part 32 is a part that forms a flat surface having a uniform height as much as possible by moving a member such as a scraper on the table 41 with the metal powder M discharged from the powder storage part 31. In addition, it is preferable that the height which levels the metal powder M can be adjusted.

  The outer frame portion 33 is supported by the support frame 11 and is installed on the outer periphery of a table 41 described later. Excess metal powder M after the leveling portion 32 is leveled moves to the outer frame portion 33. These metal powders M are preferably circulated by a circulation unit (not shown) that returns to the powder storage unit 31.

  The powder supply unit 3 may be provided with a circulation unit (not shown) that returns the metal powder M on the table 41 that has not been formed to the powder storage unit 31 after being discharged from the discharge unit 31b.

  The material supply unit is not limited to the energy beam irradiation unit 2 and the powder supply unit 3 as in this embodiment, but a form in which a sheet or tape-like resin, paper, metal, or the like is bonded, a form in which a liquid is cured, an inkjet head A form in which a solid or a liquid is sprayed and bonded using a metal, a form in which filaments are deposited and welded, a form in which metal powder is welded, or the like may be used.

  FIG. 2 is an enlarged view showing a modeling placement part of the three-dimensional modeling apparatus of this embodiment. FIG. 3 is a schematic diagram showing the arrangement of the drive transmission unit of the three-dimensional modeling apparatus of this embodiment. FIG. 4 is a schematic perspective view showing a modeling placement part of the three-dimensional modeling apparatus of this embodiment.

  The modeling object placing unit 4 includes a table 41, a slider 42, a ball screw 43, a speed reduction unit 44, a table driving unit 45, a magnetic sensor 46, a magnetic scale 47, a rod 48, and a limit switch 49. Have.

  The table 41 is supported by the slider 42. The upper surface of the table 41 is formed in a flat surface, and the metal powder M shown in FIG. 1 is discharged and placed on the upper surface. The modeled object is preferably formed in a modeled area 41 a that is smaller than the outer shape of the table 41.

  The slider 42 supports the table 41 on the upper surface. Below, it is supported by the ball screw 43. The ball screw 43 is connected to the drive unit 45 via the speed reduction unit 44. The drive unit 45 includes a servo motor or other actuator, and the ball screw 43 rotates when the drive unit 45 is driven. The table 42 also moves up and down as the slider 42 moves up and down as the ball screw 43 rotates. . The ball screw 43 preferably penetrates the reference frame 12.

  In the present embodiment, four ball screws 43, a speed reduction unit 44, a drive unit 45, a magnetic sensor 46, and a magnetic scale 47 are provided. In addition, the ball screw 43 and the speed reduction part 44 comprise a transmission part. The drive unit 45 and the transmission unit constitute a drive transmission unit. In addition, the linear motion mechanism of the drive part 45 and the ball screw 43 may be sufficient without using the deceleration part 44. In the case of the linear motion mechanism, the backlash can be suppressed, so that the control can be performed with higher accuracy.

  As shown in FIG. 3, the first ball screw 43a, the second ball screw 43b, the third ball screw 43c, and the fourth ball screw 43d are connected to the slider 42 corresponding to the four corners outside the modeling region 41a.

  As shown in FIG. 4, the first drive unit 45a, the second drive unit 45b, the third drive unit 45c, and the fourth drive unit 45d are respectively a first reduction unit 44a, a second reduction unit 44b, and a third reduction unit. The first ball screw 43a, the second ball screw 43b, the third ball screw 43c, and the fourth ball screw 43d are connected to each other via the 44c and the fourth reduction portion 44d.

  Below the slider 42, a first magnetic sensor 46a, a second magnetic sensor 46b, a third magnetic sensor 46c, and a fourth magnetic sensor 46d are a first ball screw 43a, a second ball screw 43b, a third ball screw 43c, and a second magnetic sensor 46d. The four ball screws 43d are attached to correspond to the support positions.

  The magnetic sensor 46 is an example of a measurement unit. In addition to this example, the measurement unit may be an optical position sensor or an ultrasonic sensor that detects a distance by attaching a light emitting unit to one of the slider 42 or the support frame 11 and a light receiving unit to the other. In particular, it is preferable to attach one to the reference frame 12 and the other to the slider 42. In addition, these sensors are preferably attached corresponding to the support positions of the first ball screw 43a, the second ball screw 43b, the third ball screw 43c, and the fourth ball screw 43d. Alternatively, the rotation angle of the motor may be converted into a stroke amount by a motor encoder (not shown) and the position may be detected in detail using the magnetic sensor 46.

  The support frame 11 on the side of the slider 42 is provided with a magnetic scale that faces the first magnetic sensor 46a, the second magnetic sensor 46b, the third magnetic sensor 46c, and the fourth magnetic sensor 46d. A first magnetic scale 47a, a second magnetic scale 47b, a third magnetic scale 47c, and a fourth magnetic scale 47d are provided.

  A rod 48 is attached to at least one of the first ball screw 43a, the second ball screw 43b, the third ball screw 43c, and the fourth ball screw 43d. The rod 48 moves together with the table 41, the slider 42, and the ball screw 43. A limit switch 49 is disposed below the rod 48. Therefore, if the table 41, the slider 42, the ball screw 43, and the rod 48 have a large amount of downward movement or a large amount of upward movement, the limit switch 49 is actuated to notify the danger.

  Next, the control system of the three-dimensional modeling apparatus 1 of this embodiment will be described.

  FIG. 5 is a diagram illustrating a control system of the three-dimensional modeling apparatus 1 of the present embodiment.

  As illustrated in FIG. 5, the three-dimensional modeling apparatus 1 of the present embodiment includes an input unit 51, a first magnetic sensor 46 a, a second magnetic sensor 46 b, a third magnetic sensor 46 c, a fourth magnetic sensor 46 d, and a storage unit 52. The control unit 50 controls the first drive unit 45a, the second drive unit 45b, the third drive unit 45c, and the fourth drive unit 45d independently of each of the signals input from.

  The input unit 51 inputs information such as a molding shape, a molding pressure, and a molding speed in advance. The storage unit 52 stores information input from the input unit 51, a modeling process, and the like, and outputs the information to the control unit 50. Each of the first magnetic sensor 46a, the second magnetic sensor 46b, the third magnetic sensor 46c, and the fourth magnetic sensor 46d includes a first magnetic scale 47a, a second magnetic scale 47b, a third magnetic scale 47c, and a second magnetic sensor that face each other. Each displacement or speed is measured from the scale of the 4 magnetic scale 47 d and output to the control unit 50.

  The first drive unit 45a, the second drive unit 45b, the third drive unit 45c, and the fourth drive unit 45d preferably feed back signals such as current, rotational speed, and rotational torque to the control unit 50.

  Next, the operation of the three-dimensional modeling apparatus 1 of this embodiment will be described.

  6 to 9 are enlarged views showing the operation of the modeling table unit of the three-dimensional modeling apparatus of this embodiment.

  In the three-dimensional modeling apparatus 1 of the present embodiment, first, each drive unit 45 shown in FIG. 4 is driven, and the table 41 is moved downward as shown in FIG. The instruction movement amount in the table 41 may be input in advance to the input unit 51 shown in FIG. 5 and stored in the storage unit 52.

  Here, in the 3D modeling apparatus 1 of the present embodiment, the first drive unit 45a, the second drive unit 45b, and the third drive unit 45a are moved while the table 41 is moved by the indicated movement amount stored in the storage unit 52. From signals such as current, rotation speed, and rotation torque of the drive unit 45c and the fourth drive unit 45d, and the first magnetic sensor 46a, the second magnetic sensor 46b, the third magnetic sensor 46c, and the fourth magnetic sensor 46d The measurement signal is input to the control unit 50.

  The control unit 50 controls the first driving unit 45a, the second driving unit 45b, the third driving unit 45c, and the fourth driving unit 45d independently from these signals, and controls the table 41 to a predetermined posture. . In the present embodiment, the table 41 is controlled horizontally.

  Subsequently, the metal powder M is discharged onto the table 41 from the discharge part 31 b of the powder storage part 31. Next, the metal powder M is uniformly leveled on the table 41 by the leveling unit 32 so that the surface is horizontal. Subsequently, the energy beam irradiation unit 2 shown in FIG. 1 irradiates the energy beam EB, and as shown in FIG. 7, the metal powder M is sintered to form a part of the modeled object M ′.

  Next, each drive unit 45 shown in FIG. 4 is driven again, and the table 41 is moved downward as shown in FIG. The movement amount of the table 41 may be input in advance to the input unit 51 illustrated in FIG. 5 and stored in the storage unit 52.

  Here, similarly to the previous case, in the three-dimensional modeling apparatus 1 of the present embodiment, the first drive unit 45a and the second drive are performed while the table 41 is moved by the indicated movement amount stored in the storage unit 52. Signals of the current, rotation speed, and rotation torque of the unit 45b, the third drive unit 45c, and the fourth drive unit 45d, the first magnetic sensor 46a, the second magnetic sensor 46b, the third magnetic sensor 46c, and the A measurement signal from the 4 magnetic sensor 46 d is input to the control unit 50.

  The control unit 50 controls the first drive unit 45a, the second drive unit 45b, the third drive unit 45c, and the fourth drive unit 45d independently from these signals to control the table 41 to a predetermined posture. . In the present embodiment, the table 41 is controlled horizontally.

  Subsequently, the metal powder M is discharged onto the table 41 from the discharge part 31 b of the powder storage part 31. Next, the metal powder M is uniformly leveled on the table 41 by the leveling unit 32 so that the surface is horizontal. Subsequently, the energy beam irradiation unit 2 shown in FIG. 1 irradiates the energy beam EB, and as shown in FIG. 9, the metal powder M is sintered to form a part of the shaped object M ′.

  FIG. 10 is a diagram illustrating a state in which a modeled object is formed by the three-dimensional modeling apparatus of the present embodiment.

  By operating the three-dimensional modeling apparatus of the present embodiment as illustrated in FIGS. 6 to 9, a modeled object M ′ is formed as illustrated in FIG. 10.

  As described above, since the first driving unit 45a, the second driving unit 45b, the third driving unit 45c, and the fourth driving unit 45d are independently provided, the posture of the table 41 can be set in many patterns. It is possible to form many types of shaped objects M ′.

  In addition, since the first drive unit 45a, the second drive unit 45b, the third drive unit 45c, and the fourth drive unit 45d can be controlled independently to control the table 41 in a predetermined posture, Can be formed with high accuracy.

  Furthermore, the control unit 50 controls the table 41 horizontally by independently controlling the first drive unit 45a, the second drive unit 45b, the third drive unit 45c, and the fourth drive unit 45d, so It becomes possible to form an accurate shaped object M ′.

  FIG. 11 is a diagram showing a three-dimensional modeling apparatus according to another embodiment of the present invention. FIG. 12 is a schematic diagram illustrating an arrangement of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In another embodiment of the three-dimensional modeling apparatus 1 shown in FIGS. 11 and 12, a fifth drive unit 45 e, a fifth reduction unit 44 e, and a fifth ball screw 43 e are disposed below the center of the table 41. And it is preferable to control all the five drive parts 45 independently.

  By thus supporting the table 41 at five positions and driving it with the five driving units 45, it becomes possible to form the molded article M 'with higher accuracy. In addition, the level of the table 41 can be maintained with higher accuracy, and a model M 'with higher accuracy can be formed. Furthermore, it becomes possible to place a large-sized model with a high weight and a large area.

FIG. 13 is a schematic diagram illustrating the arrangement of the drive transmission unit of the reference three-dimensional modeling apparatus. This reference example is not included in the present invention.

In the reference example of the three-dimensional modeling apparatus 1 shown in FIG. 13, one first ball screw 43a is provided.

  Thus, by supporting the table 41 at one position and driving it by a single drive unit 45 (not shown), the number of ball screws 43, speed reduction units 44, and drive units 45 can be reduced, and at low cost. It becomes possible to form the modeled object M ′.

  It is preferable that the first ball screw 43a that supports the table 41 is disposed at the position of the center of gravity of the table 41 because the table 41 becomes stable.

  FIG. 14 is a schematic diagram illustrating an arrangement of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In another embodiment of the three-dimensional modeling apparatus 1 shown in FIG. 14, at least two first ball screws 43a and second ball screws 43b are provided. And it is preferable to control all the two drive parts 45 which are not shown in figure independently.

  In this way, by supporting the table 41 at two positions and driving it with two drive parts 45 (not shown), the number of ball screws 43, speed reduction parts 44, and drive parts 45 can be reduced, and at low cost. It becomes possible to form the modeled object M ′.

  In addition, it is preferable to arrange the first ball screw 43a and the second ball screw 43b so that the straight line connecting the first ball screw 43a and the second ball screw 43b supporting the table 41 includes the center of gravity of the table 41, because the table 41 becomes stable.

  FIG. 15 is a schematic diagram illustrating an arrangement of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In another embodiment of the three-dimensional modeling apparatus 1 shown in FIG. 15, the third ball screw 43c is arranged so as to form a triangle with the first ball screw 43a and the second ball screw 43b. It is preferable to control all three drive units 45 (not shown) independently.

  As described above, the table 41 is supported at three positions and driven by the three driving units 45 (not shown), so that the plane is fixed and stabilized, and the number of the ball screw 43, the speed reduction unit 44, and the driving unit 45 is increased. Therefore, it is possible to form the modeled object M ′ at a low cost.

  Note that the first ball screw 43a, the second ball screw 43b, and the third ball screw 43a, the third ball screw 43b, and the third ball screw 43c that support the table 41 include the center of gravity of the table 41 so that the triangle formed by the triangle is formed. It is preferable to arrange the ball screw 43c because the table 41 is stabilized.

  FIG. 16 is a schematic diagram illustrating a structure of a drive transmission unit of the three-dimensional modeling apparatus according to the present embodiment.

  In the present embodiment shown in FIG. 16, the table 41 is moved up and down via the slider 42 by rotating the screw portion 432 of the ball screw 43 by the driving force of the drive portion 45 and moving the nut portion 431 up and down. The nut portion 431 and the table 41 may be directly connected.

  The nut portion 431 accommodates a nut 431 a inside, and an outer case 431 b is fixed to the slider 42. The nut 431a is rotatable with respect to the case 431b. The screw part 432 is rotatably fixed to the slider 42 at the upper part, is screwed with the nut 431a immediately below the slider 42, and is connected to the speed reducer 44 via a coupling at the lower part. Further, the screw portion 432 passes through a spline nut 433 that is fixed to the reference frame 12.

  The driving force generated from the drive unit 45 rotates the screw part 432 via the speed reduction unit 44. When the screw part 432 rotates, the nut 431a of the nut part 431 rotates. Since the nut portion 431 can move up and down along the screw portion 432, when the nut 431a rotates, the slider 42 moves up and down and the table 41 moves up and down.

  FIG. 17 is a schematic diagram illustrating a structure of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In the embodiment shown in FIG. 17, the screw portion 432 of the ball screw 43 is rotated by the driving force of the drive portion 45 and the nut portion 431 is moved up and down to move the movable frame 411 up and down, and the rod 412 and the slider 42 are moved. Then, the table 41 is moved up and down. The rod 412 and the table 41 may be directly connected.

  The nut portion 431 accommodates a nut 431 a on the inner side, and an outer case 431 b is integrally attached to the movable frame 411. The screw part 432 is fixed to the support frame 11 at the upper part, penetrates through the movable frame 411, is screwed with the nut 431a immediately below the movable frame 411, and is connected to the speed reducer 44 through a coupling at the lower part.

  The driving force generated from the drive unit 45 rotates the screw part 432 via the speed reduction unit 44. When the screw part 432 rotates, the nut 431a of the nut part 431 rotates. Since the nut portion 431 can move up and down along the screw portion 432, when the nut 431 a rotates, the slider 42 moves up and down via the movable frame 411 and the rod 412, and the table 41 moves up and down.

  FIG. 18 is a schematic diagram illustrating a structure of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In the embodiment shown in FIG. 18, the nut 431 a of the nut portion 431 is rotated by the driving force of the driving portion 45 and the screw portion 432 of the ball screw 43 is moved up and down to move the table 41 up and down via the slider 42. Let The screw part 432 and the table 41 may be directly connected.

  The nut portion 431 accommodates the nut 431a on the inner side, the outer case 431b is fixed to the nut support portion 41b fixed to the reference frame 12, and cannot move up and down. The nut 431a is rotatable with respect to the case 431b. The screw portion 432 is rotatably fixed to the table 41 at the upper portion, and is screwed with the nut 431a at the lower portion. Further, the screw portion 432 passes through a spline nut 433 that is fixed to the reference frame 12.

  A first pulley 401 is fixed to the output shaft 44 a of the deceleration unit 44. A second pulley 402 is fixed to the nut 431a. The first pulley 401 and the second pulley 402 are connected by a connecting belt 401. The second pulley 402 rotates together with the nut 431 a of the nut portion 431 and penetrates the screw portion 432.

  The driving force generated from the drive unit 45 is output to the first pulley 401 via the output shaft 44 a of the speed reduction unit 44. When the first pulley 401 rotates, the second pulley 402 rotates through the connecting belt 401. When the second pulley 402 rotates, the nut 431a of the nut portion 431 rotates. Since the nut portion 431 cannot move up and down, when the nut 431a rotates, the screw portion 432 moves up and down. Therefore, the table 41 moves up and down.

  FIG. 19 is a schematic diagram illustrating a structure of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In the embodiment shown in FIG. 19, the nut 431 a of the nut portion 431 is rotated by the driving force of the drive portion 45, and the nut portion 431 of the ball screw 43 is moved up and down relative to the screw portion 432, thereby moving the movable frame 411 up and down. The table 41 is moved up and down via the rod 412 and the slider 42. The rod 412 and the table 41 may be directly connected.

  The nut portion 431 accommodates the nut 431 a inside, the outer case 431 b is fixed to the nut support portion 41 b fixed to the movable frame 411, and is attached to the movable frame 411 integrally. The drive unit 45 and the speed reduction unit 44 are also integrally attached to the movable frame 411 and move up and down together with the movable frame 411.

  The screw part 432 is fixed to the support frame 11 at the upper part and is screwed with the nut 431a at the lower part. Further, the screw portion 432 passes through a spline nut 433 fixed to the movable frame 411.

  A first pulley 401 is fixed to the output shaft 44 a of the deceleration unit 44. A second pulley 402 is fixed to the nut 431a. The first pulley 401 and the second pulley 402 are connected by a connecting belt 401. The second pulley 402 rotates together with the nut 431 a of the nut portion 431 and penetrates the screw portion 432.

  The driving force generated from the drive unit 45 is output to the first pulley 401 via the output shaft 44 a of the speed reduction unit 44. When the first pulley 401 rotates, the second pulley 402 rotates through the connecting belt 401. When the second pulley 402 rotates, the nut 431a of the nut portion 431 rotates. When the nut 431a rotates, the screw portion 432 cannot move up and down, so the nut 431a moves up and down. Therefore, the movable frame 411 moves up and down together with the nut portion 431, and the slider 42 and the table 41 connected by the rod 412 move up and down.

  FIG. 20 is a schematic diagram illustrating a structure of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In the embodiment shown in FIG. 20, a hollow direct drive motor is used as the drive unit 45, the nut 431a is rotated, and the screw part 432 of the ball screw 43 is moved up and down to move the table 41 through the slider 42. Move up and down. The screw part 432 and the table 41 may be directly connected.

  The drive unit 45 drives the nut 431a with a hollow direct drive motor, and causes the screw part 432 to pass through the center.

  The nut portion 431 accommodates a nut 431a inside and is fixed to the reference frame 12 so as not to move up and down. The nut 431a is rotatable with respect to the case 431b. The screw portion 432 is rotatably fixed to the table 41 at the upper portion, and is screwed with the nut 431a at the lower portion.

  When the driving unit 45 generates a driving force, the nut 431a of the nut unit 431 rotates. Since the nut portion 431 cannot move up and down, when the nut 431a rotates, the screw portion 432 moves up and down. Therefore, the table 41 moves up and down.

  FIG. 21 is a schematic diagram illustrating a structure of a drive transmission unit of a three-dimensional modeling apparatus according to another embodiment.

  In the embodiment shown in FIG. 21, a hollow direct drive motor is used as the drive unit 45, the nut 431a is rotated, and the screw part 432 of the ball screw 43 is moved up and down to move the movable frame 411 up and down. The table 41 is moved up and down via 412 and the slider 42. The rod 412 and the table 41 may be directly connected.

  The drive unit 45 drives the nut 431a with a hollow direct drive motor, and causes the screw part 432 to pass through the center.

  The nut portion 431 accommodates a nut 431 a on the inner side, and the outer case 431 b is fixed to the movable frame 411. The nut 431a is rotatable with respect to the case 431b. The screw part 432 is fixed to the frame 11 at the upper part and is screwed with the nut 431a at the lower part.

  When the driving unit 45 generates a driving force, the nut 431a of the nut unit 431 rotates. When the nut 431 a rotates, the nut 431 moves up and down along the screw part 432. Therefore, the movable frame 411 moves up and down together with the nut portion 431, and the slider 42 and the table 41 connected by the rod 412 move up and down.

  Here, the control system in the arrangement and structure of the drive transmission unit of the three-dimensional modeling apparatus 1 of another embodiment may be the same as that described in FIG.

  According to the three-dimensional modeling apparatus 1 of this embodiment, the support frame 11, the material supply unit 3 supported by the support frame 11, and the material supported by the support frame 11 and supplied from the material supply unit 3 are placed. The modeled object mounting unit 4 includes a table 41 on which the modeled object is mounted, a driving unit 45 that drives the table 41, and a position of the table 41. Since it has the measurement part 46 to perform and the control part 50 which controls the drive part 45 based on the measured value of the measurement part 46, it becomes possible to provide a three-dimensional modeling apparatus with high precision and productivity.

  The three-dimensional modeling apparatus 1 according to the present embodiment includes an input unit 51 that inputs an instruction movement amount of the table 41 in advance, and a storage unit 52 that stores an instruction movement amount input from the input unit 41, and includes a control unit 50. Since the table 41 is moved by an amount corresponding to the designated movement amount stored in the storage unit 52, it becomes possible to control it accurately.

  In the three-dimensional modeling apparatus 1 according to the present embodiment, the control unit 50 is fed back with the state signal of the drive unit 45, and thus can be controlled with higher accuracy.

  The drive unit 45 includes a first drive unit 45a and a second drive unit 45b that can be driven independently, and the measurement unit 46 measures a first magnetic sensor 46a and a second magnetic sensor 46b that measure the position of the table 41, respectively. And the control unit 50 controls the first driving unit 45a and the second driving unit 45b independently based on the measured values of the first magnetic sensor 46a and the second magnetic sensor 46b. It becomes possible to provide a three-dimensional modeling apparatus with high productivity.

  Further, the three-dimensional modeling apparatus 1 of the present embodiment includes a transmission unit having a first ball screw 43a and a second ball screw 43b that transmit the driving forces of the first driving unit 45a and the second driving unit 45b to the slider 42, respectively. Since 43 is further provided, the table 41 can be moved smoothly.

  In the three-dimensional modeling apparatus 1 of the present embodiment, the first magnetic sensor 46a and the second magnetic sensor 46b are respectively disposed corresponding to the support positions of the table 41, the first ball screw 43a, and the second ball screw 43b. Therefore, it becomes possible to control with higher accuracy.

  In the three-dimensional modeling apparatus 1 of the present embodiment, the drive unit 45 includes a first drive unit 45a, a second drive unit 45b, a third drive unit 45c, and a fourth drive unit 45d that are arranged at positions that form a quadrangle. The transmission unit 43 includes a first ball screw 43a and a second ball screw 43b that transmit the driving force of the first driving unit 45a, the second driving unit 45b, the third driving unit 45c, and the fourth driving unit 45d to the table 41. The third ball screw 43c and the fourth ball screw 43d, and the control unit 50 controls the first driving unit 45a, the second driving unit 45b, the third driving unit 45c, and the fourth driving unit 45d independently of each other. Therefore, it is possible to control with higher accuracy.

  The three-dimensional modeling apparatus 1 according to the present embodiment includes the rod 48 that moves together with the table 41 and the limit switch 49 that contacts when the rod 48 reaches a predetermined position, so that excessive movement of the table 41 is prevented. It becomes possible to do.

  The present invention is not limited to this embodiment. That is, in the description of the embodiment, many specific details are included for illustration, but various variations and modifications may be added to these details.

DESCRIPTION OF SYMBOLS 1 ... Three-dimensional modeling apparatus 11 ... Support frame 12 ... Reference | standard frame (support frame)
2. Energy beam irradiation unit (material supply unit)
21 ... Beam generating unit 22 ... Beam scanning unit 3 ... Powder supply unit (material supply unit)
DESCRIPTION OF SYMBOLS 31 ... Powder storage part 32 ... Leveling part 33 ... Outer frame part 4 ... Modeling object mounting part 41 ... Table 42 ... Slider 43 ... Ball screw (transmission part)
44 ... Deceleration part (transmission part)
45 ... Drive unit 46 ... Magnetic sensor (measurement unit)
47 ... Magnetic scale (measurement part)
48 ... Rod 49 ... Limit switch 50 ... Control unit 51 ... Input unit 52 ... Storage unit

Claims (7)

A support frame;
A material supply unit supported by the support frame;
One planar table on which the material supported by the support frame and supplied from the material supply unit is placed ;
A drive unit for driving the table;
A measuring unit for measuring the position of the table;
A control unit for controlling the drive unit based on the measurement value of the measurement unit;
With
The drive unit has at least a first drive unit and a second drive unit that can be driven independently,
The measurement unit has at least a first measurement unit and a second measurement unit for measuring the position of the table, respectively.
The control unit controls the first driving unit and the second driving unit independently based on measurement values of the first measurement unit and the second measurement unit, respectively. 3D modeling device. An input unit for inputting in advance an instruction movement amount of the table;
A storage unit that stores an instruction movement amount input from the input unit;
With
The three-dimensional modeling apparatus according to claim 1, wherein the control unit moves the table by an instruction movement amount stored in the storage unit. The three-dimensional modeling apparatus according to claim 1, wherein the control unit is fed back with a state signal of the driving unit. To any one of claims 1 to 3, further comprising a transmission unit having a first transmission section and a second transmission unit and transmits it first driver front SL and the driving force of the second drive unit to the table The three-dimensional modeling apparatus described. 5. The three-dimensional modeling apparatus according to claim 4 , wherein the first measurement unit and the second measurement unit are respectively arranged corresponding to support positions of the table, the first transmission unit, and the second transmission unit. The driving unit further includes a third driving unit and a fourth driving unit that can be driven independently,
The first driving unit, the second driving unit, the third driving unit, and the fourth driving unit are arranged at positions that form a quadrangle,
The transmission unit further includes a third transmission unit and a fourth transmission unit that transmit the driving force of the third driving unit and the fourth driving unit to the table,
The three-dimensional modeling apparatus according to claim 5 , wherein the control unit is capable of independently controlling the first drive unit, the second drive unit, the third drive unit, and the fourth drive unit. A rod that moves with the table;
A limit switch that contacts when the rod reaches a predetermined position;
The three-dimensional modeling apparatus according to any one of claims 1 to 6 .

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