ADDITIVE MANUFACTURING APPARATUS AND ADDITIVE MANUFACTURING METHOD
FIG5 is a view for explaining a stacking pitch of the beads when the beads illustrated in FIG2 are stacked and the amount of movement of a feeding position in a direction of a width of a bead
FIG5 is a view for explaining a stacking pitch of the beads 22 when the beads 22 illustrated in FIG2 are stacked and the amount of movement of the feeding position in a direction of the width BW of the bead 22. The feeding position is a position to which the wire 7 is fed. A stacking pitch BP is an interval between the feeding positions in the vertical direction. The stacking pitch BP of the bead 22 stacked at an i-th time is denoted by a stacking pitch BPi. "i" is an arbitrary integer that is 1 or more. In the first embodiment, stacking pitches BP1, BP2, BP3, ... are equal to one another. The stacking pitch BPi is stored in the database in the storage device 5 in advance. The stacking pitch BPi is a parameter for building a deposit by stacking the beads 22 in the vertical direction.
view
2
substrate
22
bead beads
['1. An additive manufacturing apparatus (1) for building a deposit on a substrate (2), the apparatus comprising: a feeding unit (6, 8) to feed a build material (7) to a feeding position; an irradiation unit (10, 11, 12) to irradiate the feeding position with a laser beam that melts the build material; a control unit (3) to perform control for building the deposit by stacking beads formed by movement of the feeding position with respect to the substrate and melting of the build material; and an arithmetic unit (4) to execute an arithmetic process of computing parameters for the control unit to perform the control, wherein the beads include two beads (22-1, 22-2) stacked on each other, the two beads are a first bead (22-1) and a second bead (22-2) stacked on the first bead, the first bead being formed earlier than the second bead, the feeding position being a first position (C1) in formation of the first bead, the feeding positon being a second position (C2) in formation of the second bead,  characterized in that  the arithmetic unit calculates an interval (KS) between the first position and the second position in a set direction on a basis of a width (BW) of the first bead and a diameter (LD) of the laser beam, the set direction being a direction of the width of the first bead, and the control unit performs control for setting the second position to a position shifted from the first position in the set direction by the interval, so as to allow a part of the second bead to protrude from the first bead in the set direction.']