Trajectory plan creation assistance method, trajectory plan creation assistance device, additive manufacturing method, additive manufacturing device, and program

A non-transitory computer-readable recording medium storing a program for executing procedures of a trajectory plan creation assistance method for assisting creation of a trajectory plan, the trajectory plan including a bead formation trajectory for forming a weld bead when melting and solidifying a filler metal held by a manipulator while moving the filler metal by the manipulator to form the weld bead and laminating the formed weld bead to produce a manufacturing object, the program being configured to cause a computer to execute

• a procedure of acquiring shape data of the manufacturing object;
• a procedure of decomposing a three-dimensional shape model based on the shape data into a plurality of linear models each having a polygonal vertical cross section in a longitudinal direction;
• a procedure of setting a bead formation locus for forming the weld bead along the linear model and the bead formation trajectory including a lamination order of the weld bead;
• a procedure of generating a plurality of polygonal columnar unit blocks obtained by dividing the linear model into unit lengths along the set bead formation locus;
• and
• a procedure of creating the trajectory plan by simulating the formation of the weld bead for each of the unit blocks by simulation.