Abstract: A three-dimensional modeling apparatus 10, 11 includes a three-dimensional modeling unit 20, 40 and a control unit 15. The three-dimensional modeling unit 20, 40 is configured to stack unit layers ul made of a material solidified in a predetermined solidification pattern thereby to produce a three-dimensional object O. The control unit 15 is configured to correct a sectional pattern sp at each level in a model M along a lamination direction, allowing for deformation in modeling based on at least one of a material characteristic, a modeling condition, and a facility condition, thereby to determine the solidification pattern corresponding to the sectional pattern sp.

Abstract: On a near-bottom inner surface of a tilt piston cylinder hole, only a limited part that contacts an end of a tilt piston when the tilt piston is tilted by a pressing force from a swash plate is laser-hardened along the circumferential direction of the tilt piston cylinder hole (i.e., a hardened part is formed). In the tilt piston cylinder hole, parts other than a near-opening inner surface and the near-bottom inner surface are not laser-hardened.