A press machine includes a display unit which displays a first image in a circular shape corresponding to a rotation of an eccentric mechanism and representing one stroke of slide operation and a second image in a circular-arc shape corresponding to an operation of an attachment device interlocked with the press machine, and an operation unit which receives an input operation. The first image indicates at least one slide operation region. The second image is placed concentrically with the first image in relation to the slide operation region. The second image has opposed ends each allowed to move in response to the input operation in a direction in which the second image extends.

A press machine includes a display unit which displays a first image in a circular shape corresponding to a rotation of an eccentric mechanism and representing one stroke of slide operation and a second image in a circular-arc shape corresponding to an operation of an attachment device interlocked with the press machine, and an operation unit which receives an input operation. The first image indicates at least one slide operation region. The second image is placed concentrically with the first image in relation to the slide operation region. The second image has opposed ends each allowed to move in response to the input operation in a direction in which the second image extends.

A workpiece display assistance device according to one aspect includes: a first model generation unit that obtains shape data of a workpiece to be set, and generates an original model based on the shape data; a second model generation unit that generates a plurality of matching models by rotating and/or inverting the original model; an extraction unit that matches each matching model to the original model and extracts aligned portions of the respective matching models with the original model as matching sections; a model creation unit that creates a matching aggregate model by aggregating the matching sections in a state conforming to the original model and synthesizing the matching sections aggregated; a determination unit that compares the original model and the matching aggregate model and makes a determination of a feature point on the workpiece; and a display unit that displays the feature point in a highlightable manner, along with an image of the workpiece, on a display screen based on the determination result.