Abstract: An ultrasonic welding/cutting machine includes an ultrasonic machining unit including a machining roller and a tool horn to which ultrasonic waves are transmitted. The ultrasonic machining unit welds or cuts a sheet material such as unwoven fabric by feeding the sheet material between the machining roller and the tool horn. The machine further includes the construction for moving the ultrasonic machining unit in a direction generally perpendicular to a direction in which the sheet material is fed, the construction for rotating the machining roller on its axis, and the construction for turning the machining roller.

Abstract: An NC machine surrounded by a housing provided with a door on a front surface of the housing so that a workpiece may be loaded into the housing and unloaded therefrom when the door is in an open condition. An articulated robot, for replacing the workpiece, is provided so as to be laterally movable along an opening and closing direction of the door. Such a laterally movable function of the articulated robot permits a hand of the robot to grip a desired one of the workpieces arranged in lateral and longitudinal directions on a stock table. The articulated robot is provided with a sensor for detecting a dog provided on the door and an air cylinder for connecting the robot to the door when the dog is detected by the sensor. Accordingly, after the robot is connected to the door by the air cylinder, the door can be opened and closed by the lateral movement of the articulated robot.