Disclosed is a method for aiding in manual handling of a work piece during machining, which method comprises the steps of: reading a predetermined work plan, comprising a required orientation of the work piece for each machining step of the work plan; detecting the orientation of the work piece; comparing the detected orientation of the work piece with the required orientation; and projecting an indication on the work piece for aiding to manually orient the work piece to the required orientation for the machining step to be performed. Al disclosed is a device for performing the method.

A system and method for vehicle assembly may include a vehicle body sensing unit sensing positions of vehicle bodies conveyed at regular intervals along a vehicle body convey line, a tool sensing unit disposed on a fastening tool for assembling parts to a vehicle body and sensing movement displacement of the fastening tool with respect to an origin of the fastening tool, a tool controller that transmits a fastening torque value of a predetermined part to the fastening tool in accordance with the movement displacement of the fastening tool and records an accumulated value of the movement displacement of the fastening tool, and a main controller that stores a result value of fastening the part, corresponding to a vehicle number of the vehicle body, on the basis of the accumulated value of the movement displacement of the fastening tool and positional information of the vehicle body.

Embodiments relate to a recliner automatic fastening system and a recliner automatic fastening method, which allow a cushion of a car seat and a nut of a back frame to be automatically fastened. The system includes an articulated robot installed along a conveyor line of a car seat, a vision check part checking a position of a nut temporarily fastened to the car seat using 2D vision sensing and then notifying the position to the articulated robot, and performing vision sensing on the nut that has been fastened, a nut fastening part installed on the articulated robot and fastening the nut when it moves to the position of the nut that is temporarily fastened by the articulated robot, and a fastening check part checking whether the nut is normally fastened using sensing data obtained by performing vision sensing on the fastened nut received from the vision check part.