Coating device and method for metal-coating of workpieces

A method for metal-coating of at least one workpiece with a coating device including a housing which surrounds a working space, the method comprising:

• retaining the at least one workpiece in the housing in the working space by means of a retaining apparatus, the at least one workpiece is arranged vertically and includes first and second workpiece surfaces opposite one another,
• coating the respective first and second workpiece surfaces of the at least one workpiece by means of first and second deposition apparatuses, the first deposition apparatus includes a first deposition nozzle and the second deposition apparatus includes a second deposition nozzle for applying a metal powder to the respective first and second workpiece surfaces to be coated, and the first deposition apparatus includes a first laser and the second deposition apparatus includes a second laser for locally melting the metal powder on the respective first and second workpiece surfaces to form a coating,
• moving the first and second deposition apparatuses relative to the respective first and second workpiece surfaces during coating by means of at least one movement apparatus, and
• supplying air into the working space via at least one air supply and discharging the air from the working space via at least one air discharge,
• wherein
• the air is supplied via the at least one air supply in an upper region of the working space above the at least one workpiece and the air is discharged via the at least one air discharge in a lower region of the working space below the at least one workpiece,
• the metal powder and/or dust adjacent to the at least one workpiece is suctioned away by means of at least one suction apparatus comprising at least one suction opening,
• the first deposition apparatus and the second deposition apparatus are arranged opposite one another in the working space of the housing and are configured to simultaneously apply and melt the metal powder to the respective first and second workpiece surfaces to form the coating.