Device for increasing the adherence of a coating thermally sprayed on a metal surface, in particular on a surface of a cylinder casing barrel of a vehicle engine

摘要

The device comprises a cylindrical main body (1), a thumb wheel (10), a mechanism for rotating the wheel around the device to make impressions, against deformations, on a surface of a barrel (50), and a translation mechanism. The wheel comprises peripheral profiles including a lower profile adapted to create grooves in the surface of the barrel, and an upper profile adapted to create a flare in right pattern, by hardening, formed between the grooves. The lower profile has square or rectangular section, and the upper profile has a V-shaped projecting section. The device comprises a cylindrical main body (1), a thumb wheel (10), a mechanism for rotating the wheel around the device to make impressions, against deformations, on a surface of a barrel (50), and a translation mechanism. The wheel comprises peripheral profiles including a lower profile adapted to create grooves in the surface of the barrel, and an upper profile adapted to create a flare in right pattern, by hardening, formed between the grooves. The lower profile has square or rectangular section, and the upper profile has a V-shaped projecting section. The wheel is mounted: on a rotation axis at a distance from an axis of the main body; and between ball bearings to ensure its movement at the surface of the barrel. The rotation axis of the wheel is inclined at an angle, with respect to the axis of main body of the device, of 1-10[deg] . A space between the profiles is 0.1-20 mm. An independent claim is included for a process for increasing an adherence of a coating provided, by thermal spraying, on a metal surface of a barrel of a crankcase of a motor vehicle.