Method of manufacturing a tube snap fastening arrangement

Method for manufacturing a fastening arrangement for fastening a tube to a collar in a furniture of fitting arrangement, the method comprising steps of:

• a) providing a hollow tube, the tube having a material thickness surrounding the circumference of the tube forming an inner surface towards the hollow of the tube and an outer surface facing radially outwards,
• b) arranging said tube for receiving at least one forming punch in the axial direction of the tube,
• c) punching said tube with a forming punch at an inner radial part of an edge portion of the tube in the axial direction of the tube, locally reducing the tube thickness, so that the material being punched is plastically relocated from the edge portion to a location along the inner surface of the tube, locally forming a snap portion in the form of a flange in the radial direction towards the hollow inside of the tube,
• d) providing a collar configured to be arranged on said tube, wherein the collar comprises at least one receiving portion configured to receive said snap portion (11a-h), and
• e) arranging the collar to the tube such that the snap portion engages with said receiving portion.