| 摘要 |
The invention relates to a method for producing a rim hole (20, 26, 30) in hollow profiles (1), wherein a tubular piece (9) in pushed into the hollow profile (1) and is placed therein in such a way that it coaxially encompasses the spot of the rim hole (20, 26, 30) to be produced. The hollow profile (1) is then impinged upon from the outside towards the inside in said spot by means of a tool thus forming the rim hole (20, 26, 30). In order to make it possible to produce a rim hole (20, 26, 30) in hollow profiles (1) in a relatively easy manner, wherein said rim hole complies with high rigidity requirements even if the wall thickness of the hollow profile (1) is small, two opposite holes (8) are initially punched out from the hollow profile (1), at least one of said holes having a diameter that is smaller than the diameter of the rim hole (20, 26, 30) to be produced. The tubular piece (9) is then inserted into the interior (17) of the hollow profile so that it comes to rest coaxially in relation to the common axis (10) of the holes (8). The hollow profile material of the hollow profile section (18, 23, 29) located between the edge (12) of the hole and the inner side (16) of the tubular piece (9) is drawn in until it rests flatly on the inner side (16) of the tubular piece (9) in the interior (17) of the hollow profile using at least one punching tool (7, 13). |
