A method for welding together a first component made of a thermoplastic layer composite material having multiple layers and a second component made of a thermoplastic layer composite material having multiple layers comprising the following steps: - removing of material of the layer composite material of the first component along a first longitudinal edge of the first component by means of a laser beam in order to form a first step structure having a plurality of steps on the first longitudinal edge, with each step of the first step structure being formed by one other or several others of the layers of the layer composite material of the first component, and having a surface section parallel to the direction of extension of the layers and a front section transverse to the direction of extension of the layers, - removing of material of the layer composite material of the second component along a second longitudinal edge of the second component by means of a laser beam in order to form a second step structure having a plurality of steps on the second longitudinal edge, wherein - each step of the second step structure is formed by one other or several others of the layers of the layer composite material of the second component, and has a surface section parallel to the direction of extension of the layers and a front section transverse to the direction of extension of the layers, and - the first component and the second component are able to be disposed with their step structures in an abutting position, in which position the surface section of each step of the first step structure or a consecutive subset of the steps of the first step structure in each case abuts a surface section of a step of the second step structure, - arranging the first component and the second component in the abutting position, and - subsequently welding together the first component and the second component, by welding together the abutting surface sections (3a, 3b) of the steps of the first and second step structures. - removing of material of the layer composite material of the first component along a first longitudinal edge of the first component by means of a laser beam in order to form a first step structure having a plurality of steps on the first longitudinal edge, with each step of the first step structure being formed by one other or several others of the layers of the layer composite material of the first component, and having a surface section parallel to the direction of extension of the layers and a front section transverse to the direction of extension of the layers, - removing of material of the layer composite material of the second component along a second longitudinal edge of the second component by means of a laser beam in order to form a second step structure having a plurality of steps on the second longitudinal edge, wherein - each step of the second step structure is formed by one other or several others of the layers of the layer composite material of the second component, and has a surface section parallel to the direction of extension of the layers and a front section transverse to the direction of extension of the layers, and - the first component and the second component are able to be disposed with their step structures in an abutting position, in which position the surface section of each step of the first step structure or a consecutive subset of the steps of the first step structure in each case abuts a surface section of a step of the second step structure, - each step of the second step structure is formed by one other or several others of the layers of the layer composite material of the second component, and has a surface section parallel to the direction of extension of the layers and a front section transverse to the direction of extension of the layers, and - the first component and the second component are able to be disposed with their step structures in an abutting position, in which position the surface section of each step of the first step structure or a consecutive subset of the steps of the first step structure in each case abuts a surface section of a step of the second step structure, - arranging the first component and the second component in the abutting position, and - subsequently welding together the first component and the second component, by welding together the abutting surface sections (3a, 3b) of the steps of the first and second step structures.