A jaw assembly for a rivet setting tool the jaw assembly including a plurality of jaws each jaw defining part of an interlocking mechanism and an oppositely located part of another interlocking mechanism wherein adjacent jaws interlock via engagement of the parts of the interlocking mechanisms of the respective jaws for enabling radial movement of the jaws relative to each other while restricting axial movement of the jaws relative to each other.

The invention relates to a method for connecting at least two elements by a connecting element. The method comprises the steps of: providing a first element, a second element and the connecting element; placing the connecting element on a surface of the first element; in a first time period, rotating the connecting element at a first rotational speed and exerting a first axial force on the connecting element in the direction of the surface of the first element; and in a second time period, rotating the connecting element at a second rotational speed and exerting a second axial force on the connecting element in the direction of the surface of the first element.

An element, a friction element welding method, and a method for producing a friction element welded joint. The element is for performing friction element welding on a sheet stack of two or more stacked metal sheets by pressing the element into the sheet stack while the element is rotated. The element includes a circular columnar mandrel that is to enter the sheet stack, a circular collar disposed at an upper end portion of the mandrel, a first conical body extending from a lower end surface of the mandrel, and a second conical body disposed on the lower side of the first conical body. The vertical angle of the second conical body and the vertical angle of the first conical body satisfy the relation <.

The invention relates to a method for connecting at least two elements by a connecting element. The method comprises the steps of: providing a first element, a second element and the connecting element; placing the connecting element on a surface of the first element; in a first time period, rotating the connecting element at a first rotational speed and exerting a first axial force on the connecting element in the direction of the surface of the first element; and in a second time period, rotating the connecting element at a second rotational speed and exerting a second axial force on the connecting element in the direction of the surface of the first element.

The invention relates to a method for connecting at least two elements by a connecting element. A first element, a second element and the connecting element are provided. The connecting element is placed on a surface of the first element. In a first time period, the connecting element is rotated at a first rotational speed and a first axial force is exerted on the connecting element in the direction of the surface of the first element. In a second time period, the connecting element is rotated at a second rotational speed and a second axial force is exerted on the connecting element in the direction of the surface of the first element.