Embodiments herein relate processes for bulk solidifying amorphous metal alloys by rapid capacitor discharge.

The invention relates to a method (100) for manufacturing a fastening arrangement for fastening a collar to a tube. The method comprises the steps of providing a hollow tube (10), arranging said tube for receiving at least one forming punch (30) in the axial direction of the tube, punching the tube with a forming punch at an inner radial part of an edge portion (16) of the tube in the axial direction of the tube, locally reducing the tube thickness, so that the material being punched is plastically relocated in the axial direction, locally forming a snap portion (11) in the form of a flange (12) in the radial direction towards the hollow inside of the tube, providing a collar (20) configured to be arranged on the tube, wherein the collar comprises at least one receiving portion (21) arranged to receive said snap portion, and arranging the collar to the tube such that the snap portion engages with said receiving portion.

A method and a device are provided for simplifying a flow-hole screw process, in which the difference between a process parameter and its smoothed value is employed as a criterion for changing said process parameter or another process parameter in order in particular to be able to determine the changeover point between hole forming and thread forming.

Disclosed is a heat sink manufacturing method including the steps of: determining at least one cutting line in one direction from one side point on the processing surface; individually deriving fin-specific forward and backward lengths of the skiving cutter according to the separation distance of the at least one cutting line separated from the one side point; separating, on the basis of the fin-specific forward and backward lengths, at least one auxiliary fin and one main fin from the object by sequentially moving the skiving cutter forward and backward along the at least one cutting line; and processing the one main fin so that same stands upright relative to a base plate on which the object is stacked, so as to manufacture a heat sink formed in the shape of a plurality of fins branching upward from the one main fin.

A method of installing a flow drill screw (FDS) into a substrate includes engaging the FDS with an automatic tool and operating the tool at a first setting to drive the FDS into the substrate. The first setting rotates the FDS at a first rotational speed and applies a first axial feed force. The first setting causes flow of the substrate to permit the FDS to penetrate the substrate. The method includes detecting, via a sensor, axial position data of the FDS while operating the automatic tool and calculating, via a controller, volatility of the axial position data. The method includes switching the automatic tool from the first setting to a second setting in response to the volatility. The second setting rotates the FDS at a second rotational speed and applies a second axial feed force to the FDS. The second rotational speed is less than the first rotational speed.

A pressed article includes a main body, a recess portion, a pin, and a groove portion. The main body has a plate shape. The recess portion is provided in a first surface of the main body facing one side in a plate thickness direction of the main body. The pin is provided at a position corresponding to the recess portion on a side of a second surface opposite to the first surface of the main body, is formed to have an outer shape smaller than that of the recess portion when viewed in the plate thickness direction of the main body, and protrudes in the plate thickness direction of the main body. The groove portion is recessed from the second surface of the main body toward the first surface and is provided to surround at least a part of the periphery of the pin.

A flow drill screw is provided, which includes a head, a threaded section of a rod, and a tip portion; the head is configured to connect with an external tool; the threaded section of the rod is configured for self-tapping a plate; the tip portion is configured to penetrate the plate; the threaded section of the rod and the tip portion are made of different metal materials, and ends of the threaded section of the rod and the tip portion are connected and fixed by welding. By using two different materials to make the threaded section of the rod and the tip portion, it can cope with different plates and meet different usage scenarios, and save costs. This design enables the screw to perform well under various complex conditions, thereby improving its applicability and reliability, and has significant economic and social benefits.

A device and method for continuously producing an at least partly hollow shaft having a varying inner diameter includes forging tools that are arranged centrally symmetrically about a forging axis and are driven radially, a clamping chuck for holding an at least partly hollow cylindrical blank, and a counter-holder for axially supporting the blank. The counter-holder has a base and a counter-holder mandrel arranged on the base and extending axially into a central cavity in the blank. The mandrel is formed of at least two parts, wherein a first part of the counter-holder mandrel constitutes an inner part and a second part of the counter-holder mandrel constitutes an outer part surrounding the inner part. At least the outer part can be moved axially relative to the inner part.

A device and method for continuously producing an at least partly hollow shaft having a varying inner diameter includes forging tools that are arranged centrally symmetrically about a forging axis and are driven radially, a clamping chuck for holding an at least partly hollow cylindrical blank, and a counter-holder for axially supporting the blank. The counter-holder has a base and a counter-holder mandrel arranged on the base and extending axially into a central cavity in the blank. The mandrel is formed of at least two parts, wherein a first part of the counter-holder mandrel constitutes an inner part and a second part of the counter-holder mandrel constitutes an outer part surrounding the inner part. At least the outer part can be moved axially relative to the inner part.

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.