Abstract

Disclosed are an Al-Mg-based, Al-Mg-Si-based, Al-Zn-based or Al-Si-based starting material in the form of a powder or wire for an additive manufacturing process, the use of said starting material, and an additive manufacturing process using said starting material.

IPC Classes  ?

• C22C 21/00 - Alloys based on aluminium

Abstract

The method for producing a thread in a workpiece comprises the following method steps: a) producing a number n = 1 of twisted grooves (22, 24) in a wall (21) of the workpiece (2) running around a thread axis (M) or producing a wall of the workpiece having a number n = 1 of twisted grooves and running around a thread axis, b) respectively inserting a thread producing region (32, 34), twisted to match the thread of the twisted grooves, of a tool (3) into each of the twisted grooves (22, 24) in a twisted inserting movement made to match the twist of the associated groove, c) producing a thread (36) in each wall subregion (23, 25), adjacent to the groove(s) (22, 24), of the wall of the workpiece by rotation of the workpiece (3) about the thread axis (M) and simultaneous axial advancement of the tool coaxially in relation to the thread axis at an axial rate of advancement made to match the rotating speed of the rotating movement and the pitch of the thread, wherein, during the rotation and simultaneous axial advancement, each thread producing region engages in the associated wall subregion and produces an associated part of a thread turn and, after the rotation, protrudes again into the same groove or another groove in the wall, d) moving each thread producing region (32, 34) of the tool out from the associated groove (24, 22) in a twisted withdrawal movement made to match the twist of the associated twisted groove.

IPC Classes  ?

• B23G 5/06 - Taps
• B23G 5/20 - Thread-cutting tools; Die-heads combined with other tools, e.g. drills
• B23G 7/02 - Tools for this purpose
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• F16B 37/08 - Quickly-detachable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut

Abstract

An example of a stable electrode structure is to use a gradient electrode that employs large platinum particle catalyst in the close proximity to the membrane supported on conventional carbon and small platinum particles in the section of the electrode closer to a GDL supported on a stabilized carbon. Some electrode parameters that contribute to electrode performance stability and reduced change in ECA are platinum-to-carbon ratio, size of platinum particles in various parts of the electrode, use of other stable catalysts instead of large particle size platinum (alloy, etc), depth of each gradient sublayer. Another example of a stable electrode structure is to use a mixture of platinum particle sizes on a carbon support, such as using platinum particles that may be 6 nanometers and 3 nanometers. A conductive support is typically one or more of the carbon blacks.

IPC Classes  ?

• H01M 8/1004 - Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
• H01M 4/92 - Metals of platinum group
• H01M 4/96 - Carbon-based electrodes

Abstract

The thread generating tool for producing a thread in a workpiece has the following features: a) the tool is rotatable about a tool axis (A), b) the tool has a number n = 1 of groove generating regions (42, 44) for respectively generating a groove in the workpiece and a number m = 1 of thread generating regions (32, 34) for generating the thread in the workpiece, c) each of the m thread generating regions is arranged behind one of the n groove generating regions in an axial projection parallel to the tool axis (A) and has in cross section in the axial projection a smaller extent than this groove generating region.

IPC Classes  ?

• B23G 5/04 - Dies
• B23D 13/00 - Tools or tool holders specially designed for planing or slotting machines
• B23G 3/00 - Arrangements or accessories for enabling machine tools not specially designed only for thread cutting to be used for this purpose, e.g. arrangements for reversing the working-spindle
• B23G 5/06 - Taps
• B23G 5/20 - Thread-cutting tools; Die-heads combined with other tools, e.g. drills
• B23G 7/02 - Tools for this purpose
• F16B 37/08 - Quickly-detachable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut