Abstract: Aspects of the disclosure relate to wireless communication, and high-frequency filters with resonators. One aspect is a device including first and second busbars, and electrode fingers coupled between the busbars, with electrode fingers extending different distances toward an opposite busbar such that a second end of each of the electrode fingers collectively form wave shapes. The device further includes pluralities of gap reflectors positioned between the wave shapes and a nearest busbar.

Abstract: Method for scanning a workpiece surface (2A) of a metal workpiece (2), in which a blowtorch (3) having a welding wire electrode (4) is moved relative to the workpiece surface (2A) to determine scanning values and a wire end (4A) of the welding wire electrode (4) is repeatedly moved towards the workpiece surface (2A), in each case until contact with the metal workpiece (2) at a scanning position (P) on the workpiece surface (2A) of the metal workpiece (2) is detected, and the wire end (4A) of the welding wire electrode (4) is subsequently moved back, the blowtorch (3) detecting scanning values (d) at scanning positions (P), at least in some cases multiple times, to determine scanning measurement errors.

Abstract: Method and device for marking a workpiece surface (2A) of a metal workpiece (2), in which a welding torch (3) comprising a welding wire electrode (4) is guided along the workpiece surface (2A) to be marked and meanwhile a wire end (4A) of the welding wire electrode (4) is moved towards and away from the work-piece surface (2A) to be marked, wherein an electric voltage (U) present at the welding wire electrode (4) and/or an electric current (I) flowing through the welding wire electrode (4) bring about electric sparks, which bring about material removal and/or material alteration at the workpiece surface (2A) of the metal workpiece (2) to mark the workpiece surface (2A).

Abstract: In a method for scanning the surface of metallic workpieces, during scanning, a welding torch with a consumable welding wire is moved over and towards the workpiece surface, until contact of the welding wire with the workpiece is detected, and the welding wire is subsequently moved away from the workpiece. Before scanning, slag-removal is carried out to remove slag at the welding wire end, wherein the welding current is lowered to a minimum, and the welding wire is moved cyclically with a rapid recurrent forward/backward movement over a specified path length toward the workpiece, and by a smaller distance away from the workpiece, until a short circuit between the welding wire and the workpiece is detected, whereupon slag-removal is ended, and upon the detection of no short circuit, slag-removal is repeated, and upon the detection of several short circuits one after the other, slag-removal is ended.

Abstract: Method for scanning the surface (O) of metallic workpieces (W), wherein, during a scanning process before a welding process is carried out, a welding torch (1) with a meltable welding wire (2) is moved over the surface (O) of the workpieces (W), and at predefined times (ti) the welding wire (2) is moved towards the surface (O) of the workpieces (W) until a contact of the welding wire (2) with one of the workpieces (W) is detected, and the position (Pi) of the surface (O) of the workpieces (W) at each time (ti) is determined and stored in the welding power source (4), wherein an edge (K) is determined if the current position (Pi) of the surface (O) of the workpieces (W) exceeds at least one of the stored previous positions (Pi-n) of the surface (O) of the workpieces (W) by a predefined threshold value (S).

Abstract: In a method for scanning the surface of metallic workpieces, during scanning, a welding torch with a consumable welding wire is moved over and towards the workpiece surface, until contact of the welding wire with the workpiece is detected, and the welding wire is subsequently moved away from the workpiece. Before scanning, slag-removal is carried out to remove slag at the welding wire end, wherein the welding current is lowered to a minimum, and the welding wire is moved cyclically with a rapid recurrent forward/backward movement over a specified path length toward the workpiece, and by a smaller distance away from the workpiece, until a short circuit between the welding wire and the workpiece is detected, whereupon slag-removal is ended, and upon the detection of no short circuit, slag-removal is repeated, and upon the detection of several short circuits one after the other, slag-removal is ended.

Abstract: The invention relates to a welding process with a consumable welding wire (5), in particular a cold metal transfer (CMT) welding process for build-up welding, and also to a welding apparatus (1) for carrying out such a welding process.

Abstract: Welding device (1) for welding a workpiece (W) in a welding process (SP) which comprises different types of welding process phases (SPP), in which the workpiece (W) is welded in each case with a welding arc (LB) which extends between a welding wire electrode (SDE) of the welding device (1) and the workpiece (W), wherein for the welding process phases (SPP) an arc parameter, LBP, of the welding arc (LB), in particular its arc length, LBL, can be set, wherein the welding device (1) comprises a controller (4) which, during a welding process transition (SPÜ) between different types of welding process phases (SPP) of the welding process (SP), effects a change in the arc parameter, ?LBP, of the welding arc (LB) corresponding to the arc parameters, LBP, set for the welding process phases (SPP) and at the same time automatically adapts at least one transition welding parameter, ÜSP, of a welding current source (2) of the welding device (1) in dependence upon the effected arc parameter change, ?LBP, in order to stabil

Abstract: Method and device for marking a workpiece surface (2A) of a metal workpiece (2), in which a welding torch (3) comprising a welding wire electrode (4) is guided along the workpiece surface (2A) to be marked and meanwhile a wire end (4A) of the welding wire electrode (4) is moved towards and away from the work-piece surface (2A) to be marked, wherein an electric voltage (U) present at the welding wire electrode (4) and/or an electric current (I) flowing through the welding wire electrode (4) bring about electric sparks, which bring about material removal and/or material alteration at the workpiece surface (2A) of the metal workpiece (2) to mark the workpiece surface (2A).

Abstract: A stable welding process for a welding method in which at least one welding device is used for welding. During the welding process carried out using the welding device, synchronization information is transmitted to the at least one welding device from at least one other electric device, in which a device current that changes over time flows in a device current circuit at least at one point in time, and the at least one welding device is designed to use the obtained synchronization information in order to ignore measurement values detected at the point in time for the measurement variable.

Abstract: Method for scanning the surface (O) of metallic workpieces (W), wherein, during a scanning process before a welding process is carried out, a welding torch (1) with a meltable welding wire (2) is moved over the surface (O) of the workpieces (W), and at predefined times (ti) the welding wire (2) is moved towards the surface (O) of the workpieces (W) until a contact of the welding wire (2) with one of the workpieces (W) is detected, and the position (Pi) of the surface (O) of the workpieces (W) at each time (ti) is determined and stored in the welding power source (4), wherein an edge (K) is determined if the current position (Pi) of the surface (O) of the workpieces (W) exceeds at least one of the stored previous positions (Pi-n) of the surface (O) of the workpieces (W) by a predefined threshold value (S).

Abstract: In order to develop a welding process in such a way that uniform flaking of a weld seam can be guaranteed even with a higher number of short-circuit cycles, a specific number of short-circuit cycles is specified for the cold welding phase and the cold phase duration of the cold welding phase is determined for a number of short-circuit cycles that exceeds a specified limit cycle number, depending on a determined cold phase time and after the cold welding phase, there is a switch to the hot welding phase.

Abstract: The invention relates to an arc welding method using a consumable welding wire (1), wherein in successive welding cycles (SZ) during a welding process (Pi) a certain welding current (I(t)) is applied to the welding wire (1) and the welding wire is moved with a certain wire conveying speed (v(t)) towards a workpiece (2) to be processed. The aim of the invention is to further improve the stability of the welding method. The aim is achieved, according to the invention, in that in the event of a change of the welding process (P1) to a welding process (P2) with an increased mean wire conveying speed (vmean) during a welding cycle (SZ) and/or with an increased mean welding current (Imean) during a welding cycle (SZ), a lowering phase (AP) is initiated, wherein in the lowering phase (AP) the welding current (IA(t)) is lowered for a specified duration (?tA).

Abstract: A component for guiding an airflow in an air-conditioning system of an aircraft includes at least one structural part, at least one inlet opening and at least one outlet opening for air. At least two partial shells are interconnected in an airtight manner in such a way that the inlet openings and the outlet openings remain clear. The partial shells are particle foam parts. A method for producing the component incudes forming the partial shells of particle foam, and interconnecting the partial shells to form the component.

Abstract: This disclosure relates to a cutting tool, having a main body, a cutting head, which is joined to the free end of the main body and is formed, by primary shaping, as a sintered piece provided with at least one cutting edge, and a cooling lubricant feed, which is led through the main body axially and which has a cooling lubricant distributor inserted into the cutting head for redirecting cooling lubricant into the region of the at least one cutting edge. According to this disclosure, a plurality of protruding spacers for keeping a gap clear with respect to the cooling lubricant distributor and/or the main body are sintered on a supporting surface of the cutting head as primary shaped elements.

Abstract: Method and device for marking a workpiece surface (2A) of a metal workpiece (2), in which a welding torch (3) comprising a welding wire electrode (4) is guided along the workpiece surface (2A) to be marked and meanwhile a wire end (4A) of the welding wire electrode (4) is moved towards and away from the work-piece surface (2A) to be marked, wherein an electric voltage (U) present at the welding wire electrode (4) and/or an electric current (I) flowing through the welding wire electrode (4) bring about electric sparks, which bring about material removal and/or material alteration at the workpiece surface (2A) of the metal workpiece (2) to mark the workpiece surface (2A).

Abstract: A short circuit welding method with successive welding cycles with a respective arc phase and short circuit phase includes controlling at least the welding parameters welding current and feed speed of a melting electrode and feeding the electrode toward of a workpiece at a predetermined forward final speed at least during part of the arc phase and away from the workpiece at a predetermined rearward final speed at least during part of the short circuit phase. A device carries out this method. A change in the feed speed and a rearward final speed are predetermined and a welding current is controlled to complete the short circuit phase after reaching the rearward final speed and after 3 ms at the latest and repeat every 8 ms at the latest. The welding parameters are controlled such that the welding cycle duration?8 ms, resulting in a welding frequency?125 Hz.

Abstract: Method for scanning a workpiece surface (2A) of a metal workpiece (2), in which a blowtorch (3) having a welding wire electrode (4) is moved relative to the workpiece surface (2A) to determine scanning values and a wire end (4A) of the welding wire electrode (4) is repeatedly moved towards the workpiece surface (2A), in each case until contact with the metal workpiece (2) at a scanning position (P) on the workpiece surface (2A) of the metal workpiece (2) is detected, and the wire end (4A) of the welding wire electrode (4) is subsequently moved back, the blowtorch (3) detecting scanning values (d) at scanning positions (P), at least in some cases multiple times, to determine scanning measurement errors.

Abstract: A short circuit welding method with successive welding cycles with a respective arc phase and short circuit phase includes controlling at least the welding parameters welding current and feed speed of a melting electrode and feeding the electrode toward of a workpiece at a predetermined forward final speed at least during part of the arc phase and away from the workpiece at a predetermined rearward final speed at least during part of the short circuit phase. A device carries out this method. A change in the feed speed and a rearward final speed are predetermined and a welding current is controlled to complete the short circuit phase after reaching the rearward final speed and after 3 ms at the latest and repeat every 8 ms at the latest. The welding parameters are controlled such that the welding cycle duration?8 ms, resulting in a welding frequency?125 Hz.

Abstract: This disclosure relates to a cutting tool, having a main body, a cutting head, which is joined to the free end of the main body and is formed, by primary shaping, as a sintered piece provided with at least one cutting edge, and a cooling lubricant feed, which is led through the main body axially and which has a cooling lubricant distributor inserted into the cutting head for redirecting cooling lubricant into the region of the at least one cutting edge. According to this disclosure, a plurality of protruding spacers for keeping a gap clear with respect to the cooling lubricant distributor and/or the main body are sintered on a supporting surface of the cutting head as primary shaped elements.