Abstract: A method and a device monitors a working process, in which a workpiece is worked continuously along each of at least one working path during at least one working time period using a working tool arranged on a collaborative robot. The device includes a sensor apparatus for monitoring the environment of the collaborative robot and a detection device for detecting an object in a manipulation region around each working path of the collaborative robot. A working machine has a monitoring device of this type. The detection device is connected to a device for emitting an instruction signal within an instruction phase in the event that an object is detected in the manipulation region of a working path of the collaborative robot, so that the working process can be continued along the at least one working path without interruption.

Abstract: A welding apparatus comprises a welding unit for welding a workpiece. The welding unit comprises a welding assistance system for generating control commands by evaluating a voice dialogue performed with a welder, and a weld control unit for setting weld control parameters in dependence upon the control commands. A welding system includes a plurality of such welding apparatuses, wherein the welding assistance system is connected to the weld control units of the welding apparatuses via a data network. A method for welding a workpiece by means of a welding unit comprises providing a welding assistance system, evaluating a voice dialogue performed with a welder operating the welding unit, producing control commands for a weld control unit, and setting weld control parameters in dependence upon the produced control commands.

Abstract: The invention relates to a welding method and a welding system that use a welding torch, the position of which is determined. In order to develop such a welding method and system, with which it is possible to reliably determine the position of the welding torch in three dimensions, it is provided that a signal is emitted by a transmitter, the signal being received by at least one sensor which is integrated in or is associated with the welding torch, the received data readings being sent to an evaluation unit, which determines values relating to the position of the welding torch in three dimensions.

Abstract: The invention describes a remote access unit (31) and a method for managing welding devices (1) which are connected to a network (27) via interfaces (28), including a connection for connecting to the network (27), a display for displaying the welding devices (1) and their parameters and/or configurations, a memory for storing the parameters and/or configurations of the welding devices (1), and input units for operation.

Abstract: The invention relates to a welding method and a welding system that use a welding torch, the position of which is determined. In order to develop such a welding method and system, with which it is possible to reliably determine the position of the welding torch in three dimensions, it is provided that a signal is emitted by a transmitter, the signal being received by at least one sensor which is integrated in or is associated with the welding torch, the received data readings being sent to an evaluation unit, which determines values relating to the position of the welding torch in three dimensions.

Abstract: The invention relates to a method for operation of a welding unit (1), for the execution of welding processes with a welding device (2) and a welding torch (10), whereby operational states for the welding processes are recorded and, depending on the operational state, vibrations which may be felt are generated and a welding unit (1) and a welding torch (10), for carrying out said method. According to the invention, the possibility of providing feedback about particular operational states to people involved in the welding process, in particular, the welder, without the same having to look away from the welding spot or the arc (15) may be achieved, whereby, in particular, the welding current (I) or the welding voltage (V) are modulated, depending on the operational state, to generate acoustic vibrations in the arc occurring during welding, or, depending on the operational state, mechanical vibrations are generated.

Abstract: The invention relates to a method for operating a welding device (1), in addition to a welding device (1) comprising an energy source (2), especially a current source, which is controlled or regulated by means of a control device (4), at least one welding torch (10) or an electrode, at least one device for detecting operating states, such as the welding temperature, and at least one calculating unit (29) which is connected to the at least one detection device and is used to process the operating states. At least one device (35) is used to store instructions according to which the operating states are processed and states with which the processed operating states are compared. The inventive welding device also comprises at least one device (36) which is connected to the calculating unit (29) and is used to transmit messages to external receivers (37) in such a way that associated messages can be automatically transmitted to the external receivers (37) according to the results of said comparison.

Abstract: The invention describes a method of controlling a welding unit (1) and a current source (2), in which various welding parameters, such as a welding current, a welding wire diameter, a welding method etc., for example, can be set by a user from an input and/or output device (22). The welding unit (1) and the current source (2) are then activated by the control device (4) in accordance with the predetermined welding parameters, different desired values being stored in a memory device for the different welding parameters. The desired values for at least one welding parameter of a welding method are stored in the memory device for the minimum and maximum values in the form of a minimum and maximum curve and when a welding parameter falling between the minimum and maximum values or curves is retrieved or set, the control device (4) determines the other desired values of the other welding parameters of this welding process by means of a computing method, in particular by means of an interpolation calculation.

Abstract: To produce a blank mold for glass fiber optical waveguides with a core and a single or multilayer sheath, in which the core glass material is applied to the inner wall of a glass tube by chemical deposition from the vapor phase, the internally-coated glass tube is caused to collapse by temperature treatment, and this blank mold is finally drawn out into a glass fiber, the temperature treatment for collapse is carried out along the glass tube in accordance with a temperature profile that is determined by an upper region of maximum glass temperature along the treated section of glass tube (hot zone) and a lower region at the glass softening temperature (soft zone). The region of maximum glass temperature shows a largely uniform temperature level with a width along the section of glass tube that is approximately equal to the width of the region at the glass softening temperature.

Abstract: An optical waveguide preform is fabricated by inserting a rod inside a tube and collapsing the tube. The inner diameter of the tube is adjusted before inserting the rod to provide a predetermined gap width between the inner surface of the tube and the outer surface of the rod. The gap width is selected as a function of the cross sectional area of the tube in order to minimize core eccentricity in the finished waveguide.

Abstract: In the production of an optical waveguide preform, particularly for the production of mono-mode optical waveguides, a tube, or several tubes, of quartz glass are fused onto a crude preform rod of quartz glass. In a known device, the crude preform rod and the quartz glass tube slid over this are clamped at the same end into jaw chucks in the headstock of the glass lathe. Since it happens that optical waveguides that have been drawn from an optical waveguide preform produced with the known device show an inadmissibly high core eccentricity, it is proposed that another jaw chuck be provided in the tailstock for the other end of the tube preform.

Abstract: A method of making optical fibers by plasma chemical vapor deposition (PCVD) is disclosed wherein the pressure in the glass tube is maintained constant by controlling the rate of evacuation. The pressure-dependent controlled variable is preferably the impedance of the plasma-producing device, and the rate of evacuation is controlled in such a way that this impedance remains constant.