Class 219/61.5 - With condition responsive control of the welding process

Subclass of Class 219 - Electric heating
Definition: Subject matter wherein the control means of the welding
No. of patents: 22
Last issue date: 03/23/2010

Number	Title	Issue Date
7683288	System and method of computing the operating parameters of a forge welding machine A system and method for computing the parameters of a forge welding machine for the forge welding of one or more materials is provided. A computer program executes a self-tuning routine to compute the operating frequency and operating power setting for the forge wel...	03/23/2010
7282663	Forge welding process An automated method for forge welding tubulars including heating the tubular ends to be joined in a welding chamber while the heated tubular ends are maintained aligned and parallel relative to each other and at a small spacing, whereupon the heated tubular ends are...	10/16/2007
6941826	Method and device for detecting abrasions of electrodes in stationary welding gun A method for detecting abrasion of both a moving side electrode (2) and a fixing side electrode (3) of a stationary type welding gun in which the moving side electrode (2) and the fixing side electrode (3) opposed to the moving side elect...	09/13/2005
6911632	Method for controlling the position of a foil strip edges A method for controlling the edges (7, 7′) of a foil strip guided in a shaping funnel of a device producing tubular bodies from the foil strip by an overlapping weld seam using a guide wedge, the strip being then welded. According to the invention, after we...	06/28/2005
5889262	System for and method of automatically controlling amount of input heat in high-frequency electric resistance welding machine A system and a method for automatically controlling an input heat amount of a high-frequency electric resistance welding machine. The automatic input heat amount control system includes a coil antenna for sensing a spark signal which is generated by elect...	03/30/1999
5886314	Pipe cutting apparatus A profiled end cut is applied to a length of stock pipe in an apparatus wherein the pipe is rotated by a drive head with a plasma cutter moved axially on a trolley in synchrony with rotation under control of a guidance system. The guidance system follows ...	03/23/1999
5679272	Method of welding containers and apparatus therefor When welding a series of container bodies, the welding speed is at first increased to prevent the first body from colliding with the second body at the intake to the welding machine. The welding speed is then reduced to a rated welding speed Vs...	10/21/1997
5376766	Weld quality monitoring and control system for a tube mill A welded tube monitoring and control system includes a programmable logic controller (PLC) which receives data from a plurality of input apparatus which monitor the tube manufacturing process, and which generates output data to control various components ...	12/27/1994
5265787	Welding management apparatus A welding management apparatus for use with a tube production machine. A workpiece fed from a roll of metal strip is formed in a tubular formation having side surfaces opposite to each other. An upsetting pressure is applied to joint the opposite side sur...	11/30/1993
4896812	Double downhill pipe welder A pipe welding apparatus which utilizes a pair of welding electrodes which are at least ninety degrees spaced apart relative to a cylindrical workpiece. The welding procedure only occurs during movement of each welding electrode from an upper position to ...	01/30/1990
4881678	Process for the remote-controlled semi-automatic welding of two rotationally symmetrical components Welding is controlled from a control station (14) located at some distance from the welding zone. Before the start of a welding pass, the welding parameters are set by an operator, to whom the values to be given to the parameters as a function of the type...	11/21/1989
4700037	Machine for welding rounded body blanks The body blanks (10) are moved through, with overlapping longitudinal edges, between an inner and an outer electrode roller (14, 24), the axes (16, 26) of which lie substantially in a common plane (II--II) normal to the direction (A) of the axes of the bo...	10/13/1987
4626644	Method and apparatus for automatically producing thin-walled tubes A method for restarting the longitudinal welding seam when producing thin-walled tubes from a metal tape comprises the steps of starting welding with the tape in motion and the welding current amperage being gradually raised from zero to the steady state ...	12/02/1986
4621176	Method of and device for monitoring and/or controlling welding current in the high-frequency resistance pressure welding of pipes with longitudinal seams It is necessary to determine welding temperature as precisely as possible in order to properly control the high-frequency welding of longitudinal pipes. Changes in welding temperature are proportional to alterations in the welding current that flows throu...	11/04/1986
4535215	Method and device for controlling the welding process in the manufacturing of pipes with longitudinal seams It is necessary to determine the effects of welding pressure in order to control the high-frequency welding process in the manufacture of pipes with longitudinal seams. It has been discovered that measurements of the height of the welding bead provide an ...	08/13/1985
4497019	Programmable control system for controlling at least two parameters in a predetermined sequence using both analog and digital control signals A method and apparatus for controlling a work function, such as, for example, welding, requiring the control of at least one parameter according to a predetermined sequence, the apparatus including at least one work station where the work function is carr...	01/29/1985
4349397	Method and device for connecting pipe components made of weldable plastic Pipe components, i.e., pipes, adapting members and fittings made of weldable plastic, are interconnected by electrically weldable joints. The welding process is made possible by a welding sleeve 3 being connected to the output 4 of the device. A switch-on...	09/14/1982
4287402	Controlling upsetting during welding of a split tube Markings are placed alongside the gap of a split tube and their distance is measured downstream from the point of welding; the measuring result is used to control upsetting pressure in the weld print....	09/01/1981
4254323	Apparatus for monitoring and controlling a welding phenomenon in an electric resistance welding An apparatus for monitoring and controlling a welding phenomenon in an electric resistance welding process, which comprises a welding characteristics measuring instrument for carrying out digital measurement of at least one of high frequency welding chara...	03/03/1981
4144440	Method and apparatus for controlling welding operations during resistance welding A method of, and apparatus for, respectively controlling the start of welding and the termination of welding during continuous resistance welding with the aid of an alternating-current at a roll-welding machine, wherein at least at one measuring station o...	03/13/1979
4142084	Welding apparatus A machine for the automatic butt welding of pipes on tube plates by TIG or plasma process with or without weld metal, or of abutting pipes with TIG or plasma process with internal torch, comprising a control unit for programming the welding parameters acc...	02/27/1979
3944775	Welding process An internal spreader bar provides control of the convergence point and convergence angle of opposite electrically heated edges of a skelp during a tube seam welding operation and other controls are practiced to increase weld pressure at the faying surface...	03/16/1976

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Class 219/61.5 - With condition responsive control of the welding process