Method for controlling a welder

Patent metadata

Field	Value
Publication number	US-9492879-B2
Application number	US-73634809-A
Country	US
Kind code	B2
Filing date	Mar 19, 2009
Priority date	Apr 21, 2008
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

A method for controlling a welder including a fusible electrode stores the values of the welding parameters required for a welding process in a storage device and saves the values as so-called characteristic curves through at least one support point per characteristic curve. A working point is set by a value for the heat input into a workpiece and a value for the wire feed speed. Upon adjustment of any of the values to a welding application the other value is kept constant by a calculation method designed such that a plurality of characteristic curves that are compatible with one another are combined to form a characteristic curve field per welding process and the welding parameters of all support points of the characteristic curves of the characteristic curve field are saved according to defined values of specific welding parameters.

First claim

The invention claimed is:

1. A method for controlling a welder with a consumable electrode for welding a workpiece, the method comprising steps of:
providing a welder and providing a memory device, the welder comprising a control panel,
storing in the memory device welding parameter values of welding parameters each required for a welding process, wherein the welding parameter values are stored in the form of a plurality if characteristic curve fields each comprising several characteristic curves through at least one support point per characteristic curve,
each support point including all of the welding parameter values required for a respective welding process,
each characteristic curve field comprising several characteristic curves from a respective pure welding process,
the plurality of characteristic curve fields being coupled to one overall characteristic curve field,
a first characteristic curve field of the plurality of characteristic curve fields being for one of a pulse welding process, a CMT welding process and a negatively poled welding process,
a second characteristic curve field of the plurality of characteristic curve fields being for a different one of a pulse welding process, a CMT welding process, and a negatively poled welding process,
and a mixed region being located between the first characteristic curve field and the characteristic curve field,

setting a working point via the control panel for the welding of the workpiece, and
adjusting via the control panel the working point to form an adapted working point in one of the first characteristic curve field and the second characteristic curve field, the adapted working point including respective values of the welding parameters, the adjusting occurring by adapting a first value to a welding application, the first value being selected from the group consisting of a heat input value for heat input into the workpiece and a wire feed speed value for wire feed speed, wherein when adapting said first value, a second different value selected from said group is kept constant and the adapted working point is automatically determined by a calculation method from at least two support points of at least one of the first and second characteristic curve fields,
wherein a first support point of the at least two support points is from the first characteristic curve field and a second support point of the at least two support points is from the second characteristic curve field,
completing the welding application by cyclically alternating the pure welding process of the first characteristic curve field corresponding to one of the pulse welding process, the CMT welding process and the negatively poled welding process, and the pure welding process of the second characteristic curve field corresponding to a different one of the pulse welding process, the CMT welding process, and the negatively poled welding process, thereby automatically combining and cyclically alternating two different pure welding processes in order to achieve and keep constant the second different value selected from the group consisting of the heat input value and the wire feed speed value while the first value selected from the group consisting of the heat input value and the wire feed speed value is altered, and
wherein a number of welding cycles of the welding process is calculated by the calculation method.

2. The method according to claim 1 , wherein the welding parameters of the support points for different heat input values of the heat input into the workpiece are each stored at a constant wire feed speed value of the wire feed speed.

3. The method according to claim 1 , wherein an intermediated point is determined from several support points by the calculation method, said intermediate point having an intermediate heat input value for the heat input.

4. The method according to claim 1 , wherein the mixed region comprises mixed characteristic curves comprising support points between the first and second characteristic curve fields.

5. The method according to claim 1 , wherein the heat input value for the heat input into the workpiece is determined from a total output provided by a welder for the welding process, based on a welding voltage and a welding current.

6. The method according to claim 1 , wherein the value for the heat input for the heat input into the workpiece is adapted by changing the shapes of the curves of the welding parameters.

7. The method according to claim 1 , wherein an intermediate point from the first characteristic curve field is also used in the calculation method to automatically determine the adapted working point.

8. The method according to claim 1 , wherein the working point set via the control panel is in the mixed region.

Assignees

• Kazmaier Joerg
• Haselsteiner Marco
• Schauer Andreas
• Trauner Gernot
• Fronius Int Gmbh

Inventors

• Kazmaier Joerg
• Haselsteiner Marco
• Schauer Andreas
• Trauner Gernot

Classifications

• B23K9/0953 Primary

  using computing means · CPC title