Method for regulating or controlling the conveyance speed of a wire composed of consumable material during a laser soldering or laser welding method, and laser soldering or laser welding device for carrying out such a method

2:

• The method according to claim 1, wherein the conveyance speed (vD) is increased to a predetermined boost speed (vD,Boost) which is at least 10 m/min, the conveyance speed (vD) preferably being increased with a speed change (ΔvD/Δt) of at least 2000 m/min/s.

3:

• The method according to claim 12, wherein, in order to preheat the wire (4), a current (I) is supplied to the wire (4), and a resulting voltage (UM) is measured, and the conveyance speed (vD) is temporarily increased to the predetermined boost speed (vD,Boost) as a function of this measured voltage (UM).

4:

• The method according to claim 3, wherein the current (I) through the wire (4) is additionally measured, and a resistance (R) is determined from the measured voltage (UM) and the measured current (I), and, if a resistance limit value (RG) is exceeded, the conveyance speed (vD) is increased to the predetermined boost speed (vD,Boost), and that wherein the conveyance speed (vD) is reduced again at the latest when the resistance limit value (RG) falls below.

5:

• The method according to claim 1, wherein the conveyance speed (vD) is reduced at least once by a predetermined conveyance speed amount (ΔvD1) for a predetermined period of time (Δt1) after the increase to the boost speed (vD,Boost).

6:

• The method according to claim 1, wherein the conveyance speed (vD) is again reduced to the mean conveyance speed (vD,M) before the increase when the voltage limit value (UG) or the resistance limit value (RG) falls below.

7:

• The method according to claim 1, wherein the conveyance speed (vD) is reduced to a mean conveyance speed (vD,M) increased by a predetermined conveyance speed amount (ΔvD2) when the voltage limit value (UG) or the resistance limit value (RG) falls below.

8:

• The method according to claim 7, wherein the mean conveyance speed (vD,M) increased by the conveyance speed amount (ΔvD2) is reduced at least once after a defined period of time (Δt2) has elapsed by a predetermined conveyance speed amount (ΔvD3), until the mean conveyance speed (vD,M) is reached again.

9:

• The method according to claim 1, wherein the current (I) is regulated or controlled by the wire (4) by reducing the current (I), after increasing the wire conveyance speed (vD), to the boost speed (vD,Boost), preferably by a predetermined current amount (ΔI).

10:

• Method according to claim 1, wherein the conveyance speed (vD) of the wire (4) is detected and a noise signal (vD,noise) is generated therefrom, and, if a noise signal threshold (vD,noise,S) is exceeded, the regulation or control of the conveyance speed (vD) is deactivated.

11:

• The method according to claim 10, wherein a warning is issued when the noise signal threshold (vD,noise,S) is exceeded.

12:

• A laser soldering or laser welding device (1), comprising a laser unit (2) for melting a wire (4) of consumable material, a wire conveyance device (3) for conveying the wire (4) at a conveyance speed (vD) in the direction of a workpiece (5) to be processed, and a circuit for measuring the voltage (U) between the wire (4) and the workpiece (5), wherein the laser soldering or laser welding device (1) comprises a regulating or control device (6) which is designed to carry out the method according to claim 1.

13:

• The laser soldering or laser welding device (1) according to claim 12, wherein the wire conveyance device (3) is formed by a gearless direct drive.

14:

• The laser soldering or laser welding device (1) according to claim 12, wherein the wire conveyance device (3) for conveying the wire (4) is designed with a conveyance speed of at least 10 m/min, preferably with a speed change (ΔvD/Δt) of at least 2000 m/min/s.