Welding head

• US 6,911,615 B2
• Filed: 10/31/2001
• Issued: 06/28/2005
• Est. Priority Date: 11/02/2000
• Status: Expired due to Fees

• Current Assignee: Kombi Tec GmbH
• Original Assignee: Kombi Tec GmbH
• Inventors: Reischmann, Leander
• Primary Examiner(s): Kerns, Kevin P.
• Application Number:
  US10/415,826
• Publication Number:
  US 20040011766A1
• Time in Patent Office: 1,336 Days
• Field of Search: 219/86.51, 219/91.1, 219/109, 219/110
• US Class Current: 219/86.51
• CPC Class Codes: B23K 11/253 the measured parameter being a displacement or a position
• CPC Class Codes: B23K 11/255 the measured parameter being a force B23K11/253 takes precedence
• CPC Class Codes: B23K 11/315 with one electrode moving on a linear path

Abstract

A welding head for connecting weld members by resistance welding includes an infeed cylinder having a piston rod, an electrode movable via the cylinder; and a sensor arranged between the piston rod of the infeed cylinder and a readjusting spring for the rapid readjustment of the electrode. The sensor is clamped in place between contact means in a sleeve-shaped or tubular drive shaft mounted in a housing.

Claims

1. A welding head for connecting weld members by resistance welding, said welding head comprising:

an infeed cylinder having a piston rod;

an electrode movable via the cylinder; and

a sensor arranged between the piston rod of the infeed cylinder and a readjusting spring for rapid readjustment of the electrode, wherein the sensor is clamped in place between contact means in a sleeve-shaped or tubular drive shaft mounted in a housing.

2. The welding head according to claim 1, wherein the sensor includes a pressure sensor for force measurement.

3. The welding head according to claim 1, wherein the sensor is arranged in the housing of the welding head or in a readjusting unit.

4. The welding head according to claim 1, further comprising a plunger in cooperation with the infeed cylinder wherein the housing at least partly accommodates the shaft and the plunger.

5. The welding head according to claim 1, wherein the sensor is arranged in the shaft.

6. The welding head according to claim 1, wherein the sensor is firmly connected to the shaft.

7. The welding head according to claim 1, wherein the shaft is designed as a readjusting-spring infeed shaft.

8. The welding head according to claim 1, wherein the sensor is clamped in place and calibrated between the contact means with a cap screw and a centering bush.

9. The welding head according to claim 1, wherein the contact means are designed as turned parts.

10. The welding head according to claim 1, wherein the piston rod of the infeed cylinder is coupled to the sensor.

11. The welding head according to claim 1, further comprising welding-gun elements mounted in a longitudinally displaceable manner relative to one another on longitudinally displaceable guide slides wherein, in order to avoid different torques on a guide means which are caused by forces acting on the welding electrodes, the welding-gun elements are mounted on a common shaft.

12. The welding head according to claim 11, the common shaft has a circular cross section.

13. The welding head according to claim 11, wherein the guide slides can travel relative to cue another toward the weld members virtually free of force.

14. The welding head according to claim 11, wherein a separate readjusting unit which corrects the welding electrodes during the welding operation is assigned to at least one welding-gun element.

15. The welding head according to claim 14, wherein the readjusting unit contains a force-measuring device.

16. The welding head according to claim 11, wherein the welding-gun elements are mounted in a floating manner relative to one another on the common shaft and further comprising a drive-cylinder unit arranged to cause the first welding-gun element to be moved by means of a drive-cylinder piston rod and the second welding-gun element to be moved by means of a cylinder housing of the drive-cylinder unit or by means of a drive cylinder.

17. The welding head according to claim 1, wherein the piston rod of the infeed cylinder is coupled to the shaft via a C-guide.

18. A welding gun with two welding electrodes fixed to welding-gun elements wherein the welding-gun elements are mounted in a floating manner relative to one another on a common shaft wherein at least one of the two welding-gun elements carries a welding head according to claim 1.

20. The welding head according to claim 1, wherein the sensor is calibrated between the contact means in a sleeve-shaped or tubular drive shaft mounted in a housing.

19. A welding head for connecting weld members by resistance welding, said welding head comprising:

an infeed cylinder having a piston rod;

an electrode movable via the cylinder; and

a sensor arranged between the piston rod of the infeed cylinder and a plunger with a readjusting spring for rapid readjustment of the electrode, wherein the sensor is clamped in place and calibrated between contact means in a sleeve-shaped or tubular drive shaft mounted in a housing, and wherein the plunger is guided in the drive shaft.