Projection welding device

Patent metadata

Field	Value
Publication number	US-9802268-B2
Application number	US-201414520907-A
Country	US
Kind code	B2
Filing date	Oct 22, 2014
Priority date	Apr 17, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A projection welding gun device includes an upper welding tip and a lower welding tip that are combined with a gun body through a shank, where the upper welding tip presses an upper panel corresponding to a protrusion portion that is formed on a lower panel to weld the upper and lower panels, and a rotation unit that is rotated by a driving portion is disposed between the gun body and the shank to rotate the shank.

First claim

What is claimed is:

1. A projection welding gun device, comprising:
an upper welding tip and a lower welding tip that are combined with a gun body through a shank, wherein the upper welding tip presses an upper panel corresponding to a protrusion portion that is formed on a lower panel to weld the upper and lower panels; and
a rotation unit that is rotated by a driving portion, the rotation unit being disposed between the gun body and the shank to rotate the shank,
wherein the rotation unit includes:
a case that is disposed between the gun body and the shank;
the driving portion that is disposed in the case; and
a holder that is connected to the driving portion to be rotated thereby and the shank is vertically combined therewith, and
wherein the driving portion includes:
an air or hydraulic pressure cylinder;
a rack gear that is disposed on a rod of the cylinder; and
a pinion gear that is connected to an upper portion of the holder and is engaged with the rack gear.

2. The projection welding gun device of claim 1 , wherein the driving portion includes:
a step motor configured to control a rotation speed and a rotation direction;
a drive gear that is connected to a rotation shaft of the step motor; and
a driven gear that is connected to the upper portion of the holder and is engaged with the drive gear.

3. The projection welding gun device of claim 1 , wherein the holder is connected to the driving portion through a supporting member that is disposed in the case.

4. The projection welding gun device of claim 3 , wherein the supporting member is one of a bearing and a bushing.

5. A projection welding gun device, comprising:
an upper welding tip and a lower welding tip that are combined with a gun body through a shank, wherein the upper welding tip presses an upper panel corresponding to a protrusion portion that is formed on a lower panel to weld the upper and lower panels;
a rotation unit that is rotated by a driving portion, the rotation unit being disposed between the gun body and the shank to rotate the shank; and

a swivel unit disposed between the shank and the upper welding tip to make the upper welding tip contact the shank through a spherical surface,
wherein the rotation unit includes:
a case that is disposed between the gun body and the shank;
the driving portion that is disposed in the case; and
a holder that is connected to the driving portion and is rotated thereby, and the shank is vertically combined therewith, and
wherein the driving portion includes:
air or hydraulic pressure cylinder;
a rack gear that is disposed on a cylinder rod; and
a pinion gear that is connected to an upper portion of the holder and is engaged with a rack.

6. The projection welding gun device of claim 5 , wherein the driving portion includes:
a step motor configured to control a rotation speed and a rotation direction thereof;
a drive gear that is connected to a rotation shaft of the step motor; and
a driven gear that is connected to the upper portion of the holder and is engaged with the drive gear.

7. The projection welding gun device of claim 5 , wherein the holder is connected to the driving portion through a supporting member that is disposed in the case.

8. The projection welding gun device of claim 7 , wherein the supporting member is one of a bearing and a bushing.

9. The projection welding gun device of claim 5 , wherein the swivel unit includes:
a spherical body that is formed on an upper end of the upper welding tip; and
a rotation supporting portion that is formed in a lower end of the shank and contacts the spherical body through a spherical surface to be rotated.

10. The projection welding gun device of claim 5 , wherein the upper welding tip is one of a rectangle shape and a circular shape.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Cho Do-Woon
• Lim Chae Won
• Cho Yong Joon

Classifications

• B23K11/14 Primary

  Projection welding · CPC title

• B23K11/31

  Electrode holders {and actuating devices therefor} · CPC title

• B23K11/3009

  Pressure electrodes · CPC title

• B23K2101/006

  Vehicles · CPC title

• B23K2201/006

  Operations & Transport · mapped topic