The invention provides a gripper for a tack welding gun wherein the tack gripper is u-shaped in design. The tack gripper has two arms connected by a base. At least one arm of the tack gripper is resilient in design. The arms have a bent back portion at their free end. The portion is arranged between the respective arms. The portions contain holes in which the catch knobs formed on the workpiece to be welded can engage.
|
1. A tack gripper for a tack welding gun, characterized in that the tack gripper (1) is designed in the form of a u with two arms (2, 3) connected via a base (4), at least one free arm (2, 3) of the tack gripper (1) being resilient.
0. 24. A gripper for holding a workpiece in a welding gun for presentation to and attachment by welding on a body, said gripper comprising:
a mounting base ( a pair of metal arms ( the free ends of said arms being bent in a u-shape and extending back toward said base; and at least one of said arms being resilient to enable said arms to receive and frictionally retain a workpiece between said arms.
2. A tack gripper according to
3. A tack gripper according to
4. A tack gripper according to
5. A tack gripper according to
6. A tack gripper according to
7. A tack gripper according to
8. A tack gripper according to
9. A tack gripper according to
10. A tack gripper according to
11. A tack gripper according to
12. A tack gripper according to
13. A tack gripper according to
14. A tack gripper according to
15. A tack gripper according to
16. A tack gripper according to
17. A tack gripper according to
18. A tack gripper according to
19. A tack gripper according to
20. A workpiece which can be tack welded by means of a tack welding gun with a tack gripper according to
21. A workpiece according to
22. A workpiece according to
23. Process for connecting a strip-form workpiece (
0. 25. Process for connecting a strip-form workpiece (
0. 26. A gripper according to
0. 27. A gripper according to
0. 28. A gripper according to
0. 29. A gripper according to
0. 30. A gripper according to
0. 31. A gripper according to
0. 32. A gripper according to
0. 33. A gripper according to
0. 34. A gripper according to
0. 35. A gripper according to
0. 36. A gripper according to
0. 37. A gripper according to
0. 38. A gripper according to
0. 39. A gripper according to
0. 40. A workpiece adapted to be held by a gripper according to
0. 41. A workpiece according to
0. 42. A workpiece according to
0. 43. A gripper according to
0. 44. A gripper according to
0. 45. A gripper according to
0. 46. A gripper according to
|
The invention relates to a tack
24 designates a receiving bore 24 which is formed in the carrier 13 and serves to connect the tack gripper 1 to the welding head of a tack welding gun and to the welding current supply. The carrier 13 has cooling ducts 31 through which a coolant such as water can be conveyed. Connecting lines which connect a coolant supply system to the cooling ducts 31 are not shown. The carrier 13 and/or the arms 2, 3 can be provided with cooling fins in addition to cooling ducts 31 or instead of them. The term cooling fins includes plane fins and rod-shaped fins. If plane fins are formed on the arms 2, 3, they preferably extend transversely to the length of the arms 2, 3 to prevent the resilience of the arms 2, 3 being eliminated by plane fins.
Each arm 2, 3 is resilient in design and, as well as the base 4, can be composed of a suitable low electrical resistance material such as, for example, bronze. The arms 2, 3 are identical in design. Each arm 2, 3 has holes 5, 6, 7 in a region 12 adjacent to its free end. The holes 5, 6, 7 are aligned transversely to the length of the arm 2, 3. The arm 2, 3 has, at its free end, a portion 8 or 9 which is bent over itself. The portion 8 or 9 is arranged between the arms. As shown in
The two arms 2, 3 can be spread against an additional spring force in each case. A spring element 10 or 11, such as a leaf spring, is arranged on the arm 2 or 3. This spring element 10, 11 is a spring subjected to bending stress. The spring element 10, 11 is fixed at one end in a region of the arm 2, 3 by the screw connection 23.
The spring element 10 or 11 has three resilient tongues 25, 26 and 27 which are formed at a distance from one another. Each spring tongue 25, 26 and 27 is curved in the form of an arc to the arm 2 or 3 in its front region.
Each arm 2, 3 has a groove 14, 15 in which a respective projection 16 or 17 formed on the carrier 13 engages. To fix the arm 2 or 3 on the carrier 13, the arm 2 or 3 has orifices 28, 29 through which a screw 23 penetrates. Corresponding apertures (not shown) are formed on the respective spring element 10 or 11.
In a process for connecting the strip-form workpiece 20 to a component, the gripper 1, associated with the welding gun, grips and frictionally secures a portion of a metallic band. A separating device severs a strip of predetermined length from the band to form the workpiece 20. The gripper 1 initially positions the workpiece 20 on the component and then welds the workpiece to the component. The gripper 1 is then removed from the workpiece 20.
It is noted that the gripper 1 can be a tack gripper, and the welding gun can be a tack welding gun, all without departing from the spirit and scope of the invention.
Patent | Priority | Assignee | Title |
Patent | Priority | Assignee | Title |
1748346, | |||
2376957, | |||
3678241, | |||
3729125, | |||
4771160, | Jul 08 1986 | Lothar Schmitt GmbH | Welding tongs |
6025569, | Sep 03 1998 | Senco Products, Inc. | Magazine and a stud advancing system for use with a manual stud welding tool |
JP57115984, | |||
LU58692, |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Oct 18 2000 | Emhart LLC | (assignment on the face of the patent) | / | |||
Oct 30 2002 | Emhart LLC | Newfrey LLC | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 013516 | /0757 |
Date | Maintenance Fee Events |
Jul 01 2002 | M183: Payment of Maintenance Fee, 4th Year, Large Entity. |
Jul 07 2006 | M1552: Payment of Maintenance Fee, 8th Year, Large Entity. |
Aug 09 2010 | M1553: Payment of Maintenance Fee, 12th Year, Large Entity. |
Date | Maintenance Schedule |
Jun 11 2005 | 4 years fee payment window open |
Dec 11 2005 | 6 months grace period start (w surcharge) |
Jun 11 2006 | patent expiry (for year 4) |
Jun 11 2008 | 2 years to revive unintentionally abandoned end. (for year 4) |
Jun 11 2009 | 8 years fee payment window open |
Dec 11 2009 | 6 months grace period start (w surcharge) |
Jun 11 2010 | patent expiry (for year 8) |
Jun 11 2012 | 2 years to revive unintentionally abandoned end. (for year 8) |
Jun 11 2013 | 12 years fee payment window open |
Dec 11 2013 | 6 months grace period start (w surcharge) |
Jun 11 2014 | patent expiry (for year 12) |
Jun 11 2016 | 2 years to revive unintentionally abandoned end. (for year 12) |