Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1996-10-09
1998-07-21
Martin, David S.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
901 42, 414731, 219660, 2191241, B25J 918
Patent
active
057839212
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a robot by which, because of an integral arc welding power source housed in a robot stand, it is possible to simplify a robot installation operation, minimize space needed for installation thereof, shorten an output cable of the welding power source and obtain a stable welding performance.
In the past, generally, a welding robot comprised three elements, i.e., a robot body (a manipulator), a robot control unit (a control panel) and a welding power source (including a wire feed mechanism), wherein the welding robot and the welding power source are installed in separate locations, and the robot and the welding power source are connected by a welding output cable. However, there is a problem in that since the installation location for the robot and the installation location for the welding power source are independent, a large installation space needs to be secured.
Instead of such a robot, there is disclosed a method for housing an arc welding power source in a robot control panel. Japanese Unexamined Patent Publication No. Hei 4-365581 is one such known method. However, since a long welding output cable connecting the robot to the welding power source is necessary, inductance of the cable is so high that detection of short-circuiting timing delays and the short-circuiting time is thus overly long, making the arc unstable. Further, the rising time of the current is extended, preventing smooth shifting to the arc, and resulting in an unstable arc.
Japanese Unexamined Patent Publication No. Sho 60-158987 is known to show an improvement in a robot as described above, and discloses a spot welding robot in which a welding power source (a transformer and a commutator) is provided at an extreme end of a robot arm. The arrangement of the welding power source at the extreme end of the arm is not preferable because a manipulator having a special construction to withstand the load thereof is necessary, and because the arm portion is excessively large.
It is therefore an object of the present invention to provide a robot which minimizes space needed for the installation thereof and requires a shorter time for installation and fewer parts, whereby it becomes possible to reduce the manufacturing cost, simplify the robot installation operation and obtain a stable welding performance.
SUMMARY OF THE INVENTION
The present invention is characterized in that a robot stand having a robot body having an articulated manipulator placed thereon is interiorly provided with electric circuits for driving and controlling operation of tools held by the robot body.
With this arrangement, it is possible to minimize the space needed for installation of an arc welding robot, simplify the installation operation and obtain a stable welding performance.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 a front view showing a preferred embodiment of an arc welding robot according to the present invention with a front lid removed; FIG. 2 is a front view showing the preferred embodiment of the arc welding robot according to the present invention with the front lid mounted; FIG. 3 is a left side view showing the preferred embodiment of the arc welding robot according to the present invention; and FIG. 4 is a back view showing the preferred embodiment of the arc welding robot according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to the drawings. FIG. 1 is a front view showing an arc welding robot according to the present invention with the front lid thereof removed, and FIG. 2 is a front view of the robot with the front lid mounted. FIG. 3 is a left side view of the robot, and FIG. 4 is a back view of the robot. In FIGS. 1 to 4, reference numeral 1 designates an arc welding robot; la a welding torch or welding gun; 2, an arc welding robot stand; 3, a window for an output cable of an arc welding power source; 4, a servo power unit for a motor of the robot; 5, an arc welding power source; 6, a power source plug for
REFERENCES:
patent: 4086522 (1978-04-01), Engelberger et al.
patent: 4538047 (1985-08-01), Nakano et al.
patent: 4655675 (1987-04-01), Yasuoka
patent: 4677276 (1987-06-01), Nio et al.
patent: 5403988 (1995-04-01), Kawada et al.
patent: 5548096 (1996-08-01), Akasaka et al.
patent: 5658121 (1997-08-01), Hashimoto
Handa Hiroyuki
Misumi Yukio
Okumura Shinji
Tanaka Michiharu
Kabushiki Kaisha Yaskawa Denki
Martin David S.
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