Electric heating – Metal heating – By arc
Patent
1991-08-15
1993-12-28
Shaw, Clifford C.
Electric heating
Metal heating
By arc
21912434, 901 15, 901 42, B23K 912
Patent
active
052742130
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to an electric welding robot comprising a plurality of arms articulated with one another and to a method for welding by using the welding robot.
2. Background Art
In the prior art known is a welding robot, which has a plurality of rotating arms articulated with one another to move its welding electrode horizontally and vertically.
For the welding robot of the prior art, positioning of the electrode at desired locations is controlled by rotating or moving the said arms independently by respective motors.
However, it is difficult to control the said arms at the same time for welding in a particular direction, and therefore it requires special controlling means and costs much.
DISCLOSURE OF INVENTION
It is therefore the primary object of the present invention to provide an electric welding robot which carries out welding easily in any direction.
It is also an object of the present invention to provide a method for carrying out welding easily in any direction.
The electric welding robot of the present invention comprises a projecting arm mounted on a support to move vertically and horizontally; a first rotating arm articulated with the projecting arm; a second rotating arm articulated with the first rotating arm; a head having a welding electrode, being connected to its supporting elements one of which is fixed to the second rotating arm; first means for rotating the first rotating arm about a first vertical axis with reference to the projecting arm, and second means for rotating the second rotating arm about a second vertical axis with reference to the first rotating arm, the said supporting elements positioning the top end of the welding electrode on the said second vertical axis.
Particularly, the second means for rotating the second rotating arm includes a motor fixed not to rotate about the first vertical axis and transmission means both of which cause a mechanically and automatically synchronous rotation of the second rotating arm about the second vertical axis through an equal angle in the opposite direction when the first rotating arm is rotated forcibly by the said first means about the first vertical axis through an angle in a direction.
The method of the present invention for welding by using this welding robot comprises steps of rotating the second rotating arm with reference to the first rotating arm through a desired angle when necessary so that the second arm faces in a desired direction, and rotating of the first arm about the first vertical axis through an angle in a direction with a mechanically and automatically synchronous rotation of the second arm about the second vertical axis through an equal angle in the opposite direction effected by the said rotation of the first arm.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a side view of an electric welding robot according to the present invention.
FIG. 2 is a top plan view of the electric welding robot shown in FIG. 1.
FIG. 3 is a partially sectional side view showing means for rotating two rotating arms of the welding robot.
FIGS. 4(a)-4(e) are explanatory drawings to show movements of three arms of the welding robot.
BEST MODE FOR CARRYING OUT THE INVENTION
The invention will now be described in detail with reference to the attached drawings.
In FIGS. 1 and 2, there is shown a welding robot 1 according to the present invention. The welding robot 1 includes an electronic control unit 40 and a support 2. The support 2 carries at its top a rectilinear guide beam 3 disposed parallel to the X axis. A slide 4 is mounted slidably on the guide beam 3. The slide 4 is driven by a driving unit 5 of known type. The slide 4 fixedly carries a pair of vertical guides 6 parallel to the Z axis, along which slides a second slide 7 by means of another driving unit 8 also of known type.
In FIGS. 1-3, the slide 7 is provided with a projecting arm 9. A first rotating arm 19 is pivoted at its one end by means of a shaft 68 with an end of the projecting arm 9. The first rotating arm 19 is rotated abo
REFERENCES:
patent: 3031566 (1962-04-01), Wuesthoff
patent: 4014495 (1977-03-01), Oda et al.
patent: 4179602 (1979-12-01), Maruyama et al.
patent: 4323758 (1982-04-01), Vokurka
patent: 4594670 (1986-06-01), Itoh
patent: 4629860 (1986-12-01), Lindbom
patent: 4642752 (1987-02-01), Debarbieri et al.
patent: 4675502 (1987-06-01), Haefner et al.
patent: 5015821 (1991-05-01), Sartorio et al.
Amada Company Limited
Shaw Clifford C.
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