JPS61273255A - Brazing device - Google Patents

Abstract

PURPOSE:To obviate the influence of a pilot flame to a visual camera by constituting a driving mechanism in such a manner that said mechanism advances and retreats a burner nozzle and rotates the burner nozzle with the advancing and retreating directions as the axial line thereby spacing and retreating the pilot flame from the visual field of the visual camera. CONSTITUTION:A burner body 38 is rotated 90 deg. around the axial line in the advancing and retreating directions and the burner nozzle 42 is brought to a vertical to a horizontal position when a burner main pipe 41 is rotated toward a brazing position 9 by the burner driving mechanism 39. The pilot flame is changed over to a heating flame an the nozzle 32 of a brazing filler metal positioning body 33 to deliver the brazing filler metal 31. The nozzles 32, 42 are retreated to return the flame to the pilot flame after the prescribed time. The nozzle 42 restores the horizontal position upon retreating of the pipe 41. The pilot flame is held spaced from an optical axis 26 so as not to enter the visual field of the visual camera 27 in the fresh positioning stage. The ill effect of the pilot flame to the visual camera is thus eliminated without spoiling the productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The present invention relates to improvements in brazing equipment equipped with a visual camera.

[Technical background of the invention and its problems]

With the recent introduction of robots, brazing equipment equipped with visual cameras is being considered. The inventors of the present application filed an application for such a device as Japanese Patent Application No. 1983-248604. To briefly describe this with reference to FIGS. 6 and 7, a burner nozzle (2) is mounted on a support (1), a burner drive mechanism (8) for advancing and retracting the burner nozzle, a visual camera (4), and a brazing material. (5)
A brazing head (7) is integrally attached with a brazing filler metal nozzle (6) for guiding the brazing head (7), and this is movably supported by a robot. Then, the position is detected using a visual camera (4) and the robot is controlled to place the brazing member (8).
The burner nozzle (2) is positioned with respect to the brazing part (9), and then the burner nozzle (2) is advanced by the burner drive mechanism (8) Ic to face the brazing part (9) and heated. Brazing is performed by supplying brazing material from the nozzle (6), and after a predetermined period of time, the frame is turned off.
Retract it to finish the brazing work.

Generally, the work is carried out as described above, but the method of extinguishing the flame each time and igniting it before starting work has the disadvantage of hindering speed-up. Another method is to make the flame smaller and leave it as a pilot flame instead of igniting it every time. However, the pilot flame method has the disadvantage that the pilot flame affects the field of view of the visual camera, making position detection impossible. In order to avoid this, it is possible to move the burner nozzle left and right or up and down while retracting the burner nozzle, thereby evacuating the pilot flame from the field of view of the visual camera, but this has the disadvantage of complicating the device and prolonging the operation time. Ta.

[Purpose of the invention]

The present invention has been made in order to eliminate the above-mentioned disadvantages, and an object of the present invention is to provide a brazing device that has a simple configuration and eliminates the negative influence of a pilot flame on a visual camera without reducing production efficiency. do.

[Summary of the invention]

The present invention includes a visual camera for position detection, a burner nozzle,
In a brazing device that has a burner drive mechanism that drives the burner nozzle to a predetermined position, the burner drive mechanism advances and retreats the burner nozzle and rotates the burner nozzle around the direction of advance and retreat as an axis to move the pilot flame away from the field of view of a visual camera. It is.

[Embodiments of the invention]

The details of the present invention will be explained below using first and second embodiments with reference to FIGS. 1 to 5.

The brazing apparatus of the first embodiment shown in FIGS. 1 to 3 is constructed by attaching a brazing head (c) to a generally known computer-controlled robot (not shown). The brazing member (8) has a small-diameter pipe (8b) inserted into a large-diameter pipe (8a) and held therein, and its stepped portion serves as a brazing portion (9). @ is the support, on the lower mounting plate)
and an upper mounting plate spaced upwardly and sloped downwardly. The lower surface of the lower mounting plate (to) is fixed to the robot.

A visual camera having an optical axis is attached to the front part of the upper surface of the lower mounting plate. A brazing filler metal nozzle (2) for guiding the brazing filler metal (b) and a brazing filler metal positioning body (hooking) consisting of an air cylinder body for advancing and retracting the brazing filler metal nozzle (2) are provided on the upper mounting plate (top). Further, a burner body (to) and a burner drive mechanism (to) are mounted on the upper mounting plate (c) in close proximity to the brazing material positioning body (to). The burner body (to) consists of a burner main pipe (4υ) and a pair of burner nozzles (4υ) that are airtightly held at one end and formed in an arc shape opposite to each other at the other end. The burner drive mechanism (X) consists of a pair of brackets (C) fixed to the upper mounting plate (C) at a distance from each other.

(c), the air cylinder body (column, platen Xa) fixed to this, (a pair of guide rods 147 that slidably penetrated through a) t (4η, and these guide rods (47r, (4
A connector that connects the piston rod (c) with the piston rod (c) and rotatably holds the burner main pipe through a bearing, and a collar that is fixed to the burner body (41) with the connector (c) in between. 6υ.

61), a rotating cam body 6, etc. To explain this rotating cam body, it is a means for evacuation of the burner nozzle (6), and the cam block (H) fixed to the brackets (C) and (C) is slidable in the burner main pipe (41). In addition, a spiral twisted cam groove 64 is formed along the sliding inner surface, and a cam pin fixed to the burner main pipe (40) is slidably fitted into this groove 64). As the burner main pipe I moves back and forth, the burner main pipe (41) rotates about 90 degrees.

Next, the operation of this embodiment will be explained, focusing on the operation of the burner drive mechanism (g). In the illustrated state, the visual camera captures the brazing part (9), and the position signal of the image r is processed to position the burner nozzle (4z (or the visual camera). Next, the air The cylinder body (4Q) is activated and the burner main pipe (41) advances toward the brazing site (9) via the connecting rod.

At this time, as the cam bin 69 moves along the twisted cam groove 54), the burner main pipe (49) rotates 90 degrees around the axis along the driving direction, and the burner nozzle (421
, (43 changes from a horizontal state to a vertical state as shown by the two-dot chain line in FIG. 2, and assumes a position for heating the brazing part (9). At the same time, the flame is switched from the pilot state to the heating flame state. Next, as the air cylinder in the brazing material positioning position moves forward, the brazing material nozzle (a) moves forward and faces the brazing area (9).Next, a brazing material supplying device (not shown) supplies a predetermined amount of brazing material GD to the brazing material. It is sent out from the nozzle (A). After a predetermined period of time in this state, the brazing material nozzle retreats, and finally the burner nozzle (43) retreats.

At this time, the burner main pipe (4υ) rotates in the opposite direction to the case of forward movement at the same time as retreating, and becomes the state shown in the figure, which also serves as a pilot flame.For the next brazing, the newly transferred brazing parts are detected by the visual camera @. Positioning is performed for (8).

At this time, the pilot flame is separated from the optical axis) and does not adversely affect the field of view.

A second embodiment is shown in FIGS. 4 and 5.

This is constructed by bending the tip of a burner nozzle, and the tip faces upward in the retracted position and rotates 90 degrees in the forward position to heat the brazing part (9) from the side. , the heating efficiency is good, and the pilot flame is sufficiently evacuated. The rotation mechanism of the burner nozzle 63 and other details are the same as those in the first embodiment, so explanations thereof will be omitted.

The number of burner nozzles is not limited to 20, and the burner rotation mechanism is not limited to a cam groove and a cam pin, but may be any other mechanism such as a gear mechanism or a link mechanism.

〔Effect of the invention〕

As detailed above, in the brazing device of the present invention, the burner is retracted from the field of view of the visual camera, so the pilot flame can be left behind, and the retraction is extremely quick and reliable as it only requires a rotational movement. It has the effect of improving productivity.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main part of the first embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is a sectional view of the main part taken along the line ■-■ in FIG. 1, and FIG. A front view showing only the essential parts of the second embodiment of the present invention, FIG. 5 is also a plan view, FIG. 6 is a plan view of a brazing device applied before the present application, and FIG. 7 is a front view as well. . (9): Brazing part @: Visual camera (to) Nihana drive mechanism (Q: Burner nozzle l53 = evacuation means agent Patent attorney Noriyuki Chika (and 1 other person) Fig. 2 Fig. 3 Fig. 1N4 Fig. 5

Claims (1)

[Claims] It has a visual camera, a burner nozzle, and a burner drive mechanism that moves the burner nozzle forward and backward, the burner nozzle is positioned by the visual camera, and the burner drive mechanism advances the burner nozzle to a predetermined position to heat the brazing site. The brazing device is characterized in that the burner drive mechanism is equipped with a shunting means that rotates the burner nozzle about its advancing and retreating direction as an axis and moves the combustion gas of the burner nozzle away from the field of view of the visual camera. .