JPS5853179Y2 - Welding torch rotation movement mechanism of automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a welding torch rotation and movement mechanism of an automatic welding device.

In this type of welding apparatus, when the joint of the workpiece has a curved surface, it is necessary to rotate the welding torch at a constant distance from the joint.

The purpose of this invention is to smoothly rotate the welding torch with a simple configuration and improve welding accuracy.

The embodiments shown in the drawings will be described below.

In FIGS. 1 and 2, reference numeral 1 denotes a fixing plate attached to the main body of the apparatus (not shown), and an axis a is attached to the fixing plate 1.

The first and second link arms 21 and 22 are rotatably supported by
A bracket 4 which is rotatably supported by axes c and d in a second position and rotatably supported by axes e and f to the second link arm 22 in a second position and supports a welding torch 3 in a third position. It has first and second links 51 and 52 rotatably supported by g and h.

Support shafts a and b of the first and second link arms 21 and 22
The axis of the welding torch 3 and the virtual welding torch center point j located near the tip of the welding torch 3 are located on one straight line.

In addition, the support shafts c and e of the first and second links 51 and 52 on the left and right
, g, d, f, and h are located on two straight lines parallel to the straight line containing the support shaft axes of the first and second link arms 21 and 22.

Furthermore, the first support shafts c and d of the left and right first and second links 51 and 52, the support shaft a of the first link arm 21, the second support shafts e and f of the left and right first and second links, and the second support shafts e and f of the left and right first and second links. The support shaft of the two-link arm 22, and the left and right first and second links 51.5
The line portions connecting the third support axes g and h of No. 2 and the virtual welding torch center point j form three congruent triangles.

The support shaft a of the first link arm 21 is rotatably supported with respect to the fixed plate 1, and the spline shaft at one end is connected to the first link arm 21, and the spline shaft at the other end is connected to a drive source (not shown). connected.

In the above configuration, when the support shaft a is rotated, for example, in the clockwise direction shown in the first figure, the second link arm and the first and second links 51 and 52 are rotated via the first link arm 21 as shown by the chain line in the second figure. The support shaft and the virtual welding torch rotate around the center point j as shown in FIG.

Therefore, the welding torch 3 rotates while maintaining a constant distance between its tip and the virtual welding torch center point j, that is, the workpiece joint.

According to the present invention, the welding torch can be rotated with high precision using a link mechanism having a simple structure as described above.

Furthermore, there is no need to consider the link mechanism, and since the mechanism is simple, it has the advantage of being excellent in rigidity.

In the above embodiment, the welding torch bracket 4 is supported by the lower support shaft gth, but the upper support shaft c,
d, e, and f, and the positions of the support shafts a and b may be changed accordingly, or the driving force may be taken from the support shaft of the second link arm 22.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view thereof, and FIG. 3 is an explanatory diagram of rotational movement of a link mechanism. 1 is a fixed plate, 21 is a first link arm, 22 is a second link arm, 3 is a welding torch, 51 is a first link, and 52 is a second link.

Claims (1)

[Scope of utility model registration request] a first fixedly supported on the fixed plate 1 by axes a and b;
The second link arms 21, 22 are located on both left and right sides of the link arms 21, 22, and the first position is the first link arm 21, 22.
It is fixedly supported on the link arm 21 by an axis C2d, and the second position is fixedly supported by the axis e, f on the second link arm 22.
The bracket 4 supporting the welding torch 3 in a third position is rotatably supported by the axis gy) 1, and has first and second links 51 and 52 rotatably supported by the welding torch 3 in a third position. The axes of the support shafts a and b of the two-link arm 2L22 and the virtual welding torch center point j located near the tip of the welding torch 3 are located on one straight line, and the left and right first and second
Each support axis c, e, g and d, f of links 51, 52,
Each axis of h is located on two straight lines parallel to the straight line containing the support shaft axes of the first and second link arms 21 and 22,
The first support shaft c of the above-mentioned left and right first and second links 51.52
, d and the 11th left and right support shaft a1 of the first link arm 21
Second support shafts e and f of the second link and the second link arm 22
support shaft b1 and left and right first and second links 51.52
The line portions connecting the third support axes g, h and the virtual welding torch center point j form three congruent triangles.
Support shaft a or b on one side of link arm 21.22
A welding torch rotation movement mechanism of automatic welding equipment connected to a drive source.