JPS5841023Y2 - Torch holding device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a torch holding device that is attached to an automatic welding device that automatically performs welding by controlling the relative positions of the torch and the workpiece using, for example, three spatial axes.

Conventionally, various torch holding devices have been proposed in which a protruding body is attached to the rotating shaft of the automatic welding device, and an elevating means is attached to the protruding body to enable the torch to be raised and raised around the position of the welding point of the torch. .

This invention aims to provide a novel torch holding device, and examples thereof will be described in detail below.

1: A part of the main body of the automatic welding device, and a bearing portion of the rotating shaft 2.

3... It is a protruding body attached to the lower part of the rotating shaft 2.

4.5...These are links of different lengths whose proximal ends are joined 6 and 7 to the protruding body 3, respectively.

In the example, 4 is long and 5 is short.

8...Rotation angle transmission means (transmission means using gears in the embodiment) for rotating both links 4 and 5 in parallel to each other.

That is, a first gear 8a integral with the shaft 4, a second gear 8b provided on the shaft 5 and having the same diameter and the same number of teeth as the gear 8a, and a shaft attached to the protruding body 3 so as to mesh between both gears 8a and 8b. It consists of a third gear 8d supported by a support 8c.

9.10... Attached to the tips of both links 4 and 5 11°1
This is a guide with two parts.

13°°・It is a rod that is slidably supported on both guides 9 and 10.

14...A torch mounting bracket attached to the tip of the rod 13.

15...An arc-shaped elongated hole 15a is formed integrally with the protrusion 3 and centered at a point P where a straight line A passing through the shafts 6 and 7 intersects a straight line B passing through both guides 9 and 10. It's a cam.

A pin 14a protruding from the metal fitting 14 is inserted into the elongated hole 15a, and the cam 15 can eventually guide the metal fitting 14.

M: A power device attached to the protruding body 3, which can rotate the link 4 and the gear 8a via a known power transmission means 16.

The configurations 4 to 16 and M described above constitute a torch elevating means.

T: A torch attached to the metal fitting 14.

The metal fitting 14 is arranged so that the welding point of the torch T attached to the metal fitting 14 coincides with the point P.

Further, the point P is located on the center line C of the rotating shaft 2.

When fillet welding a workpiece (not shown),
Automatic welding can be carried out by setting the torch T at an elevation angle as shown by the solid line in FIG.

When butt welding is to be performed, the power unit M is driven to rotate the link 4 counterclockwise in FIG. 1.

Then, the link 5 is also rotated counterclockwise by the same angle as the link 4 by the transmission means 8, and eventually both links 4 and 5 are rotated counterclockwise while remaining in a parallel state.

During this rotation, pin 1 of the metal fitting 14 attached to the rod 13
4a is guided by the cam 15, so the guide 9.10
rotates counterclockwise while sliding on the rod 13.

Therefore, the rod 13 rotates counterclockwise around point P, and the torch T also rotates counterclockwise around point P, so that the torch T has an elevation angle as indicated by the two-dot chain line in FIG. become.

Then, the angle around the center line C relative to the traveling direction of the torch T may be controlled by the control device to perform automatic welding.

The direction in which the torch T travels is the direction indicated by the solid line in Figure 1.
In this case, the torch T may be moved in a direction perpendicular to the plane of the paper, and in the case of the torch T indicated by the two-dot chain line in FIG. 1, the torch 1' may be moved to the left.

The above description is an example, and for example, the transmission means 8 may use a combination of a chase and a sprocket, or another nonch parallel to the straight line A may be connected between the links 4 and 5 to form a parallelogram. A link may be configured, and the cam 15 further includes:
The technical scope of this invention also includes replacing the metal fitting 14 with an equivalent equivalent, such as a configuration that guides the mouth throat 13.

As can be understood from the above description, this invention uses the above-mentioned configurations 4 to 13 to raise and lower the torch T around the point P.
The constraint condition that the straight line B always intersects the straight line A at the point P, the cam 15, the rod 13 or the metal fitting 14
(a) Conventional , the structure is simpler and easier to handle than a torch holding device that satisfies both of the above-mentioned constraints at the same time using only parallelogram links.

(b) Also, compared to the conventional torch holding device which combines an arc-shaped rank and a pinion and allows the rack to rotate around point P, satisfying both of the above-mentioned constraint conditions at the same time,
When the torch T is lifted up and down, the rack protrudes greatly from the elevation area of the torch T, but the elevation means of this invention fits within the elevation area, and the elevation means gets in the way of the object to be welded. Nor.

[Brief explanation of the drawing]

The figures are all examples of this invention; Fig. 1 is an overall view, Fig. 2 is a sectional view taken along the ■-■ arrow in Fig. 1, and Fig. 3 is a view taken along the I-1 arrow in Fig. 1. be. In the figure, 2...Rotating shaft, 3...Protrusion, 4°5...Links, 6, 7...
...Respectively, articulation shaft, 8...Rotation angle transmission means, 9, 10...Respectively guide, 11, 12
...Respectively, joint shaft, 13...Rod, 14...Torch mounting bracket, 14a...
・Pin, 15...Cam, T...Torch, L...Torch T elevation means, A, B...
...are respectively a straight line and P...a point.

Claims (1)

[Scope of utility model registration request] A torch holding device including a protruding body attached to a rotating shaft, and an elevating means attached to the protruding body and capable of raising and lowering the torch around a welding point position of the torch, wherein the protruding body has a proximal end thereof. two links of different lengths connected to each other, a rotation angle transmitting means for rotating these links in parallel to each other, a guide connected to the tips of both links, and a slider that slides on these guides. A movably supported rod, a torch mounting bracket attached to the tip of this rod,
The rod or torch is provided integrally with the protruding body, is formed in an arc shape centered on a point where a straight line passing through the articulation axis of the base end of both the links and a straight line passing through the both guides intersects, and is attached to the rod or torch. The torch holding device includes a cam configured to guide the metal fitting through the pin.