JP2537716Y2 - Welder with filler wire feeder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding machine with a filler wire supply device such as a non-consumable electrode type welding machine, and more particularly to a welding machine in which the position of a welding torch is variable.

[0002]

2. Description of the Related Art A non-consumable electrode type welding machine such as a TIG welding machine generates an arc between a welding electrode attached to a welding torch and an object to be welded, and supplies a filler wire to this arc region. The welding is performed by melting the filler wire and the work to be welded. In this welding machine, it is necessary to continuously supply the filler wire to the welding electrode of the welding torch with a predetermined positional relationship.

In a welding machine in which the position of the welding torch is variable between a vertical position and a horizontal position, it is necessary to change the filler wire supply position and direction according to the position of the welding torch.
For this reason, the filler wire supply device has conventionally been a movable type in which the arrangement position can be changed around the welding torch using a transmission belt, a gear, or the like.

[0004]

SUMMARY OF THE INVENTION A filler wire feeder of a welding machine in which the position of a welding torch can be changed between a vertical position and a horizontal position, a transmission mechanism such as a transmission belt, gears, etc. Further, there is a disadvantage that the positioning control mechanism and the like are required, and the structure and operation are complicated.

The present invention has been made in view of the above-mentioned problems in the conventional welding machine, and has a simple structure so that the filler wire is always properly applied to the welding operation portion regardless of the change in the position of the welding torch. It is an object of the present invention to provide a welding machine with a filler wire supply device that can supply the filler to a welding machine.

[0006]

According to the present invention, there is provided a swing arm which is rotatable around a central axis inclined at 45 degrees with respect to a horizontal line. A welding torch is attached along an axis inclined by 45 degrees, and the welding torch is configured to change its posture between a vertical posture and a horizontal posture by rotating the swing arm by 180 degrees around the central axis, A filler wire supply device, wherein a filler wire supply guide tube is arranged along the central axis of the swing arm, and the filler wire supply guide tube has a filler wire supply opening end near the tip of the welding torch. Achieved by a welding machine.

[0007]

According to the above construction, even if the welding torch changes its position between the vertical position and the horizontal position, the welding torch is rotated and displaced about the filler wire supply guide tube to change its position. Therefore, the positional relationship between the welding torch and the filler wire supply opening end of the filler wire supply guide tube does not change.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 shows an example of a vertical automatic welding machine suitable for being implemented as a welding machine with a filler wire supply device according to the present invention. The vertical automatic welding machine 1 includes a base 3 and an upper frame 5 erected on the base 3, and has a work table 7 that supports the workpiece W on an upper surface of the base 3. .

A work head 11 having a welding torch 9 is provided on the upper frame 5 so as to be movable in each of X-axis, Y-axis and Z-axis directions.

A base member 13 that can move up and down is provided behind the work table 7 on the base 3, and a pair of barrier-like work abutting members 15 can adjust the mounting angle on the base member 13. It is provided in. A welding gap G extending in the vertical direction is provided between the pair of workpiece abutting members 15, and the workpiece abutting member 1 is provided with the welding gap G.
The welding in the vertical direction is performed by the welding torch 9 from the side opposite to the work abutting side 5 (back side).

An operation box 19 is suspended and supported by an arm 17 on the upper frame 5, and an L-shaped arm 21 located above the work table 7 is provided. A work clamp device 23 is mounted.

The work clamp device 23 is driven vertically by a fluid pressure cylinder device 25, and is pressed in a direction in which the workpiece W is pressed against the workpiece abutting member 15 by a fluid pressure cylinder device (not shown), ie, in the front-rear direction. The movable carriage 27 is driven, and a clamp mold 29 for pressing the workpiece W against the workpiece abutting member 15 is attached to the movable carriage 27.

As shown in FIG. 1, the processing head 11
The ball bearing 33 attached to the bearing bracket 31
, The swing arm 35 is rotatably mounted around a central axis C inclined at 45 degrees with respect to the horizontal with the axis 37, and a welding torch 9 is provided at the tip of the swing arm 35 at an axis inclined at 45 degrees with respect to the central axis C. Installed along.

Accordingly, the welding torch 9 is rotated by 180 degrees around the central axis C of the swing arm 35 on one virtual plane, and the vertical posture shown by the solid line in the drawing and the virtual posture in the drawing. The posture changes between the horizontal posture indicated by the line.

A rotary shaft 41 of a vane type rotary actuator 39 fixed to the bearing bracket 31 is drivingly connected to the shaft 37, and the shaft 37 is driven to rotate by the vane type rotary actuator 39.

The rotary shaft 41 and the shaft 37 of the vane type rotary actuator 39 are both arranged on the same axis along the central axis C, and they are both central holes 41a extending along the central axis C, It is configured as a hollow shaft having 37a.

The center holes 41a, 37 of the rotating shaft 41 and the shaft 37
The filler wire supply guide tube 43 penetrates through a in an electrically insulated state. A filler wire supply guide tube 43 extends along the central axis C, and a filler wire supply opening end 45 at the tip thereof is located near the tip of a welding electrode rod 47 attached to the welding torch 9. ing. The filler wire supply opening end 45 is connected to the two tubes 43a, 4a and 4a to which the filler wire supply guide tube 43 is connected by the adjusting screw 49.
3b, the arrangement position can be adjusted along the central axis C. The filler wire F is continuously supplied to the filler wire supply opening end 45 by a wire supply device (not shown) to the filler wire supply guide tube 43.

According to the above configuration, the welding torch 9
The vertical posture shown by the solid line in the figure and the virtual posture shown in the figure are obtained by rotating the swing arm 35 around the central axis C by 180 degrees by the vane type rotary actuator 39. Is changed between the horizontal postures indicated by (1) and (2), the welding line is selectively downwardly welded horizontally and the welding line is vertically horizontally welded selectively.

The change of the position of the welding torch 9 between the vertical position and the horizontal position is performed by a rotational displacement about the center axis C, that is, the guide tube 43 for supplying the filler wire. Welding torch 9 by
And the positional relationship between the filler tube and the filler wire supply opening end 45 of the filler wire supply guide tube 43 does not fluctuate.
The feed direction of the filler wire F from the filler wire supply opening end 45 to the welding torch 9 does not change regardless of the vertical posture or the horizontal posture.

In any of the horizontal welding and the downward welding, it is preferable that the filler wire F is supplied to the front of the welding torch 9 in the advancing direction. The welding proceeds from the left to the right, and if the welding line is vertical sideways welding, the welding may be performed upward from below.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art.

[0023]

As will be understood from the above description, according to the welding machine with the filler wire supply device according to the present invention, even if the welding torch changes its position between the vertical position and the horizontal position.
Since the welding torch rotates and displaces around the filler wire supply guide tube to change its position, the change in the position of the welding torch changes the positional relationship between the welding torch and the filler wire supply opening end of the filler wire supply guide tube. The filler wire supply position is fixed, and the filler wire supply is always properly supplied to the welding working part regardless of the change in the position of the welding torch, and the transmission for changing the arrangement of the filler wire supply part is performed. Since no transmission mechanism such as belts and gears, no drive motor, and no positioning control mechanism are required, the structure of the filler wire supply unit does not become complicated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an essential part of an embodiment of a welding machine with a filler wire supply device according to the present invention.

FIG. 2 is a perspective view showing an example of a vertical automatic welding machine suitable for being implemented as a welding machine with a filler wire supply device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical automatic welding machine 3 Base 5 Upper frame 7 Work table 9 Welding torch 11 Working head 15 Work abutment member 23 Work clamp device 35 Swing arm 37 Axis 39 Vane type rotary actuator 43 Filler wire supply guide tube 45 Filler wire supply Open end F Filler wire

Claims (1)

(57) [Scope of request for utility model registration] A swing arm rotatable around a central axis inclined at 45 degrees to a horizontal line, wherein a welding torch is attached to the swing arm along an axis inclined at 45 degrees to the central axis; The welding torch is configured to change the posture between a vertical posture and a horizontal posture by rotating the swing arm by 180 degrees around the center axis,
A filler wire supply guide tube is disposed along the center axis of the swing arm, and the filler wire supply guide tube has a filler wire supply opening end near the tip of the welding torch. Welding machine with device.