JP2586263Y2 - Horizontal automatic welding machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal automatic welding machine.

[0002]

2. Description of the Related Art A horizontal automatic welding machine is known as a welding machine for performing corner welding and flat butt welding of a plate-shaped workpiece. This horizontal automatic welding machine clamps a work placed on a mandrel mold (backing mold) extending in a horizontal y-axis direction from above so that a portion to be welded extends in the y-axis direction. By pressing and fixing the mandrel mold by the clamp mold attached to the arm and positioning and fixing the same, the welding torch provided above the mandrel mold is horizontally moved in the y-axis direction along the welded portion of the work,
Arc welding is automatically performed from above by a welding torch.

[0003]

In a conventional horizontal automatic welding machine, the angular position of a welding torch with respect to a portion to be welded on a workpiece is fixed and cannot be adjusted at all, or is adjusted by manual operation. You just get it.

For this reason, in the conventional horizontal automatic welding machine, even if the work can be easily welded to the portion to be welded along the horizontal y-axis direction, the work can be performed along the horizontal y-axis direction. Following the welding to the welded part
Arc welding cannot be automatically performed on the workpiece along the axial direction.

[0005]

As described above, in order to solve the conventional problems, in the present invention, arc welding is performed on a work to be welded on a y-axis along a horizontal y-axis direction of a work. A horizontal automatic welding machine for performing arc welding on a z-axis welded portion of the work along a vertical z-axis direction, wherein a mandrel mold for supporting the work from behind is provided on a base, and the mandrel is provided. A torch arm is provided above the mold so as to be movable in the horizontal x-axis and y-axis directions and in the vertical z-axis direction.
A torch arm is provided with a torch holder for holding the welding torch so as to be rotatable about a horizontal rotation axis parallel to the x-axis direction; It is characterized in that a rotation motor for rotating around a rotation axis is provided.

[0006]

According to the above construction, the work is supported from the back by the mandrel mold. Next, the torch arm is moved in the horizontal x-axis direction and the vertical z-axis direction by the welding feed drive device, and the welding torch is moved to predetermined positions in the x-axis direction and the z-axis direction corresponding to the y-axis welded portion of the work. Position. In addition, the torch holder is rotated about a horizontal rotation axis parallel to the x-axis by driving the rotation motor, so that the tip of the welding torch faces downward, so that the angular posture of the welding torch with respect to the y-axis welded portion. Adjust Then, while the welding torch is moved to one side in the y-axis direction integrally with the torch arm by driving of the welding feed driving device, arc welding is performed on the y-axis welded portion of the work by the welding torch.

After the arc welding has been completed for the y-axis welded portion of the work, the welding torch is moved to one side in the y-axis direction by driving the welding feed drive device. Next, the welding torch is moved to one side (downward) in the z-axis direction by the welding feed drive device. In addition, the welding torch is rotated about the horizontal rotation axis by driving the rotation motor, and the angular posture of the welding torch with respect to the z-axis welded portion is adjusted. Then, while the welding torch is moved to one side in the z-axis direction by driving the welding feed driving device, the welding torch performs arc welding on the z-axis welded portion of the work.

[0008]

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

FIG. 3 shows an embodiment of a horizontal automatic welding machine as a welding machine according to the present invention. The horizontal automatic welding machine has a base 1, on which a welding power supply device 3 and an NC control device 5 are attached, and a pendant unit 7 is attached to the NC control device 5.

A mandrel mold 11 is fixedly mounted on the base 1 by a mandrel support member 9. The mandrel mold 11 is configured for corner welding and has a ridge line 13 extending horizontally in the horizontal direction, that is, in the Y-axis direction.

At a position above the mandrel mold 11, a torch unit main body 15 is provided so as to be horizontally movable in the Y-axis direction. An L-shaped torch arm 17 is provided on the torch unit main body 15 so as to be horizontally movable in the X-axis direction orthogonal to the Y-axis direction and vertically movable in the Z-axis direction.
A torch holder 19 is attached to the torch arm 17 so as to be rotatable around a horizontal rotation axis parallel to the x-axis, and a welding torch 21 is exchangeably attached to the torch holder 19. The welding torch 21 is configured as, for example, an air-cooled torch for TIG, and the ridge 13 of the mandrel mold 11 is formed.
A welding electrode 23 is provided at the tip end opposite to.

A welding feed driving device 25 is connected to the torch unit main body 15, and the torch unit main body 15 is moved in the Y-axis direction, and the torch arm 17 is moved in the X-axis direction.
The movement in the axial direction is performed by the welding feed driving device 25.

A rotating motor 27 is mounted on the torch arm 17.

The rotating motor 27 is constituted by a stepping motor or the like, and has a rotating shaft (not shown) extending in a direction perpendicular to a plane including the Y axis and the Z axis.
9 to rotate the torch holder 19 quantitatively around the horizontal rotation axis.

Accordingly, the welding torch 21 can be moved in the Y-axis direction by the linear displacement of the torch unit main body 15, can be moved in the X-axis and Z-axis directions by the linear displacement of the torch arm 17, and the torch holder 19 can be moved. The direction and attitude can be changed by being rotatable about the horizontal rotation axis by the rotational displacement of.

A clamp unit 29 is provided above the base 1. The clamp unit 29 is a band-plate-shaped clamp mold that forms a pair symmetrically with respect to the center axis of the mandrel mold 11 as a symmetric line, and extends horizontally along the extending direction of the ridgeline 13 of the mandrel mold 11. 31. The clamp mold 31 is driven in a clamping direction, that is, downward by a driving means such as an air cylinder (not shown), and is unclamped by a return spring (not shown) by releasing the driving force of the driving means. That is, it is driven upward.

As shown in FIGS. 1 and 2, the work W is placed on the mandrel mold so that the y-axis welded portion La of the corner welding portion is located horizontally along the ridgeline 13 of the mandrel mold 11. 11, and is pressed against the mandrel mold 11 by the clamp mold 31 to be positioned and fixed. The workpiece W is positioned at a position axially outward of the mandrel mold 11 in a state where the workpiece W is positioned and fixed as described above.
It has a flange portion F extending along the axis, and in this case, it is necessary to perform welding also along the z-axis welded portion Lb extending perpendicular to the butted portion of the flange portion F.

When welding along the z-axis welded portion Lb of the flange portion F, it is necessary to fix the flange portion F. For this purpose, in the present embodiment, for example, a fixed clamp mold 37 fixedly mounted on the tip end surface of a cylinder member 35 of a hydraulic cylinder device 33 mounted by a mounting structure (not shown) on the base 1, An auxiliary clamp device is provided by a movable clamp mold 41 attached to the tip of the piston rod 39 of the cylinder device 33.

When clamping the flange portion F of the work W pressed and fixed to the mandrel mold 11 by the auxiliary clamping device as described above, for example, the fluid pressure cylinder device 33 is made movable vertically. The fluid pressure cylinder device 33 is moved upward by a driving means (not shown), and the fixed clamp die 37 and the movable clamp die 41 attached thereto are raised from below the flange portion F. When the flange portion F is sandwiched between the fixed clamp mold 37 and the movable clamp mold 41, the piston rod 39 is driven leftward in FIG. The flange portion F is clamped and fixed by the clamp mold 41. As shown in FIG. 1, an adjusting screw 43 for adjusting the distance between the two dies 37 and 41 in accordance with the thickness of the flange portion F is attached to the fixed clamp die 37. .

According to the above-described configuration, welding along the y-axis welded portion La extending horizontally in the Y-axis direction of the work W is performed by a welding torch as indicated by a pseudo-image line in FIG. 21 is moved in the Y-axis direction in the horizontal direction by the welding feed drive device 25 in the downward state, and the welding is performed in the same manner as the general downward welding in the conventional horizontal automatic welding machine.

Next, the welding torch 21 is connected to the y-axis welded portion La.
In other words, the welding torch 21 is further moved in the Y-axis direction by the welding feed driving device 25, when the end of the welding has reached the start end (upper end) of the vertical z-axis welded portion Lb of the flange portion F. It is moved downward in the axial direction and drives a rotation motor 27 for driving the welding torch to rotate, whereby the welding torch 21 together with the torch holder 19 is quantitatively moved around an axis perpendicularly passing through a plane including the Y axis and the Z axis. To change the orientation of the welding torch 21 so that the welding electrode 23 of the welding torch 21 faces sideways with a predetermined inclination angle with respect to the vertical z-axis welded portion Lb of the flange portion F.

Then, by continuously moving the torch arm 17 down, similarly to the horizontal downward welding,
Lateral horizontal welding can be performed in a state where the directional attitude of the welding torch 21 with respect to the welded portion is kept constant, and it is possible to continuously perform these weldings.

Since the flange portion F is clamped by the fixed clamp die 37 and the movable clamp die 41, misalignment of the flange portion F is corrected at the time of welding, and each die 3
Since the welding heat is diffused to 7, 41, an appropriate cooling effect can be obtained, and good welding without heat loss can be performed.
As shown in FIG. 1, an adjusting screw 43 for adjusting the distance between the two dies 37 and 41 in accordance with the thickness of the flange portion F is attached to the fixed clamp die 37. .

The configuration of the present invention is summarized as follows.

That is, arc welding is performed on the y-axis welded portion La along the horizontal y-axis direction of the work W, and the z-axis welded portion Lb along the vertical z-axis direction on the work W is formed on the work W. On the other hand, in a horizontal automatic welding machine for continuously performing arc welding, a mandrel mold 11 for supporting a workpiece W from the back side is provided on a base 1, and the mandrel mold 11 is provided.
The torch arm 17 is movably provided in a horizontal x-axis, y-axis direction and a vertical z-axis direction, and a welding feed drive device 25 for moving the torch arm 17 in the x-axis, y-axis, and z-axis directions. , And the welding torch 21 is attached to the torch arm 17.
Is provided rotatably about a horizontal rotation axis parallel to the x-axis direction, and a rotation motor 27 for rotating the torch holder 19 about the horizontal rotation axis is provided. Features.

Next, the operation of this embodiment is summarized as follows.

That is, the work W is formed by the mandrel mold 11.
Is supported from the back side. Next, the torch arm 17 is moved in the horizontal x-axis direction and the vertical z-axis direction by the welding feed driving device 25, and the welding torch 21 is moved to the x-axis and the z-axis corresponding to the y-axis welded portion La in the work W. Position in the predetermined direction. In addition, the torch holder 19 is rotated about a horizontal rotation axis parallel to the x-axis by driving the rotation motor 27, and the welding to the y-axis welded portion La is performed so that the tip of the welding torch 21 faces downward. The angle posture of the torch 21 is adjusted. The welding torch 21 is moved to one side in the y-axis direction by driving the welding feed driving device 25 to move the torch arm 17 to one side in the y-axis direction. Department La
Arc welding is performed on.

After all the arc welding on the y-axis welded portion La of the work W is completed, the welding torch 21 is moved to one side in the y-axis direction by driving the welding feed driving device 25. Next, the welding torch 21 is moved to one side (downward) in the z-axis direction by driving of the welding feed driving device 25. Further, the welding torch 21 is driven by the rotation motor 27.
Is rotated about the horizontal rotation axis to adjust the angular posture of the welding torch 21 with respect to the z-axis welded portion Lb. Then, the welding torch 2 is driven by the welding feed driving device 25.
1 while moving the welding torch 21 to one side in the z-axis direction.
Thereby, arc welding is performed on the z-axis welded portion Lb of the work W.

As described above, according to the invention of this embodiment,
Since the torch holder 19 provided with the welding torch 21 can be rotated about the horizontal rotation axis parallel to the x-axis by driving the rotation motor 27, the y-axis welded portion La and the z-axis welded portion of the work W are welded. Welding torch 2 for section Lb
1 can be automatically adjusted, and the work W
, The arc welding is performed on the x-axis welded portion La, and the arc welding is continuously and automatically performed on the z-axis welded portion Lb of the workpiece W. This has an effect of improving work efficiency.

[0030]

As described above, according to the first aspect of the present invention, the torch holder provided with the welding torch can be rotated about the horizontal rotation axis parallel to the x-axis by driving the rotation motor. Therefore, the angle posture of the welding torch with respect to the y-axis welded portion and the z-axis welded portion of the work can be automatically adjusted, and arc welding is performed on the y-axis welded portion of the work, and Arc welding can be continuously and automatically performed on the z-axis welded portion, and the effect of improving work efficiency is exhibited.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing a procedure for welding a workpiece by a welding machine according to the present invention.

FIG. 2 is a perspective view of a main part showing a welding state of a workpiece to a flange by a welding machine according to the present invention;

FIG. 3 is a perspective view showing an embodiment of a horizontal automatic welding machine to which the welding machine according to the present invention is applied;

[Explanation of symbols]

 Reference Signs List 1 base 5 mandrel mold 15 torch unit main body 17 torch arm 19 torch holder 21 welding torch 23 welding electrode 27 rotating motor

Claims (1)

(57) [Scope of request for utility model registration] An arc welding is performed on a y-axis welded portion along a horizontal y-axis direction of a work, and an arc welding is performed on a z-axis welded portion along a vertical z-axis direction on the work. A mandrel mold for supporting a workpiece from the back side on a base, and a torch arm is positioned above the mandrel mold with horizontal x-axis, y-axis and vertical z-axis directions. And a torch arm for holding the welding torch on the torch arm in a horizontal rotation axis parallel to the x-axis direction. A horizontal type automatic welding machine characterized by being provided so as to be rotatable around a center and a rotating motor for rotating the torch holder about the horizontal rotating axis.