JP2519570Y2 - Portable single-sided welding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a portable single-sided welding device for arc welding a relatively short welded portion.

<Prior Art> Recently, even in arc welding work, automatic welding devices are widely used due to the reduction of skilled workers and labor saving.

Conventionally, this type of automatic welding apparatus, as shown in FIG. 6 and FIG. 7, travels by a guide rail 4'disposed on the workpiece W and a drive machine along the guide rail 4 '. A traveling carriage 5'and an arc welding torch 12 'supported by the traveling carriage 5'via an appropriate adjusting mechanism 7',
The wire feeding device 11 'is configured to rewind the welding wire from the wire spool 9'mounted on the traveling carriage 5'and feed it through the welding torch 12'.

When the above-mentioned general-purpose automatic welding device is used, the guide rail 4'is arranged parallel to the welding line, and the automatic welding device is transported to the next welding position after the completion of welding.

<Problems to be solved by the invention> However, as the wire spool 9 ', a wound wire of 25 kg is usually used, and the wire feeding device 11' is used.
Has a weight of about 20 kg, the driving machine for traveling, the traveling carriage 5 ', the guide rail 4', and the adjusting mechanism 7'become large, which not only makes the automatic welding apparatus expensive but also reduces the weight of the apparatus. There is a problem that the work of transporting the device and the work of positioning the guide rail 4'become troublesome due to the large size.

Particularly, in a relatively short arc welding operation, since the positioning, welding and transportation of the apparatus are repeated, a portable single-sided welding apparatus with low cost and good workability has been desired.

<Means for Solving the Problems> In the structure of the present invention, in a portable single-sided welding device, a substantially L-shaped portable frame that rises upward on the side opposite to the welding line is provided at intervals in the welding line direction. And, the upper part of the frame is connected by a gripping part in the welding line direction, and a pair of positioning blocks provided at intervals in the welding line direction are provided on the portable frame so as to project in a direction orthogonal to the welding line. Spool-on-gun welding in which a guide rail that is parallel to the welding line is installed, a traveling carriage that runs on the guide rail is driven, and a small-diameter wire spool, wire feeding device, and welding head are integrally formed. The torch is mounted on a traveling carriage via an adjusting mechanism, and an operation box having a speed adjustment dial of the traveling carriage and a welding switch is arranged on an upper portion of a portable frame.

<Example> Hereinafter, the present invention will be described in detail with reference to an illustrated example.

In FIGS. 1 to 5, reference numeral 1 is a substantially L-shaped portable frame which rises upward on the side opposite to the welding line, and the substantially L-shaped portion 101 is arranged in the welding line direction at an interval L ₁ for example. The substantially L-shaped portions 101, 101 are arranged and the upper portions of the substantially L-shaped portions 101, 101 are connected in the welding line direction to form a gripping portion 102 for transportation.
The portable frame 1 is composed of 1, 101 and the grip portion 102. In addition, the substantially L-shaped portion 101 has ribs 103, 103 for reinforcement.
Further, abutting members 104, 104 that come into contact with the workpiece W are appropriately arranged. Reference numerals 2 and 3 denote a pair of positioning blocks provided on the portable frame 1 at intervals in the welding line direction, that is, the Y direction, and protruding in a direction orthogonal to the welding line, that is, the X direction. , 3 are positionally displaceable in the X direction with respect to the portable frame 1 and are arranged so as to be fixed at desired positions. Reference numeral 4 denotes a guide rail which is arranged on the portable frame 1 in parallel with the welding line, and 5 denotes a traveling carriage which travels along the guide rail 4 by a driving machine 6. From the traveling carriage 5, the driving machine 6 and the guide rail 4, The traveling device can be appropriately configured by a known technique such as a sliding type or a rolling type.

Reference numeral 7 denotes an adjusting mechanism for adjusting the position of the welding torch 8 which will be described later. For example, as shown in FIGS. 1 and 4, the guide member 71 in the X direction and the guide member 71 guide the adjustment. The adjustment member 73 is freely adjusted in the X direction by the turning operation of the screw 72, and is axially supported by a Y direction hole formed in the upper portion of the adjustment member 73, and the axis of the hole is centered at 0 ₁ . The adjustment mechanism 7 includes a bracket 74 that can be freely rotated and a clamp member 75 that fixes the bracket 74 to a free position.
Is configured.

Reference numeral 8 denotes a spool-on-gun welding torch, as shown in FIG. 5, which is a small wire feeding device 11 provided with a small diameter wire spool 9 and a small driving machine 112 connected to a feeding roll 111. And a welding head 12 are integrally formed to form a spool-on-gun welding torch 8. Reference numeral 13 denotes an operation box arranged on the upper part of the portable frame 1. For example, the operation box 13 is provided with a speed adjustment dial 131 and a welding switch 132 of the traveling carriage. Of course, in addition to the above, appropriate switches such as a welding wire inching switch 133 and an emergency stop switch 134 can be provided.

14 and 15 are dogs and detectors for position detection, and the dogs 14 and detectors 15 are preferably provided for the welding start position and the welding end position.

A portable single-sided welding device is constituted by the above 1 to 15.

In the above portable single-sided welding device, the positioning block
The positions of the positioning blocks 2 and 3 are set in the X direction so that the line connecting the end surfaces of 2 and 3 is parallel to the guide rail 4, and in this state, the operator holds the gripping portion 102 of the portable frame 1.
The welding device is transported to the welding work position while gripping the. After that, the positioning of the main body of the welding apparatus, that is, the portable frame 1 and the guide rails 4 is completed only by aligning the end faces of the positioning blocks 2 and 3 with the welding line. In this case, if the tip of the welding torch 8 is displaced in the X direction, the position is corrected by rotating the adjusting screw 72. The adjustment of the target angle of the welding torch 8 is performed by operating the clamp member 75 and rotating the bracket 74 with respect to the axis: 0 ₁ . Of course, after adjusting the angle of the welding torch 8, the welding torch 8
If the position of the tip of the is shifted in the X direction, the adjusting screw 72 is operated to correct the position.

Thereafter, by operating the welding switch 132 of the operation box 13, one-sided welding is automatically performed, and the welding is automatically terminated by the output signal of the welding termination detector 15. After the welding is completed, the worker holds the grip portion 10 of the portable frame 1.
Grasp 2 and transport the welding device to the next welding work position, and repeat the next welding work.

By the way, when relatively short welding with the same welding start position and welding end position is sequentially performed at different locations,
If an electric sequence is formed so that the traveling carriage 5 travels to the welding start side by the welding end output signal and automatically stops at the welding start position, the next positioning operation of the welding device can be performed quickly. You can Of course, even if the starting and ending positions of welding are different, the position of the end of the traveling carriage 5 with respect to the guide rail 4 in the Y ₂ direction is determined as the original position, and the traveling carriage 5 is always kept at the original position after welding. By returning to the position, the next positioning operation of the welding device can be quickly performed, and the welding after the positioning can be immediately performed. Further, instead of the welding end detector 15, the welding can be ended at an arbitrary position by operating a switch.

Further, in the above, as the adjusting mechanism 7 of the welding torch, an adjusting mechanism in the vertical direction, that is, the Z direction can be added if necessary. Further, either the adjusting mechanism 7 or the positioning blocks 2 and 3 can be fixed in the X direction. Of course, as the adjusting mechanism 7, a known mechanism can be appropriately applied. Further, the axis of the welding torch 8 can be directed in the Z direction for downward welding.

In addition, the portable frame 1 or positioning block 2,
If a magnet-type or vacuum-type suction tool that can switch between the attracted state and the attracted state is attached to the workpiece W, the portable single-sided welding device can be reliably positioned with respect to the workpiece W. can do. Furthermore, as shown in FIG. 3, substantially L arranged in the welding line direction, that is, in the Y direction.
If the interval of the frame-shaped portable frame 101 is increased to L ₂ and the spool-on-gun welding torch 8 is arranged to run within this interval L ₂ , the stability of the portable single-sided welding device is increased, In addition, when positioning for welding and when transporting the welding apparatus, the substantially L-shaped transportable frames 101, 101 guard the spool-on-gun welding torch 8, and the damage accident of the spool-on-gun welding torch 8 is drastically reduced.

As described above, the spool-on-gun welding torch 8 in which the small-diameter wire spool, the small-sized wire feeding device and the welding head are integrally formed is used. The spool-on-gun welding torch 8 is small and lightweight. Therefore, the traveling carriage 5, the guide rail 4 and the traveling carriage driving drive, on which the welding torch 8 is mounted via the adjusting mechanism 7, can be made smaller and lighter, respectively. Therefore, the welding device can be downsized to reduce the cost, and the worker can easily carry the lightweight welding device to the welding work position while holding the grip portion of the portable frame. Also, the work of positioning the lightweight welding device with respect to the welding line is easy.

Therefore, it is possible to realize a portable single-sided welding device with low cost and good workability.

Recently, there is a tendency for so-called high-grade welding work for aluminum and stainless steel to increase, but when performing short-duration welding with a small-diameter welding wire during this kind of high-grade welding work, the portable single-sided welding according to the present invention is performed. The device is particularly effective.

<Effects of the Invention> As is clear from the above description, the portable single-sided welding apparatus according to the present invention uses the spool-on-gun welding torch that is small and lightweight, so that the welding torch is supported for traveling. The traveling device can be reduced in size and weight, and therefore the welding device can be reduced in size and reduced in cost. Further, since the worker carries the lightweight welding device while gripping the grip portion of the portable frame, it is easy to carry the welding device and the lightweight welding device is used. Since the work of positioning with respect to is also easy, it is possible to realize a portable single-sided welding device with good workability.

[Brief description of drawings]

1 is a front view showing an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV of FIG. 5 and FIG. 5 are sectional views taken along line VV of FIG.
FIG. 6 is a front view showing a conventional example, and FIG. 7 is a plan view of FIG. 1 ... Portable frame, 101 ... Portable frame L-shaped part, 102 ... Portable frame gripping part, 2,3 ... Positioning block, 4 ... Guide rails, 5 ... Truck, 7 ...
… Welding torch adjustment mechanism, 8… Spool-on-gun welding torch, 13… Operation box, 131… Traveling vehicle speed adjustment dial, 132… Welding switch,

Claims (1)

(57) [Scope of utility model registration request] 1. In a portable single-sided welding device, a substantially L-shaped portable frame rising upward on the side opposite to the welding line is provided at intervals in the welding line direction, and the upper portion of the frame is arranged in the welding line direction. A pair of positioning blocks, which are connected to each other by grips and are spaced in the welding line direction, are provided on the portable frame so as to project in a direction orthogonal to the welding line, and a guide rail parallel to the welding line is provided on the portable frame. , A traveling carriage that travels along the guide rail by a drive is attached, and a spool-on-gun welding torch with a small-diameter wire spool, wire feeding device, and welding head integrally formed is mounted on the traveling carriage via an adjustment mechanism. A portable single-sided welding device which is mounted and has an operation box having a speed adjustment dial for a traveling carriage and a welding switch on the upper part of a portable frame.