JPS5925590Y2 - Self-propelled multipurpose automatic welding machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a self-propelled multipurpose automatic welding machine that performs horizontal fillet welding or downward welding by submerged arc welding or gas shielded arc welding while moving along a long welding line. .

When welding ship hulls, stiffeners, etc., welding is often carried out inside long straight butts or corners.

In the case of such welding, submerged arc welding or gas-shielded arc welding is often performed in a horizontal or downward position using an automatic welding machine that moves by itself along the weld line.

By the way, submerged arc welding and gas shielded arc welding cannot be performed with one welding machine.

This is because submerged arc welding and gas shielded arc welding: (a) The former requires powdered flux, and the latter requires shielding gas.

(b) The former welding current mainly utilizes AC drooping characteristics,
The latter mainly uses DC constant voltage characteristics.

(c) The shape of the torch is different.

In the former case, the arc voltage is controlled so that the arc length is constant, and in the latter case, the arc voltage is controlled so that the welding condition is stable.
Self-controlled due to constant voltage characteristics.

(E) In particular, the latter requires crater treatment at the final stage of welding in order to prevent crater cracks from occurring.

There are differences such as:

Therefore, conventionally, welding machines have been designed and manufactured for each welding method.

In addition, differences in welding positions, such as horizontal fillet position for fillets and downward position for butts, as well as differences in welding wires (for example, differences in diameter, presence or absence of filler, etc.) can be handled by using a single welding machine. This was a factor that hindered the

In this way, it is extremely uneconomical to change the welding machine for each welding method or position.

Therefore, this idea is to create a self-propelled multi-purpose automatic welding machine that can perform various welding functions by standardizing parts that can be shared for various types of welding as much as possible, and by replacing accessories in other parts. This is what we intend to provide.

Hereinafter, preferred embodiments of this invention will be described in detail.

FIG. 1 is a side view of the main body of a self-propelled multi-purpose automatic welding machine and an overall configuration diagram of the welding machine.

As shown in the figure, the welding machine of this invention mainly consists of the main body 1.
, a welding power source 55, and other accessories.

The main body 1 includes a truck 2 having wheels 3, as shown in FIG. 1 and FIG. 2, which is a front view of the main body.

A truck drive motor 4 is installed inside the truck 2, and the output of this motor 4 is transmitted to the wheels 3 via a transmission mechanism 5 including a reduction gear, a clutch, and the like.

A frame 7 is erected slightly at the rear of the truck 2, and a movable base 11 is attached to the front.

As shown in FIG. 3, the movable base 11 has a horizontally extending slide base 13 fixed to a stand 12 fixed on the trolley 2, and slides back and forth on this slide base 13 (in a direction perpendicular to the plane of the paper). Attach the slider 14 so that it is possible to do so.

A longitudinal position adjustment screw 16 with a bundle 15 fixed to one end is screwed into the slide base 13, and the slider 14 is attached to a locking fitting (not shown) on the longitudinal position adjustment screw 16.
It is locked by.

Therefore, by rotating the longitudinal position adjusting screw 16 and moving it back and forth, the slider 14 can be moved back and forth together with the longitudinal position adjusting screw 16.

Further, a height adjustment screw 19 having a bundle 18 fixed to one end is screwed into the slider 14, and the height adjustment screw 19 is screwed into the slider 14.
9, a movable base 21 is locked by a locking metal fitting 20.

Therefore, by rotating one height adjustment screw and raising and lowering it, the movable base 21 together with the height adjustment screw 19 can be moved.
can be raised and lowered.

The locking means for the longitudinal position adjustment screw 16 and the slider 14 is the same as the locking means for the height adjustment screw 19 and the movable base 21.

A wire reel 23 for feeding out welding wire is rotatably attached to the frame 7.

In addition, a pair of feed rollers 25 for feeding the wire and a wire feed motor 27 for rotationally driving the rollers are fixed to the movable base 21 of the movable base 11, and a clamp type 1 - The fixture 28 and the wire strainer 29 for correcting the bending of the wire are attached.

Then, from the wire reel 23 to the wire strainer 2
A tubular wire guide 30 extends up to 9.

As shown in FIG. 1, the frame 7 has a front panel 32.
Voltage adjustment knob 33, running speed adjustment knob 34, welding start switch 35, welding stop switch 36, voltmeter 37
The operation box 31, which is equipped with the following items, is fixed.

This operation box 31 has a built-in welding start/stop switch circuit, a trolley running control circuit, a wire feeding control circuit, etc., and is also provided with a control cable connector 39 and a connector 38 for a gas shielded arc welding control unit. .

Further, as shown in FIG. 2, the frame 7 has a tapped hole 9 for attaching a flux hopper 41 or a gas shield arc welding control unit 45, and a metal fitting 8 is fixed thereto.

The flux hopper 41 stores flux used in submerged arc welding, and supplies an appropriate amount of flux to the welding part during welding.

The shielded arc welding control unit 45 incorporates circuits for welding current control and wire feed speed control for crater treatment required when performing gas shielded arc welding.

Further, a connector 46 that engages with the connector 38 of the operation box 31 is provided on the side surface of the gas shielded arc welding control unit 45, and a control cable connector 47 is provided on the bottom surface.

As shown in FIG. 1, a welding cable connector 51 is fixed to the rear part of the truck 2.
1 is electrically connected to a welding torch, which will be described later, via a cable 61.

Also, in parallel with this connector 51, there is a joint 5 for an inert gas gas hose used during gas shield arc welding.
3 is a provision.

There are two types of welding power sources 55: AC power sources and DC power sources.

The former is used for submerged arc welding, and the latter for gas shielded arc welding.

The input side of the power supply 55 is a 200/200 V three-phase AC power supply 5
7, and the output side can be connected to the welding cable connector 51 via a welding cable 61.

The input side of the power supply panel 56 is connected to two poles of the three-phase AC power supply 57 via a cable 58, and the output side is connected to the connector 3 of the operation box 31 via a control cable 62.
9, it can also be connected to the connector 47 of the shielded arc welding control unit 45 via the control cable 63.

Furthermore, in the case of a DC power source, an Ar gas cylinder 65 and a CO2 gas cylinder 66 used as shielding gas are piped through a gas pipe 67, and the outlet side thereof can be connected to the gas hose fitting 53 through a gas hose 68. ing.

The main body 1 and the welding power source 55 have been described above.

The accessories will be explained together with the operation and functions of the self-propelled multi-purpose automatic welding machine of this embodiment when performing submerged arc welding and gas shielded arc welding.

First, when performing submerged asiarc welding, a flux hopper 41 is attached to the main body 1 as shown in FIG.

That is, the flux hopper 41 is attached to the frame 7 of the truck 2 by screws to the metal fittings 8.

(See FIG. 2) Then, a flux supply pipe 42 curved in a dogleg shape is attached to the bottom of the flux hopper 41.

Further, a submerged arc welding torch 71 is attached to the torch fixing fitting 28, and the adjustment screws 16 and 19 of the movable base 11 are used so that the tip of the torch 71 is located at an appropriate position in line with the tip of the flux supply pipe 42. Position.

In the case of the embodiment shown in FIG. 4, since the fillet is welded, the flux supply pipe 42 and the torch 71 are inclined at approximately 45 degrees, and their tips point toward the inside of the fillet.

Furthermore, on the side of the trolley 2, there is a material to be welded A whose tip is in a vertical position.
A copying arm 75 is attached which contacts and uses this as a guide.

On the other hand, the control box 31 and the AC power source are connected via the control cable 62, and the welding cable connector 51 provided on the trolley 2 and the AC power source are connected via the welding cable 61.

Once the flux hopper 41 and the submerged arc welding torch 71, which are accessories for submerged welding, are attached to the main body 2 as described above and the AC power source is connected, the welding voltage, wire feeding speed and The traveling speed of the trolley is adjusted on the operation box 31.

(See Fig. 1) Then, when the welding start switch of the operation box 31 is turned on, the main body 1 moves at a constant speed to the welding material B in a horizontal position.
Submerged arc welding is automatically performed while the welding wire is supplied through the torch 71 and flux is supplied from the flux supply pipe 42.

The speed of carriage running and wire supply are controlled by respective control circuits in the operation box 31, and the amount of flux supplied is adjusted by a regulating valve 43 attached to a flux supply pipe 42.

(See FIG. 4) Next, the case of performing gas shield arc welding according to FIG. 5 will be described.

A gas-shielded arc welding control unit 45 is attached to the frame 7 of the main body 1 instead of the flux hopper 41, and a gas-shielded arc welding torch 73 is fixed to the torch fixing fitting 28.

The gas shielded arc welding control unit 45 is connected to the frame 7
When the connector 46 of the shielded arc welding control unit 45 is connected to the connector 38 of the operation box 31
connected to.

In the case of the embodiment shown in FIG. 5, welding is performed with the butt portion facing downward, so the movable base 21 of the movable table 11 is moved forward and the torch 73 is set so as to be vertical.

The welding power source 55 is a DC power source, and the welding cable connector 51 provided on the main body 1 and the welding power source 55 are connected via a welding cable 61, and the connector 39 of the operation box 31 and the gas shield arc welding control unit 45 connectors 46 are connected to a welding power source 55 via control cables 62 and 63, respectively.

Furthermore, a gas hose joint 53 provided on the main body 1 and a
A gas pipe 67 for a mixed gas of r and CO2 is connected through a gas hole 68, and the mixed gas is supplied to the torch 73.

Once the preparation of the apparatus is completed as described above, welding can be performed automatically in the same manner as submerged arc welding.

In the case of gas-shielded arc welding, crater cracks are likely to occur in the crater formed at the end of the weld, so in order to prevent this cracking, the welding current and wire feed speed for welding the part of the crater are specially adjusted. .

This adjustment is automatically performed by the gas shielded arc welding control unit 45.

In this invention, the accessories that are replaced depending on the welding method are the flux hopper 41 as described above. The gas-shielded arc welding control unit 45, the torches 71 and 73, and the copying arm 75, wheels 3 of the trolley 2, wire feeding roller 25, etc. are also replaced as necessary.

The self-propelled multi-purpose automatic welding machine of this invention has a dolly, a dolly drive device, a welding wire feeding device, a welding wire feed drive device, and an operation box containing control circuits for the dolly running and wire feeding in the welding machine body. The submerged arc welding flux hopper and the gas shielded arc welding control unit are made common, and the submerged arc welding torch and the gas shielded arc welding torch are also interchangeable.

Therefore, by attaching the above-mentioned replaceable accessories to the welding machine body according to the welding method, either submerged arc welding or gas shielded arc welding can be performed, and the welding equipment can be significantly economized. .

[Brief explanation of the drawing]

Fig. 1 shows one embodiment of this invention, and shows a side view and overall configuration diagram of the main body of a single-stroke multipurpose automatic welding machine, and Fig. 2 shows an embodiment of the invention.
Figure 3 is a sectional view of the movable table installed in the main body shown in Figure 1, Figures 4 and 5 are for submerged arc welding and gas shielded arc welding, respectively. FIG. 3 is an assembled front view of the welding machine main body. 1...Main body, 2...Dolly, 4...
... Motor 5 ... Transmission mechanism, 11 ...
...Movable base, 25...Wire feeding roller,
27... Motor, 41... Submerged arc welding flux hopper, 43... Shield arc welding control unit, 71... Submerged arc welding torch, 73... ...Torch for shielded arc welding.

Claims (1)

[Scope of utility model registration request] Truck 2, truck drive device 4, 5, welding wire feeding device 2
5.27 and a welding machine comprising a welding machine main body 1 consisting of an operation box 31 including a control circuit for carriage running and wire feeding, and a welding power source 55, in which a frame 7 is erected near the rear on the carriage 2. , the operation box 31 and the wire 1-rule 23 are attached to the frame 7, and further to the frame 7,
A mounting bracket 8 is provided that allows the submerged arc welding flux hopper 41 and the gas shielded arc welding control unit 45 to be mounted interchangeably, and a mounting bracket 8 is provided near the front of the trolley 2 that can be moved horizontally and vertically. A movable table 11 is arranged, and a torch fixing fitting 28 is provided on the movable table 11, which allows the wire feeding device 25, 27, the submerged arc welding torch 71, and the gas shield welding torch 73 to be attached interchangeably. A self-propelled multi-purpose automatic welding machine characterized by the following: