JPS6025333Y2 - automatic welding equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic welding device that welds objects to be welded while running a self-propelled truck equipped with a welding torch.

Generally, when performing vertical welding while running a self-propelled truck, the weight of the truck and the weights of the welding torch, wire reel, wire feeding device, and various cables mounted on the truck act in a direction that causes the truck to fall.

By the way, for long objects to be welded, it is better to weld continuously at one time, and the welding result is better and the work efficiency is improved, but as the object to be welded becomes longer, the shielding gas hose Moreover, the electric control cable becomes long and heavy, and the amount of wire wound around the wire reel also increases, resulting in a large weight.

For this reason, in the conventional device, it is necessary to increase the size of the truck itself and also requires a large-scale drive device.

However, if the truck itself becomes larger in size, it takes time to set the truck to the object to be welded, and in some cases, a crane may be required when setting the truck.

Furthermore, if the weight of various devices mounted on the truck becomes large, so-called knocking may occur when the truck is running, which may lead to welding failure.

An object of the present invention is to provide an automatic welding device that eliminates the above-mentioned conventional drawbacks.

That is, the present invention includes a self-propelled trolley equipped with a welding torch,
A driven trolley equipped with a wire reel and a wire feeding device is provided to distribute the weight, and an interval when the self-propelled trolley and the driven trolley approach each other and an interval when they are separated are set. This allows the welding wire to be fed smoothly from the wire feeding device to the welding torch.
The present invention provides an automatic welding device that achieves good welding results.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2, reference numeral 1 denotes a workpiece having a curved surface part 101 and a flat part 102, 2 a self-propelled cart with a drive source that moves approximately along the surface of the workpiece 1, This cart is guided by, for example, a rail 3 arranged parallel to the surface of the workpiece 1 and the road, and is configured to be movable along the rail 3 by driving a drive wheel (not shown) that engages the rail 3. There is.

Reference numeral 4 denotes a driven truck arranged above the self-propelled truck 2, that is, in the Y-direction, and this driven truck is configured to move up or down while being guided by, for example, a rail 3.

This driven truck 4 is equipped with at least a wire reel 5 and a wire feeding device 6, and the welding wire 7 wound around the wire reel 5 is transferred to the welding device mounted on the self-propelled truck 2 by the wire feeding device 6. It is fed to the welding position via the torch 8.

It is preferable to use a so-called conduit to guide the wire between the wire feeding device 6 and the welding torch 8.

Reference numeral 9 denotes a hoisting device for raising the driven cart 4, and the hoisting device 9 is a drive source 9 installed at the upper end of the workpiece 1, for example.
01, and a flexible member 903, such as a cable or chain, whose free end is locked to the driven cart 4 and whose other end is wound around the winder 902. There is.

This hoisting device 9 is started or stopped by an electric signal generated by an interval detecting device to be described later.

FIG. 2 shows an electric signal for starting or stopping the drive source 901 of the hoisting device 9 in order to set the distance between the self-propelled truck 2 and the driven truck 4 when they approach each other and when they separate. FIG. 2 is a detailed diagram of the interval detection device 19 that generates.

Reference numerals 11 and 12 refer to first and second levers, each of which has one end pivotally supported by, for example, the self-propelled truck 2 and the driven truck 4, respectively.
3 is a first flexible member, for example, a cable, which is disposed between the driven cart 4 and the free end of the first lever 11; 14 is a self-propelled member, similar to the first flexible member 13; This is a second flexible member disposed between the type truck 2 and the second lever.

In this case, the length of the first visibility member 13 is 1□, and the length of the second visibility member 13 is 1□.
When the length of the visibility member 14 is 1□, the lengths of the respective members are set so that the relationship between the respective members is 11>1□.

15 and 16 are first and second detectors for detecting the rotation states of the first and second levers 11 and 12, respectively, and are comprised of, for example, a Mitsutwitch; 17 and 18 are the first and second detectors; The levers 11 and 12 are spring members that urge the self-propelled truck 2 and the driven truck 4, respectively.

The above-mentioned components 11 to 18 constitute an interval detection device 19.

Next, the operation of the above embodiment will be explained.

To start welding, first arrange the self-propelled cart 2 and the driven cart 4 as shown in Fig. 1, align the welding torch 8 with the line to be welded using an appropriate adjustment device (not shown), and then By driving a drive source (not shown) of the mobile truck 2, the self-propelled truck 2 is caused to travel in the Y□ force direction.

At the same time as the self-propelled trolley 2 starts traveling in the Y1 direction, or after a period of time has elapsed since the start of traveling, the wire feeding device 6 is driven and the welding wire 7 is fed to the welding torch 8 while welding is being carried out. It is done.

In this case, since the drive source 901 is not operating, the driven truck 4 is held in a stopped state.

Therefore, the self-propelled truck 2 travels in the Y direction, and the self-propelled truck 2 and the driven truck 4 gradually approach each other.

For example, as shown in FIG. 2, when the self-propelled truck 2 and the driven truck 4 approach each other and the limit switch 15 is turned off and the limit switch 16 is turned on, an electric signal is generated.

When this electric signal is generated, the drive source 901 of the winding device 9 is driven by an electric control device (not shown) so that the flexible member 903 is wound around the winding tool 902.

The winding speed of the flexible member 903, that is, the Y of the driven truck 4,
The upward movement speed v1 in the direction is selected to be faster than the welding speed v2 of the self-propelled trolley 2.

By the way, even when the limit switch 16 is activated and the driven truck 4 moves up, the self-propelled truck 2 always maintains the welding speed of Y.
Welding is performed while traveling in the direction of .

Therefore, when the driven truck 4 starts to move up, the driven truck 4
It precedes the self-propelled truck 2 in the Y1 direction by a speed difference represented by 1-v2, and the interval between the self-propelled truck 2 and the driven truck 4 gradually increases.

Although the limit switch 16 is turned off by the movement of the driven truck 4, the drive source is not stopped by this.

When the driven truck 4 and the self-propelled truck 2 move apart by a predetermined distance, that is, a distance 1=1□-1□, the limit switch 15 is turned on and generates an electric signal.

This electrical signal controls the drive source 901 of the hoisting device 9 to stop.

In this way, by appropriately selecting the lengths 11 and 1° of the flexible members 13 and 14 of the distance detection device 19, the approach distance and the separation distance between the self-propelled truck 2 and the driven truck 4 can be minimized. Can be easily set up.

In this way, the drive source 901 is driven and stopped by the electric signal of the distance detection device 19 which is activated when the self-propelled trolley 2 and the driven trolley 4 approach and separate, and therefore the self-propelled trolley 2 traveling at the welding speed On the other hand, welding progresses while the driven truck 4 moves intermittently.

The minimum distance between the self-propelled truck 2 and the driven truck when the distance detection device generates an electric signal is of course selected to such an extent that the welding wire can be fed smoothly.

If the interval detection device 19 is configured as shown in FIG.
Even if the postures of the self-propelled trolley 2 and the driven trolley 4 change,
That is, one or both of these carts each have a curved surface portion 10.
1 and the straight section 102, the distance detection device 19 does not impair its distance detection function and reliably generates an electric signal by mechanically coupling the lever, limit switch, spring member, and flexible member. can be done.

Note that the detector can be an optical %E switch, a proximity switch, or the like.

Further, two of the first and second levers may be co-rotationally supported on one side of the self-propelled truck 2 or the driven truck 4.

In the above explanation, the self-propelled cart and the driven cart are configured to move while being guided by the rails, so positioning the rails with respect to the line to be welded is troublesome, but once the rails are set, Since each truck is reliably guided by the rails, subsequent operations are safe and easy.

Of course, each truck may be driven by a magnet roll without using the rails, and the truck may be run, for example, along the groove of the workpiece.

However, when considering the stable running performance and loading capacity of the bogie,
The rail type is preferable to the magnetic roll type.

Further, a drive source 901 and a winding tool 902 are mounted on the driven truck 4, and the free end of the flexible member 903 is locked to a stopper placed at the upper end of the workpiece 1 to form the winding device 9. You can also do that.

In this way, the drive source 901 and the winding tool 90 are connected to the driven cart 4.
2 is mounted, the dead weight of the drive source 901 and winding tool 902 acts on the driven truck 4 together with the driven truck 4, so the drive source needs to be larger and the space above the driven truck 4 is is restricted.

Therefore, it is preferable that the drive source 901 and the winding tool 902 be arranged at the upper end of the workpiece 1.

Note that if the self-propelled dolly 2 and the driven dolly 4 are connected by a cable that is longer than the installation spacing between the self-propelled dolly 2 and the driven dolly 4, the drive source or drive transmission for the self-propelled dolly 2 can be Even if parts of the mechanism are damaged and the self-propelled trolley 2 becomes unable to move, the self-propelled trolley 2 is connected to the driven trolley 4 via cables, so the self-propelled trolley 2 The apparatus is not damaged by falling, and the occurrence of personal accidents due to the falling of the self-propelled trolley 2 is prevented.

In the above embodiment, an example in which welding is performed while the self-propelled trolley is being moved up and down has been described, but it goes without saying that the present invention can also be applied to cases where welding is performed while the self-propelled trolley is being lowered. It is.

As described above, according to the present invention, large heavy objects such as wire reels and wire feeding devices that are not directly involved in welding are mounted on the driven cart, so that the self-propelled type equipped with a welding torch can be used regardless of the welding length of the object to be welded. The trolley can be made smaller and lighter, and the self-propelled trolley moves smoothly without knocking, making it possible to successfully weld even long workpieces. Alternatively, even if the postures of both sides change, the electrical signal for controlling the drive of the driven truck on and off can be reliably obtained by the switching device, so the approach and separation distance between the self-propelled truck and the driven truck can be accurately controlled. The welding wire is automatically set and fed smoothly,
Therefore, automatic welding can be carried out reliably and is extremely effective industrially.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is an enlarged view showing a switching device. 1... object to be welded, 2... self-propelled trolley,
4... Driven truck, 7... Welding wire,
8...Welding torch, 9...Hoisting device,
11 and 12...first and second levers,
13 and 14...first and second flexible members, 15 and 16...first and second detectors, 17.18...spring members, 19...
- Interval detection device.

Claims (1)

[Scope of utility model registration request] A self-propelled trolley carrying a welding tool and traveling at a constant speed, a driven trolley capable of traveling at a higher speed than the self-propelled trolley, and interval detection that generates an electrical signal based on the interval between the self-propelled trolley and the driven trolley. In the automatic welding apparatus, the interval detecting device includes a control device that controls on/off a drive source of the driven truck based on an electric signal obtained from the interval detecting device. first and second levers each rotatably supported on a trolley;
and a spring member that urges the second lever toward the cart on which both levers are supported, and between the first lever and the cart facing the first lever, and between the second lever and the second lever.
first and second flexible members having different lengths respectively disposed between the lever and the cart facing the lever; and first and second flexible members that detect the rotational positions of the first and second levers, respectively. An automatic welding device comprising a second detector.