JPS61150781A - Simplified self-traveling carriage for welding - Google Patents

Abstract

PURPOSE:To make continuous forward and backward profile welding possible by supporting pivotally a driven wheel which is slidable in a prescribed range relative to a carriage and constituting the shaft thereof in such a manner that the shaft can turn by the certain range within the horizontal plane relative to the driven wheel. CONSTITUTION:A driving wheel 7 is provided to the carriage 1 and the driven wheel 8 is disposed to an axle 9 which is freely turnable within the horizontal plane via the shaft 10. The wheel 8 is made freely turnable and slidable relative to the top end of the axle 9 and the sliding range thereof is set at the height of the arc of the rotating angle of the wheel 8 or above. When the carriage 1 is driven, the wheel 7 travels parallel with a weld line and the wheel 8 tries to travel in the direction opposite from a vertical plate member 4, thereby pressing a profiling roller 3 to the plate 4. When the carriage 1 is driven in the opposite direction, the wheel 8 turns the axle 9 and presses the roller 3 in the same manner. The continuous forward and backward profile welding of a torch 6 is made possible by the above-mentionedmethod.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a simple self-propelled welding cart, and the present invention relates to a simple self-propelled cart for welding.
The aim is to make it possible to automatically follow the welding line no matter which direction the welding machine is turned, and also to enable reciprocating and welding.

[Conventional technology]

Equipped with a semi-automatic welding torch on a lightweight, small and simple self-propelled trolley,
Efforts are being made to achieve automatic welding, multi-arc welding, and higher efficiency. This type of welding equipment is particularly effective in horizontal fillet welding. However, many of the conventional simple self-propelled carts with a tracing mechanism run on one side (one direction), and two types of carts are used for those with different left and right hands, and welding for the length of the cart There is still some work to be done.

If it is a self-propelled trolley that can travel in any direction, it is not necessary to prepare two types with different orientations, and it is possible to improve ease of handling. As a proposal of this kind, JP-A-58
-65575, and the trolley disclosed in this publication is provided with a copying roller that follows the vertical plate member on the weld line side, and a difference in the diameter of each drive wheel on the weld line side and non-weld line side, and the It directs and runs in the direction of the vertical board using the moment force caused by the speed difference. However, as shown in the figure, in this proposal, the welding torch is mounted at the front (end) of the truck, and it is not possible to reduce the amount of welding left behind. This is because a welding torch must be mounted on the traveling carriage to reduce the amount of welding remaining, but if the torch is mounted between the copying rollers, the arm of the copying roller must be made longer, which increases the moment radius. Should I make the trolley longer?
It is necessary to lengthen the distance between the copying rollers, and the main body of the truck becomes long and large, making it difficult to handle.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION The present invention aims to solve these problems and provide a simple self-propelled welding cart that can run in either the forward or backward directions and facilitates continuous reciprocating welding or measures to reduce residual welding. .

[Means for solving problems]

The present invention provides a simple self-propelled trolley that has a tracing roller that contacts the non-welded side of a vertical plate member and that travels in a direction opposite to the direction of the vertical plates to trace a welding line. The wheel on the other side of the truck is a driven wheel, and the driven wheel is supported so that it can slide within a certain range in the direction of the axis, and this shaft is centered on the weld line side with respect to the driven wheel. A simple self-propelled welding cart is supported rotatably within a certain range on a horizontal plane, and the driven wheels are slidable within a range greater than the height of the arc obtained by the rotation angle. Even if the welding torch is mounted on the self-propelled dolly, that is, between the copying rollers, if the self-propelled dolly is placed in a state where the copying rollers are in contact with the vertical plate member of the material to be welded, the Stable tracing motion can be obtained even when traveling in the direction of travel. Therefore, it is possible to perform continuous reciprocating welding by repeatedly traveling forward and backward, and the welding torch is moved in the traveling direction on the self-propelled trolley. By installing a mechanism to do this, the amount of welding residue can be greatly reduced.

[Effect]

The operation of the present invention will be explained in detail below with reference to FIGS. 1 and 2. Figure 1 is a schematic plan view for explaining the traveling means, in which the non-welded side is the drive wheel and the weld line side is the driven wheel.
'b) The figure shows the case in the opposite direction indicated by the downward arrow. To explain Fig.
is provided between these copying rollers. Wheels 7 on the non-welded line side of the bogie 1 are driving wheels, wheels 8 provided on the weld line side at the center of the bogie are driven wheels, and an axle 9 is supported on the bogie 1 on a shaft 10 so as to be rotatable in a horizontal plane. Rotatably and slidably attached to the tip of the

For example, if the truck 1 is run in the direction of the arrow with the driven wheels 8 facing as shown in Figure +81, the drive wheels 7 are provided parallel to the welding line, so it will not run parallel to the welding line. Become. At this time, the driven wheels 8 try to run in the opposite direction to the vertical plate member 4, so the truck 1 receives a force in the same direction, the copying roller 3 is completely pressed against the vertical plate member, and the welding torch 6 etc. To drive along the lines. (Figure b1 shows the situation when traveling in the opposite direction, in which the direction of the driven wheels 8 changes, and as a result, it is also possible to travel along the welding line.

FIG. 2 explains the movement of the driven wheel 8.
For example, in a situation where the truck 1 is running as shown in FIG. 1 (al), the support shaft 10-3 and the axle 9-3 are
, the situation is that of the driven wheel 8-3.

In this case, the rotation angle of the axle 9-3 is θ (the angle regulating mechanism is not shown), and the driven wheel 8-3 is rotated at a part of the stop flange provided at the tip of the axle 9-3. Sliding is regulated. From this state, the trolley 1 is run in the opposite direction (Fig. 1(b)
), since the driving wheel 7 is provided parallel to the welding line, the support shaft 10-3 moves to 10-1 and then to 10-2, and the driven wheel touches the ground (stops) on the running surface. In this state, it is rotated by the axle 9 and the direction is changed. At this time, the relative relationship between the axle 9 and the driven wheel 8 is as shown in FIG. Arc height β obtained by distance R
Since it is made to be able to slide as described above, the load associated with the direction change of the driven wheels 8 is not transmitted to the trolley 1 (
9-3 to 9-1 in FIG. 2(b). Furthermore, when moving to 9-2, the axle 9 protrudes from the driven wheel 8, and the protruding length is 9
It reaches a maximum at the -1 position and returns to zero at the 9-2 position),
The trolley 1 can stably run in parallel. 2 driven wheels 8
After converting the θ direction, as explained in Fig. 1(b),
The component force caused by the displacement of the driven wheel 8 in the non-welding line direction acts on the vertical plate member via the copying roller 3, and stable copying travel is obtained.

Therefore, the truck of the present invention can run stably in any direction as long as it is centered on the weld line.

In addition, if the driven wheel 8 and the axle 9 do not slide, and the sliding distance is If it is shorter, the weight load of the driven wheels 8 will cause a force to move the support shaft 10, that is, the truck 1, closer to the welding line,
The copying roller 3 separates from the vertical plate member and copying welding becomes impossible.

〔Example〕

An embodiment of the present invention will be explained with reference to FIGS. 3 and 4. This embodiment is an example of reducing the amount of unwelded material, and the welding torch 6 is moved on the trolley 1 in a direction parallel to the welding line. It is equipped with a moving mechanism 12 and its drive motor 13. 11
is part of the torch holder. In other words, since the welding torch 6 is arranged between the copying rollers 3 as shown in FIG. This trolley is capable of welding up to approximately 20 pieces, and measures are taken to reduce unwelded residue.

In addition, FIG. 4 shows the rotation angle regulating mechanism of the driven wheel 8,
The rotation range can be adjusted using an adjustment bolt 15. Further, in order to increase the apparent weight of the truck 1, an electromagnet 14 is mounted inside the truck 1 with a gap between it and the running surface 5. In this embodiment, the case where one driven wheel is provided on the welding line side has been explained, but the same effect can be obtained even if two driven wheels are provided or the position where the driven wheel is changed is changed. . Furthermore, by using magnetic wheels as the driving wheels and driven wheels, it can also be used for vertical welding.

〔Effect of the invention〕

As described above, the bogie of the present invention can automatically trace in any direction, and is equipped with limit switches at the front and rear of the bogie, so that continuous back-and-forth welding can be performed using the signals from the limit switches, and as in the embodiment, welding residue is reduced. Moreover, the present invention has a wide range of practical applications, such as being able to perform butt welding by mounting an oscillator, and the effects of the present invention are great.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of the principle of the trolley of the present invention, and 3.
The figure is a partially cutaway end view showing an embodiment of the present invention;
The figure is a plan view of the rotation angle regulating mechanism. In the drawing, 4 is a vertical plate member, 3 is a copying roller, 1 is a trolley, and 7
is the driving wheel, 8 is the driven wheel, and l is the height of the string. Applicant: Nippon Steel Welding Industry Co., Ltd. Representative Patent Attorney Minoru Aoyagi (r) (Y')

Claims (1)

[Claims] In a simple self-propelled trolley that has a copying roller that comes into contact with the non-welded side of the vertical plate member and moves in the direction opposite to the direction of the vertical plate to follow the welding line, the wheels on one side of the trolley body are used as drive wheels, and the The wheel on the other side of the truck body is a driven wheel, and the driven wheel is supported so that it can slide within a certain range in the axial direction, and this shaft is centered on the weld line side with respect to the driven wheel in a horizontal plane. 1. A simple self-propelled cart for welding, which is supported so as to be rotatable within a certain range, and the slidable range of the driven wheels is greater than or equal to the height of an arc obtained by the rotation angle.