JPH0227982Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an overlay welding device that performs overlay welding when the surface of the track roller in contact with the crawler track is worn out, for example. The welding width is adjusted accordingly and overlay welding is performed to the required width.

(Prior Art) The cross section of a typical truck roller 1 is as shown in FIG.
In many cases, the angle of inclination is different.

Furthermore, since the build-up layer generally has a plurality of layers, the left and right reciprocating motion of the torch 4 must be widened outward by different distances at both ends as one goes to the upper layer.

Therefore, conventionally, in addition to mechanical means such as a cam crank, a pair of limit switches 6 and 7 whose position can be adjusted by an actuating piece 5 linked to the horizontal movement of the torch is actuated by a device as shown in Fig. 2 to perform welding. The position of the limit switch was manually changed for each layer.

For this reason, a dedicated worker is required during the welding work, which is an uneconomical work.

(Purpose) The purpose of this project is to provide a fully automatic overlay welding device that does not require a dedicated worker in all processes until the necessary overlay thickness is obtained in oscillation welding. Even if the turning position of the torch is different for each layer, the reversal operation is automatically performed at the appropriate position, so that a uniform build-up surface can be obtained for each layer.

(Structure) The present device includes a switchbox which is attached to a torch that moves in a zigzag manner across the width of the surface to be overlaid, that is, between the inclined walls, and has a built-in pair of switches that reverse the zigzag movement of the torch;
It is composed of an operating swing lever provided between the pair of switches and a pair of guide pieces fixed to the welding machine body and set to the inclination angle of the inclined wall and the distance between the walls, and the movement width of the torch is Overlay welding is performed by automatically changing the width according to the required welding width.

(Example) The present device will be explained below with reference to the drawings.

The torch 4 is set at A in Fig. 3 for the entire width of the surface to be welded.
It moves back and forth in a zigzag pattern like an arrow. On the other hand, the roller 1, which is the object to be welded, is driven in steps by a required angle and rotates once. Each time welding of each layer is completed, the torch rises by the thickness of the welding layer (arrow B). Since these drive devices are similar to conventional devices, they are omitted from the diagram.

Reference numeral 10 denotes a mounting rod attached to the torch, and is attached with a mounting screw 11 so as to be adjustable in left and right positions.

Reference numeral 12 denotes a fine height adjustment device fixed to the end of the mounting rod and fitted into the vertical rod 13.

Reference numeral 14 denotes a connecting rod fixed to the lower end of the rod, and supports a switch box 15.

Reference numerals 16 and 17 indicate limit switches, which are fixed so that their actuators 16a and 17a face each other.

18 is a swinging lever having a fulcrum 19;
Its upper end 18b abuts the actuator of the limit switch.

Reference numeral 20 is for regulating the free movement of the rocking lever, and may be omitted.

Reference numeral 21 denotes a lever collision device, which includes a pair of guide pieces 22 and 23 whose angle can be changed.

24 and 25 are angle adjustment screws. Guide piece 23
is provided on a holder 27 that slides along the rod 26 and its position is defined by a set screw 28.

29 and 30 are marks for aligning the height positions of the welding start points, respectively.

In using the device of the present invention, the angles of the guide pieces 22 and 23 of the lever collision device are set in accordance with the angles of both side walls of the overlay surface of the overlay welded body, and the interval between them is made to match the distance between the side walls.

Next, move the tip of the torch to the welding start point on one side, and at that position
set so that the limit switch comes into contact with the corresponding guide piece and the limit switch is activated. The torch is driven to start oscillation welding, for example moving in the direction of the arrow R in FIG.

When the tip 18a of the lever comes into contact with the guide piece 23, the upper end 18b of the lever 18 presses the actuator 17a of the switch 17, thereby reversing the driving direction of the torch and moving it in the direction of the arrow L.

When the zigzag motion of the torch is repeated and the roller 1 makes one revolution, the torch 4 and the switch box 15
increases by the weld thickness.

As a result, the point of contact of the lever tip 18a with the guide pieces 22 and 23, that is, the reciprocating distance is widened.

In the present invention, the shape of the operating lever 18 is arbitrary, and the collision device is connected to the guide piece 22 as shown in FIG.
23 may be provided with an angle scale plate 31, one of which may be fitted into the slide groove 32, so that the angle adjustment screw 33 also serves as the position adjustment screw 28.

(Effects) According to this method, a welding layer of the required thickness can be automatically obtained for each layer, so there is no need for any manual operation by dedicated workers during this period. However, since an appropriate weld width can be obtained for each weld layer, a uniform build-up layer can be obtained.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the overlay welding part of the truck roller, Figure 2 is an explanatory diagram of the conventional device, Figure 3 is a front view of the main parts of the proposed device, and Figure 4 is the relationship between the operating lever and the collision device. FIG. 5 is a front view of another embodiment of the collision device. 15... Switch box, 18... Operating lever, 22, 23... Angle setting guide piece.

Claims (1)

[Scope of utility model registration request] In an apparatus for overlay welding by oscillation welding on a build-up surface having sloped walls on both sides, a collision device including a pair of guide pieces set to the angle of the sloped walls and the distance between the walls is fixed to the welding machine body. A switch box is connected to the torch of the welding machine and is adjustable in horizontal and vertical positions, and the switch box is located between a pair of limit switches for reversing the horizontal movement of the torch and the pair of limit switches. 1. An automatic overlay welding device for grooves with irregular cross-sections, which includes a built-in rocking action lever for a switch that swings, and is configured such that the tip of the rocking lever is located between the guide pieces.