JPS633741Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flux distributor for welding a strip electrode overlay.

For example, FIG. 1 shows an outline of a welding machine that performs horizontal electroslag strip electrode overlay welding. That is, the traveling cart 6 is provided with a band-shaped electrode reel 5.
and a feed roller 2 and its motor 8 that feed the strip electrode 1 sent from the reel 5 to the required welding location through the power supply chip, and furthermore, sprinkle flux in advance of the position where the strip electrode 1 is supplied. A flux dispersion jig consisting of a flux hopper 7, a hose 4, and a distributor 3, etc. are mounted. The flux melts after welding starts and becomes molten slag, and since the molten slag plays an important role in this type of overlay welding, it is necessary to be careful about its amount and depth. Therefore, the amount of flux to be sprayed must be adjusted during or during welding.

In particular, in horizontal electroslag strip electrode build-up welding, most of the scattered flux melts and becomes slag, but in order to prevent this molten slag from flowing out from both ends of the electrode, unmelted flux is spread and acts as a weir. is being carried out. That is, as shown in FIG. 2, the flux spread over the width of the strip electrode 1 is melted, but the spread flux 9 on both ends of the electrode 1 remains unmelted, and it is desirable that this serves as a dam for the molten slag 10. . In this state, if the amount of flux applied at the center of the electrode is too small, arcing will occur, which is undesirable. For this reason, when the flux distributor 3 is raised to increase the amount of flux spread, the amount of flux spread at both ends of the electrode becomes large, and the flux from both ends of the electrode flows into the slags at both ends more than necessary, causing the molten pool at both ends of the electrode to increase. Cooling may cause undercuts.

From the above, in strip electrode overlay welding, the appropriateness of the amount of flux applied greatly influences the welding result. In addition, in horizontal electroslag strip electrode overlay welding, the melting rate of flux varies depending on the welding conditions and type of flux, so it is desirable to be able to adjust the amount of flux at the center of the electrode and the amount of flux at both ends of the electrode separately. .

The present invention was developed in view of these points, and its gist is that, in a box-shaped flux distributor with an opening on one side that is attached to a strip electrode overlay welding machine, flux is distributed at both ends of the opening where flux flows out. A flux distributor for welding a strip-like electrode overlay is characterized in that a scraper plate for adjusting the amount is movably mounted and a damper is provided inside, and by using such a distributor, It becomes easy to adjust the amount of flux sprayed and stop the supply, which is extremely practical.

The present invention will be described below with reference to embodiments shown in the drawings.

Figure 3 shows an example of the distributor of the present invention, showing the hose 4 extending from the flux hopper.
The distributor main body 11, which is connected to the upper part of the distributor body 11, is formed in the shape of a box with an open bottom, and has notches 12 at both ends of the lower part of one surface. The notch 12 must be provided on the side facing the strip electrode when the distributor is used. Scraping plates 13 that can close the notches 12 at both ends of the distributor body 11 are attached, and the scraping plates 13 are rotatable about a set screw 14 at one end as a fulcrum. By manually determining the position of the scraping plate 13 using the knob 15 and fixing it with the setscrew 14, the amount of flux sprayed can be adjusted.

In practice, during overlay welding, the state of the molten slag and the sprinkled flux is monitored and the knob 15 is moved up and down with a rod-like object to increase or decrease the amount of flux sprinkled. Of course, it is assumed that the opening degrees of the scraping plates 13 at both ends can be adjusted independently.

In addition to the above-mentioned scraping plate 13, in the present invention, as shown in the figure, in order to adjust the flux supply amount and stop the supply, a distributor main body 1 is provided.
A damper 16 is provided inside the damper 1. The damper 16
For example, the damper 1 may be operated manually or automatically by operating an operating lever 17 connected to the shaft and protruding from the outside.
Operate 6.

Next, FIG. 4 shows another example of the present invention, in which cutouts 19 are formed in the lower part of both ends of the distributor main body 18 (the cutouts span two sides) as described above. A vertically movable scraping plate 20 having an L-shaped or U-shaped cross section is attached to the notch 19 so as to be able to close the notch. The scraping board 20
The vertical movement is achieved by inserting a set screw 22 provided on the scraping plate 20 side into a slide hole 21 provided in the distributor main body 18, loosening the set screw 22, and sliding the scraping plate 20 to a desired position. It is fixed by tightening the setscrew 22. In this figure, the right scraping plate is omitted to make the notch 19 clear. In this example as well, a damper 23 for controlling the amount of flux supplied is provided within the distributor main body 18, and is operated by an operating lever 24.

Note that the structure and shape of the scraping plates and notches provided at both ends of the distributor are not limited to the illustrated example, and other appropriate structures may be adopted.

Since the present invention has the above structure, the amount of flux sprayed on both ends of the electrode can be adjusted by rotating or vertically moving the scraper plate 13 or 20, and there is no need to raise or lower the distributor. Furthermore, since the present invention has a damper inside the distributor body, the flux can be supplied and stopped at the position closest to the dispersion position, and the total flux dispersion amount can be accurately grasped, and there is no risk of over-spraying. Moreover, in addition to raising and lowering the distributor and adjusting the position of the scraping plate, the supply amount can be adjusted using the damper, so the amount of flux sprayed at the center and both ends of the electrode can be adjusted separately, and the amount of sprayed can be controlled with precision. Therefore, it is possible to select the optimum flux distribution pattern according to the welding situation.

As explained above, according to the distributor of the present invention, it is easy to adjust the amount of flux sprayed, the existing distributor can be used as is, the structure is simple, the manufacturing cost is low, and the operation is easy. The practical benefits, such as ease of use, are extremely large.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a horizontal electroslag strip electrode overlay welding machine, Fig. 2 a and b are front and side views showing the state of the dispersion flux, and Fig. 3 a and b are a distributor according to the present invention. FIG. 4 is a perspective view and a sectional view showing one example of the present invention. FIG. 4 is a perspective view showing another example of the present invention. DESCRIPTION OF SYMBOLS 1... Strip electrode, 2... Feeding roller, 3... Distributor, 4... Hose, 5... Electrode reel, 6... Cart, 7... Flux hopper, 8
... Motor, 9 ... Spreading flux, 10 ... Molten slag, 11, 18 ... Distributor body, 12, 19 ... Notch, 13, 20 ... Scraping plate, 14, 22 ... Set screw, 15...knob,
16, 23... damper, 17, 24... operation lever, 21... slide hole.

Claims (1)

[Scope of utility model registration request] In a box-shaped flux distributor with an opening on one side that is attached to a strip electrode overlay welding machine, movable scraping plates for adjusting the amount of flux dispersion are installed at both ends of the opening through which the flux flows out, and a damper is installed inside. A flux distributor for strip electrode overlay welding, characterized in that it is provided with: