JP2523975Y2 - Copper metal for automatic rail welding - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copper metal used for automatically welding rails by an electroslag welding method.

[0002]

2. Description of the Related Art As a copper equivalent used for butt welding rails by an electroslag welding method, a bottom member described in JP-A-58-151980 and a copper member described in JP-A-2-280982 are disclosed. There is a backing money listed.

The bottom member described in Japanese Patent Application Laid-Open No. 58-151980 is provided with a long recess in the direction of the welding line on the surface of a single material, and when welding, a heat insulating material and an insert are loaded into the recess and the surface to perform welding. This is a bottom member which prevents seizure of the weld metal on the inner bottom member and leakage of molten slag to form a uniform weld.

The backing metal described in Japanese Patent Application Laid-Open No. 2-280982 is stable after the welding is started in the direction of the welding line on the surface of the single material and before the molten slag bath of electroslag welding reaches the rail foot. This is a backing metal provided with a groove having the necessary depth to be able to be in a state.

[0005]

The above-mentioned prior arts are all backing abutments which are used to automatically weld rails by electroslag welding and which are in contact with the underside of the rail foot.
Various attempts have been made to simplify the welding operation, but some problems still remain.

That is, in the bottom member disclosed in Japanese Patent Application Laid-Open No. 58-151980, a heat insulating material and an insert, which are effective in preventing molten slag from flowing out and forming a weld bead, are used for the bottom member. When loading, the work is important to ensure that welding proceeds smoothly. If loading is insufficient, adhesion to the back of the rail foot will be insufficient, and molten slag, etc. will flow out during welding. As a result, welding must be interrupted and there is a problem in work efficiency and welding integrity.

In the backing described in Japanese Patent Application Laid-Open No. 2-280982, since the frame is formed of a single material, the volume of the backing is increased to obtain a heat radiation effect, and the size of the backing is increased. The width has also become wider. Therefore, when trying to abut the backing metal on the back surface of the rail foot, the adhesion between the back surface of the rail foot and the backing metal surface is not always sufficient, and the molten slag may leak during welding. is there. In addition, an increase in the size of the backing metal also increases the weight and increases the labor burden on the welding operator. In addition, deep grooves for stabilizing electroslag welding provided in the welding line direction,
Since the side wall is vertical from the bottom to the open end, in the removal operation after welding, the solidified slag bites into the gap between the weld metal and the inner wall of the groove, and it takes time to remove.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the gist of the present invention is to provide a rail which continuously welds from a rail foot to a head by an electroslag welding method. In the copper metal surrounding the periphery of the rail used for automatic welding of steel, the metal that comes into contact with the back of the rail foot is divided into three parts in the rail axis direction orthogonal to the welding line, and the center metal is electroslag welded at the start of welding. A groove with a pair of pipes for passing opposing water flow is provided on both sides of the joint, which is provided with a concave groove in the welding line direction to stabilize It is a copper metal for welding, and a copper metal for automatic welding of a rail in which the central metal is further divided into two parts in the axial direction of the rail. Incline toward the open end In copper losses for automatic welding of rail is the upper wide-mouth-shaped grooves.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the copper alloy shown in the drawings. 1 and 2 are a side view and a perspective view, respectively, showing an example of an embodiment of the copper alloy according to the present invention. In the figure, 1a, 1
Reference numeral b denotes a rail, which is arranged in such a manner that cross sections perpendicular to the axis are abutted with each other to form a groove in welding.
Also, the copper metal is a metal metal 2 in the center, metal metals 3a and 3b on both sides,
Concave groove 4 oriented in the direction of the welding line, through-hole 5, dished bolts 6a, 6b, bottom plate 7, bolts 8a, 8b, pipe 9
a, 9b, the center metal 2 is symmetrically abutted on the back surface of the foot of the rails 1a, 1b by tightening the bolts 6a, 6b with pans, so that the molten slag flows out during welding. Electroslag welding is stabilized in the obstructing concave grooves 4.

The through-hole 5 is a hole for assembling the side supports 3a, 3b and the center support 2 with the bolts 8a, 8b. The through hole 5 has a hole diameter larger than the outer diameter of the bolts 8a, 8b. The abutment can have a degree of freedom in up and down and depth between the abutments 3a and 3b on both sides by the dimensional difference between the hole diameter and the bolt outer diameter. Further, both sides of the abutment 3a, 3b are fixed to the surface of the bottom plate 7 with bolts or the like to support the center abutment 2 and at the same time, by the cooling water flowing through the tubes 9a, 9b provided in the abutment 3a, 3b. The volume of the central metal 2 can be minimized because the central metal 2 is indirectly cooled to obtain a heat dissipation effect, thereby preventing the central metal 2 from melting and seizing due to resistance heat during welding. It is possible to reduce the size of the entire copper abutment of the present invention and to facilitate the abutment of the rails 1a and 1b on the back surfaces of the feet.

Further, since the width of the center abutment 2 can be made narrower than that of the conventional backing metal, even if the rails 1a and 1b have a weak centering and have a step on the back surface, the adhesion to the back surface is lower than that of the conventional backing metal. Outflow of molten slag during welding can be prevented. In addition, when the metal is divided into three parts and the central metal 2 is seized with the weld metal due to an accident during welding, it is necessary to newly manufacture the metal 3a and 3b on both sides. Instead, it is sufficient to manufacture only the central metal 2 and the manufacturing cost can be reduced as compared with the case where the conventional metal back is burned and newly manufactured. In addition, both sides 3a, 3
Since the material of b does not directly contact the molten slag, etc., it is not necessary to stick to copper, and it is sufficient if the material has good thermal conductivity. Can be improved.

The bolts 8a and 8b are only required to be able to assemble the center abutment 2 and the abutments 3a and 3b on both sides and the bottom plate 7, and may be simply pins without being particular about the bolts. Bolts 6a and 6b with pans
Is a bolt for abutting the center abutment 2 on the back surface of the foot of the rails 1a and 1b within a range in which the abutment 2 can be freely moved between the abutments 3a and 3b on both sides. Although it is not necessary, the bolt with a plate does not damage the back surface of the center abutment 2 and the center abutment 2 is connected to the rails 1a and 1b.
, So that the outflow of molten slag and the like during welding can be reliably suppressed.

The center abutment 2 and the concave groove 4 may have the cross-sectional shape shown in FIG. 1, but the solidified slag formed during welding in the operation of removing the copper abutment from the rails 1a and 1b after welding. May bite into the gap between the inner wall of the concave groove 4 and the weld metal and cannot be easily removed. Therefore, if the central abutment 2 is divided into two parts as shown in claim 2 and FIG. 3 of the present invention, even if the molten slag is caught after welding, the central abutment 2 is formed into a concave groove 4. The work efficiency is good because it can be separated and removed from the vicinity of the center in the lateral width direction.

Further, as shown in claim 3 and FIG. 4 of the present invention, if the concave side wall of the concave groove 4 is an upper wide groove having a slope from the bottom toward the open end, the molten slag bites. Work efficiency is good because it can be removed as it is. Further, the copper abutment of the present invention is mounted on a lower portion of the conventionally devised copper abutment in the form shown in FIG. 2 and used in combination with a stopper or the like. In this case, it is not necessary to fix the position of the stopper to the position shown in FIG. 2, and it is necessary to stop at least two places so that the copper abutment of the present invention does not fall off the copper abutment covering the head from the feet of the rails 1a and 1b. I just need.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The above-mentioned claim 3 of the present invention is applied to a conventional electroslag welding method from the foot to the head of a rail proposed in Japanese Patent Application Laid-Open No. 2-280982. An example in which the method is applied to an automatic rail welding method will be described with reference to a cross-sectional view of FIG. Further, in the embodiment, an aluminum alloy is used for the material of the abutments 3a and 3b on both sides, the diameter of the through hole is φ10, and the bolts 8a and 8b are M6.
You are using In addition, the stoppers 10a, 10b, 10c, and 10d shown in FIG. 2 are fixed to the front surfaces of the fixed copper abutments 11a, 11b, 11c, and 11d with bolts, respectively, and attached so as to pull up the copper abutment of the present invention. used.

In the figure, a center metal 2 is fixed with copper bolts 11a, 11b, 11 by tightening bolts 6a, 6b with pans.
c, 11d and the rear surfaces of the tail copper abutments 15a, 15b and the rear surfaces of the feet of the rails 1a, 1b are in close contact with each other.
On the tail copper abutments 15a and 15b, when welding finishes the foot of the rail and enters the abdomen continuously, it slides in the direction of the arrow with a driving device to prevent the outflow of molten slag and the like and the shape of the welded portion Are placed on the sliding copper abutments 12a and 12b. Welding along the welding nozzle 16 to the rail shape of the weld trajectory 17
The welding nozzle is raised by detecting the welding current and the welding flux is detected, and a small amount of overfill is formed on the rail head while spraying the required amount of molten flux at each location of the weld. finished. Also, there is no outflow of molten slag and the like during welding, and the stoppers 10a, 10
Only by releasing b, 10c, and 10d, they could be removed without any problem. In addition, the weight was reduced to 9 kg in the embodiment, compared with 14 kg made of copper by using an aluminum alloy for the metal members 3a and 3b on both sides, so that an efficient welding operation could be performed.

[0017]

As described above, according to the present invention, automatic welding of rails with high efficiency and without slag leakage during welding or defective weld bead formation can be performed with light work and low cost.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of a copper alloy according to the present invention.

FIG. 2 is a perspective view showing how to attach a copper abutment according to the present invention.

FIG. 3 is a side view showing an example of the embodiment of the copper equivalent for explaining claim 2 of the present invention.

FIG. 4 is a side view showing an example of an embodiment of the copper equivalent according to the third aspect of the present invention.

FIG. 5 is a front cross-sectional view illustrating an embodiment of the present invention.

[Explanation of symbols]

1a, 1b Rail 2 Center metal 3a, 3b Both sides metal 4 Concave groove 5 Through hole 6a, 6b
Plated bolt 7 Bottom plate 8a, 8b, 8
c, 8d Bolt 9a, 9b Tube 10 Stopper 11a, 11b, 11c, 11d Fixed copper support 12a, 121b Sliding copper support 13a, 13
b Fixed copper contact 14a, 14b, 14c, 14d Pin 15a, 15b Tail contact 16 Non-consumable nozzle 14 Welding locus

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location // B23K 101: 26 (72) Inventor Kenichi Kamine 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation (56) References JP-A-2-280982 (JP, A) JP-A-3-24393 (JP, U) JP-A-1-139995 (JP, U) JP-A-61-177795 (JP JP, U) Japanese Patent Publication No. 44-24249 (JP, B1) Japanese Patent Publication No. 56-4350 (JP, B2) Japanese Utility Model Publication No. 44-14666 (JP, Y1)

Claims (3)

(57) [Scope of request for utility model registration] 1. A copper metal surrounding the periphery of a rail used for automatic welding of a rail which is continuously welded from a foot part to a head part of the rail by an electroslag welding method, the metal part being in contact with the back surface of the rail part being welded. It is divided into three in the direction of the rail axis perpendicular to the line, and a concave groove for stabilizing electroslag welding at the start of welding is provided in the central line in the direction of the welding line, and assembled with the central plate and pins etc. The copper abutment for automatic welding of rails, characterized in that the abutment on both sides to be used is provided with a pair of pipes for passing opposed water flow. 2. The copper abutment for automatic rail welding according to claim 1, wherein the center abutment is divided into two in the rail axis direction. 3. A concave groove provided on a center contact surface, wherein a concave side wall is an upper wide groove having an inclination from a bottom toward an open end.
The copper abutment for automatic rail welding described in.