JP3353393B2 - Horizontal arc welding method and non-magnetic metal coating for horizontal arc welding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to steel frames, bridges, shipbuilding,
Nonmagnetic metal coating metal for horizontal arc welding (hereinafter referred to as horizontal welding) and horizontal arc welding (hereinafter referred to as horizontal welding) for fillet welding of machines and equipment. Hereinafter, this will be referred to as a coating allowance).

[0002]

2. Description of the Related Art A horizontal welding method for fillet welding of steel frames, bridges, shipbuilding, machinery, equipment, etc. has a characteristic of following a welding line to a certain degree accurately, and can be performed by highly skilled workers. This is a welding method that can easily perform a welding operation without depending on the welding method. However, the composite action caused by the deformation of the base material, the deformation of the welding material, and other causes that occur when actually performing the welding work is surprisingly large, and the effect is not as high as expected. That is the fact.

In the horizontal welding method disclosed by Hafergut in 1939, as shown in FIG. 6, a fillet welding was performed by mounting a copper covering metal 3, but the welding operation was advanced. While the base material 1 is distorted,
The copper coating metal 3, the coating arc welding material 2, and the base metal 1 are displaced from predetermined positions, and the cross-sectional shapes thereof are evenly arranged on the left and right of the corner of the base metal 1 as shown in FIG. In addition, the "good bead" 3 is called when the shape of the bead is formed in a well-balanced manner and the penetration into the base metal is sufficiently ensured when the bead is formed over the entire welding line.
0 is secured only in an area of about 20% of the entire welding area,
For this reason, it has been necessary to resort to rework welding, which is extremely complicated and difficult, and also requires advanced technology, and has been driven to a state where it is difficult to respond to this in view of the reliability required for products.

After that, the present inventors, mainly,
By adjusting the eccentricity of the welding material and increasing the directivity of the arc, studies for solving the above situation have been repeated, and Japanese Patent No. 620,561 and Patent No. 63 have been studied.
No. 9,712, Patent No. 675,297, Patent No. 95
No. 7,035, Patent No. 971,851, Patent No. 97
No. 7,131 etc., although the results were shown, the results also showed that the formation rate of good beads was about 80%,
Further improvements are desired, and no other studies have been published.

[0005]

As described above, according to the prior art, a horizontal arc welding method in which a welding operation is performed while mounting a covering metal covering both a base material and a horizontal welding material. In the present invention, since the formation rate of good beads is not sufficient, the present invention increases the formation rate of good beads to 100%, and the risk of eye damage due to arc leakage during welding work. And to prevent spatter from adhering to the welding area.

[0006]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have accomplished the present invention. That is, the horizontal arc welding method of the present invention,
As schematically shown in FIG. 1, in the horizontal welding method in which the welding operation is performed while attaching the coating metal 3 covering both the base metal 1 and the horizontal welding material 2, the coating metal 3 has a melting temperature of 10 mm.
A coating made of a nonmagnetic metal having a thermal conductivity of not less than 22 ° C. and a thermal conductivity of not less than 0.448 cal / cm · sec · ° C. at 20 ° C. and having a vent hole 4 communicating vertically in the cross-sectional direction thereof. The horizontal welding which is the metal 3 and is bisected by a straight line (Y axis) connecting the center 21 of the horizontal welding material 2 and the intersection 22 to be welded formed by the base material 1. On both surfaces of the material 2, there are contact points 5 acting as mass points of force based on gravity, and further, they do not act on the base material 1 as mass points of force based on gravity, or as mass points of force based on gravity. Even if it acts, it is provided with contact means 6 that can be adjusted in position so that it can act as a mass point smaller than the mass point described above, and the horizontal welding material 2 and its arc generating part are directed to the corners of the base material 1 to be welded. Structure to press As shown in FIG. 2, one end of the coating metal 3 is embedded in the slag layer 26 generated at the start of the welding operation using the coating metal 3 made of a non-magnetic metal, or Surface 27 of slag layer 26
The welding material 2 is kept very close to
A horizontal arc welding method characterized in that horizontal arc welding is performed while pressing the arc generating portion in the direction of the corner to be welded of the base material 1.

Further, as shown in FIG. 1, the non-metallic coating metal for horizontal arc welding of the present invention comprises a non-magnetic metal metal coating metal coating 3 covering both the base metal 1 and the horizontal metal welding material 2. The coating metal 3 used in the horizontal welding method in which welding is performed while attaching the metal is not less than 1022 ° C.
0.448 cal / cm · sec.
・ Because it is made of non-magnetic metal whose temperature is higher than ℃,
It is a covering metal having a vent hole 4 communicating vertically in the cross-sectional direction thereof.
And a contact point 5 acting as a mass point of force based on gravity on both surfaces of the horizontal welding material 2 divided by a straight line (Y axis) connecting the welded corner intersection 22 formed by the base material 1 and Further, the base material 1 does not act as a mass point of a force based on gravity, or even if it acts as a mass point of a force based on gravity, it can act as a mass point smaller than the above mass point. This is the covering metal 3 provided with the contact means 6 that can be adjusted. Further, according to the present invention, as shown in FIG.
As a leaf spring 7 having a skirt structure, as shown in FIG. 4, as a moving contact means 8 as a contact means 6 for positional adjustment, and as a contact means as shown in FIG. It is preferable that the movable contact means 8 serving as 6 is a roller 10 which is urged toward the base material 1 by a spring 9 so as to be elastically supported. Further, the coating metal 3 of the present invention has at least two points in contact with the horizontal welding material 2 as its cross-sectional shape, and a straight line 24 connecting each of the contact points 5 and the center 21 of the horizontal welding material and the base 20 have It is preferable that the coating metal 3 is formed by adjusting the angle θ formed between the axis 25 parallel to the horizontal axis 23 and the axis 25 to be 0 ° to 45 °.

[0008]

According to the present invention, as shown in FIG. 2, one end of the covering metal 3 is buried inside the slag layer 26 generated at the time of welding, or the other end is welded. Slag layer 2 generated with the progress of
Since the welding operation is performed while keeping the surface 27 extremely close to the surface 27 of the base material 6, almost no spatter adheres to the surface of the base material 1 to be welded. Also,
Since the covering metal 3 is made of a non-magnetic metal, it is possible to prevent the formation of beats which are easily affected by the lines of magnetic force generated by the action of the current used during the welding operation.

[0009] Further, the coating metal 3 used in the welding operation
Is made of a non-magnetic metal having a melting temperature of not less than 1022 ° C. and a heat conductivity of not less than 0.448 cal / cm · sec · ° C. at 20 ° C. When proceeding, the danger that the coating metal 3 is melted by the heat generated around the coating metal 3 is reduced, and the heat dissipating action of the heat easily accumulated in the coating metal 3 is promoted, so that the coating metal 3 is more stable. The welding operation can proceed in the state where the welding is performed.

According to the present invention, since the coating metal 3 used in the welding operation is formed as the coating metal 3 having the ventilation hole 4 communicating vertically in the sectional direction, the coating metal 3 is generated from the arc generating portion with the progress of the welding operation. It is possible to promote the discharge of incoming gas out of the system, and as a result, pits can be prevented from being generated in the welded portion.

Further, the surface of the horizontal welding material 2 is bisected by a straight line (Y axis) connecting the center 21 of the horizontal welding material 2 and the intersection 22 of the base to be welded formed by the base material 1. Above, a contact point 5 acting as a mass point of force based on gravity
And a position that does not act on the base material 1 as a mass point of force based on gravity, or that can act as a mass point smaller than the above mass point even if it acts as a mass point of force based on gravity. Contact means 6 which can be adjusted
Since the coating metal 3 provided with the abutment is brought into contact, the force applied to the welding material 2 does not act in a biased direction, and the bead shape can be made good.

Since the upper surface of the horizontal welding material 2 is covered with the covering metal 3, the leakage of the welding arc outside the system during the welding operation is extremely reduced, and the eye trouble of the operator can be suppressed. In the present invention, as shown in FIG. 3, the contact means 6 for adjusting the position of the covering metal 3 with respect to the base material 1 is a leaf spring 7 having a skirt structure. As shown in FIG. Means 6 as moving contact means 8;
As shown in FIG. 5, the moving contact means 8 serving as the contact means 6 is a roller 10 which is urged toward the base material 1 by a spring 9 and elastically supported. This makes it possible to always set the position of the coating metal 3 on the upper surface of the material 2 at the center, thereby greatly improving the formation of the good bead 30.

According to the present invention, as shown in FIG. 1, at least two or more points of the cross-sectional shape are brought into contact with the horizontal welding material 2, and each of the contact points 5 and the center 21 of the horizontal welding material 2 are formed.
Is formed by adjusting the angle θ formed between the straight line 24 connecting the base and the axis 25 parallel to the horizontal axis 23 of the base 20 to be 0 ° to 45 °. Thus, the formation rate of good beads is increased, and the amount of spatter is reduced.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing the configuration of each part prior to the implementation of the present invention. FIG. 2 is a perspective view showing a configuration state of each part during a welding operation according to the embodiment of the present invention. 3 to 5 are perspective views of respective parts showing another embodiment of the present invention. FIG. 6 is a perspective view showing a conventional example. FIG. 7 is a cross-sectional view showing a good bead forming state.

Embodiment 1 This embodiment is performed by the method shown in FIG. As the base material 1 for arc welding, a rolled steel material for welding structure SM490A specified in JIS G3106 is adopted, the thickness is 19 mm, the width is 160 mm, and the length is 110 mm.
A sample of 0 mm was prepared so that it could be tested by the tensile test method of the front fillet joint specified in JIS Z3131. For welding work, the diameter is 7mm and the length is 11
SWY11 of the coated arc welding rod core wire specified in JIS G3523 of 00 mm is selected, and the effective welding length is 100.
Place 0 mm horizontal welding material 2 at the fillet welding position,
Four fillet welds were performed on the sample over a length of 1000 mm each.

In this case, a coating metal 2 made of tough pitch copper of C1100 specified in JIS H3250 is used, and a ventilation hole 4 having a diameter of 5 mm is formed in the metal coating 3 by 30 mm.
Are provided so as to be vertically connected in the cross-sectional direction of the coating metal 3 at an interval of
And a contact which acts as a mass point of force based on gravity on both surfaces of the horizontal welding material divided by a straight line (Y-axis) connecting the welded corner intersection point 22 formed by the base material 1 and However, the base material does not act as a mass point of force based on gravity, or even if it acts as a mass point of force based on gravity, a positional adjustment that can be made to act as a mass point smaller than the above mass point can be taken. Fillet welding was performed with the mass of the coating metal provided with the contact means 6 set to 50 Kg / m, the welding posture set downward, and the arc current set to 330 A.

In this case, a straight line 24 connecting the contact 5 of the coating metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 has an angle of 0 ° drawn between the straight line 24 and the axis 25. Using gold 3, the coating metal 3 was disposed in contact with the surface 27 of the slag layer 26. The chemical components of the weld metal obtained by the horizontal welding performed in this manner include C
Is 0.10%, Si is 0.25%, Mn is 1.17%, 0 is 359 ppm, and N is 26%.
ppm, and no remarkable difference was found in the composition as compared with the conventional example.

Further, the amount of spatter adhering to the base material 1 is extremely small at 1.2 g / m, and the tensile strength of the cruciform fillet welded test piece is 543 N / mm ² .
There is almost no change from the conventional method, and the formation rate of good beads 30 is 1
00%, indicating a very good result. Also,
The pit formation was not recognized at all over a length of 1000 mm.

Example 2 An angle drawn by a straight line 24 connecting the contact point 5 of the coating metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 with the axis 25 is 30 °, and the coating is performed. The metal 3 is immersed in 1 mm below the surface 27 of the slag layer 26, and the air hole 4 having a diameter of 5 mm is provided.
Were welded in the same manner as in Example 1 except that the metal was provided at intervals of 50 mm. As a result, the amount of spatter attached to the base material 1 was 0.2 g.
/ M, and the tensile strength of the cruciform fillet welded specimen is 535 N / mm ² , which is almost the same as the conventional method, and the bead 30 formation rate is 100%, which is very good. Results were shown. In addition, the pits were not formed at all over a length of 1000 mm.

Example 3 A straight line 24 connecting the contact point 5 of the coating abutment 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 is drawn at an angle of 45 ° between an axis 25 and the coating. The metal 3 was immersed 1 mm below the surface 27 of the slag layer 26 and welded in the same manner as in Example 1 except that ventilation holes having a diameter of 10 mm were provided at intervals of 30 mm. 0.3g attached to
/ M, and the tensile strength of the cruciform fillet welded test piece is 540 N / mm ² , which is almost the same as the conventional method, and the bead 30 formation rate is 100%, which is extremely good. Results were shown. In addition, the pits were not formed at all over a length of 1000 mm.

Example 4 The covering metal 3 is made of copper, and a straight line 24 connecting the contact point 5 of the covering metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 is between the axis 25. In the same manner as in Example 1 except that the coating metal 3 was immersed and disposed 1 mm below the surface 27 of the slag layer 26 and ventilation holes 4 having a diameter of 10 mm were provided at intervals of 50 mm. As a result, the amount of spatter adhering to the base material 1 was as small as 0.1 g / m, and the tensile strength of the cruciform fillet welded specimen was 530 N / m.
A mm ^2, the conventional method with almost no change, also show a 100% rate of formation of good bead 30 showed very good results. The pit generation status is 1000
This was not observed at all over the length of mm.

EXAMPLE 5 The covering metal is made of copper, and a straight line 24 connecting the contact point of the covering metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 is formed between an axis 25. The drawing angle θ was 30 °, the coating metal 3 was immersed 2 mm below the surface 27 of the slag layer 26, and the ventilation holes 4 having a diameter of 10 mm were provided at intervals of 100 mm in the same manner as in Example 1. As a result, the amount of spatter adhering to the base material 1 was as small as 0.4 g / m, and the tensile strength of the cruciform fillet welded test piece was 545 N
/ Mm ² , which is almost the same as that of the conventional method, and the rate of formation of good beads is also 100%, which is an extremely good result. Also, the pit generation situation is 1000m
This was not observed at all over a length of m.

Example 6 The covering metal is made of copper, and a straight line 24 connecting the contact point 5 of the covering metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 is formed between an axis 25. The drawing angle θ is 45 °, the coating metal 3 is immersed in 1 mm below the surface 27 of the slag layer 26, and the coating metal 3 in which ventilation holes 4 having a diameter of 5 mm are provided at 50 mm intervals is shown in FIG. Example 1 except that a roller 10 was urged toward the base material 1 by a spring 9 and resiliently supported as a contact means for adjusting the position as shown in FIG.
As a result of welding in the same manner as above, the amount of spatter adhering to the base material 1 was as extremely small as 0.2 g / m, and the tensile strength of the cruciform fillet welded test piece was 538 N / mm ² . There was almost no change from the conventional method, and the formation rate of the good bead 30 was also 100%, showing an extremely good result.
In addition, the pits were not formed at all over a length of 1000 mm.

EXAMPLE 7 The covering metal is made of copper, and a straight line 24 connecting the contact 5 of the covering metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 is formed between the axis 25 and the straight line 24. The drawing angle θ is 45 °, the coating metal 3 is immersed 2 mm below the surface 27 of the slag layer 26, and the coating metal 3 in which ventilation holes 4 having a diameter of 10 mm are provided at intervals of 30 mm is shown in FIG. As shown in the drawing, as a result of welding in the same manner as in Example 1 except that a means for urging the base material 1 side by a leaf spring 7 having a skirt structure was used as a contact means for adjusting the position, spatter was formed on the base material. The amount attached to No. 1 showed a good result of 0 g / m, and the tensile strength of the cruciform fillet welded test piece was 542 N / mm ^2, which was almost the same as the conventional method, and the formation rate of the good bead 30. Also showed 100%, which was an extremely good result. In addition, the pits were not formed at all over a length of 1000 mm.

Comparative Example 1 As a result of welding in the same manner as in Example 1 except that the coating metal 3 was not used, the amount of spatter attached to the base material 1 was 12.3.
g / m, and the tensile strength of the cruciform fillet welded test piece was 538 N / mm ^2, which was almost the same as the method of the present invention, but the formation rate of the good bead 30 was only 81%. Only good results could not be shown.

COMPARATIVE EXAMPLE 2 The coating metal 3 was placed 2 mm upward from the surface 27 of the slag layer 26.
As a result of welding in the same manner as in Example 1 except that it was arranged apart, the amount of spatter attached to the base material 1 was as large as 9.6 g / m, and the tensile strength of the cruciform fillet welded test piece Was 542 N / mm ^2, which was almost the same as the method of the present invention, and the formation rate of good beads 30 was only 88%. In this case, four pits were generated for a length of 1000 mm.

COMPARATIVE EXAMPLE: 3 The covering metal 3 was made of copper and was placed 2 mm upward from the surface 27 of the slag layer 26, and the contact 5 of the covering metal 3 in contact with the horizontal welding material 2 and the horizontal welding material 2 As a result of welding in the same manner as in Example 1 except that the angle θ drawn by the straight line 24 connecting the center 21 with the axis 25 was 30 °, the tensile strength of the cruciform fillet welded test piece was 545 N / Mm ^2, which was almost the same as the method of the present invention,
The amount attached to was as large as 12.1 g / m,
The formation rate of good beads 30 also showed only 85%.
In this case, six pits were generated for a length of 1000 mm.

COMPARATIVE EXAMPLE 4 The covering metal 3 was placed 2 mm upward from the surface 27 of the slag layer 26.
An angle θ drawn between the contact point 5 of the coating metal 3 in contact with the horizontal welding material 2 and the center 21 of the horizontal welding material 2 with the axis 25 is set to 75 °, and the angle θ is set to 75 °. In this case, although a recess is provided at a position in contact with the welding material 2, a leaf spring 7 or a spring 9 is provided at the contact point 5 with the base material 1.
As a result of welding in the same manner as in Example 1 except that the method was not adopted, the tensile strength of the cruciform fillet welded test piece was 5
Although it was 35 N / mm ^2, which was almost the same as the method of the present invention, the amount of spatter attached to the base material 1 was 13.5 g.
/ M, and the formation rate of good beads 30 was only 90%, and sufficient results could not be obtained. In this case, five pits were confirmed for a length of 1000 mm.

COMPARATIVE EXAMPLE 5 Coating metal 3 made of aluminum bronze was placed 1 mm upward from the surface 27 of the slag layer 26, and the contact 5 of the coating metal 3 in contact with the horizontal welding material 2 and horizontal welding were performed. The welding operation was performed in the same manner as in Example 1 except that the angle θ drawn between the straight line 24 connecting the center 21 of the material 2 and the axis 25 was 45 °. Part of the aluminum bronze melted into the alloy, and satisfactory results were not obtained.

COMPARATIVE EXAMPLE 6 The first embodiment is the same as the first embodiment except that the coating metal 3 is made of stainless steel, and the coating metal 3 is arranged so as not to be separated from the surface 27 of the slag layer 26 where the coating metal 3 is formed. The welding operation was performed in the same manner as in the above, however, stainless steel partially dissolved in the weld metal during the welding operation, and satisfactory results were not obtained.

The above results are summarized and shown in Table 1.

[0032]

[Table 1]

As described above, when the present invention is practiced, the formation rate of the good bead 30 is improved without affecting the welding strength, and the amount of spatters generated is reduced as much as possible. We succeeded in avoiding generation. In addition, the welding operator did not complain of any eye problems.

[0034]

According to the horizontal arc welding method of the present invention and the coating metal made of a non-magnetic metal, the formation rate of good beads can be improved without affecting the welding strength, and the amount of spatter adhered can be reduced. Not only has it been reduced as much as possible, but it has also become possible to perform fillet welding while suppressing the occurrence of pits. In addition, the welding operator never complained of eye problems, and the work safety was improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration state of each unit prior to the embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration state of each part during a welding operation according to the embodiment of the present invention.

FIG. 3 is a perspective view of each part showing another embodiment of the present invention.

FIG. 4 is a perspective view of each part showing another embodiment of the present invention.

FIG. 5 is a perspective view of each part showing another embodiment of the present invention.

FIG. 6 is a perspective view showing a conventional example.

FIG. 7 is a cross-sectional view showing a state in which good beads are generated.

[Explanation of symbols]

1: Base material. 2: welding material. 3: Covering gold. 4: Vent. 5: Contact point. 6: Contact means. 7: Leaf spring. 8: Moving contact means. 9: Spring. 10: Roller. 20: Foundation. 21: Center. 22: intersection of the corner to be welded. 23: horizontal axis. 24: straight line. 25: axis. 26: Slag layer. 27: Surface. 30: Good bead.

Continuation of the front page (72) Inventor Takao Araki 5-7-23, Shokanya, Matsuyama-shi, Ehime Prefecture (JP, a) JP flat 7-164148 (JP, a) JP flat 7-1124 (JP, a) JP flat 6-198436 (JP, a) (58 ) investigated the field (Int.Cl. ⁷ , DB name) B23K 9/02 B23K 37/06

Claims (12)

(57) [Claims] 1. A horizontal arc welding method in which a welding operation is performed while mounting a coating metal covering both a base metal and a horizontal welding material, wherein the coating metal has a melting temperature of 1022 ° C. or higher and a temperature of 20 ° C. Thermal conductivity at 0.448 cal / c
A coating metal made of a non-magnetic metal having a temperature of at least m · sec · ° C. and provided with a ventilation hole communicating vertically in the cross-sectional direction thereof, and having a center with respect to the horizontal welding material. And a contact point acting as a mass point of force based on gravity on both surfaces of the horizontal welding material divided by a straight line (Y-axis) connecting the intersection of the corner to be welded formed by the base material. Contact means that does not act on a material as a mass point of force based on gravity, or that can be adjusted as a mass point smaller than the above mass point even if it acts as a mass point of force based on gravity. Using a non-magnetic metal coating metal provided with a state in which one end of the coating metal is buried inside the slag layer generated at the start of the welding operation, or one end of the coating metal. Slag layer table above Very together keep a state of being close, Yoko置 weld material and the lateral location arc welding method and performing Yoko置 welding while the arc generating unit is pressed against the welded corners intersection direction of the base material. 2. A coating metal made of a non-magnetic metal further contacts at least two points of the horizontal welding material as a cross-sectional shape thereof, and a straight line connecting each contact and the center point of the horizontal welding material is formed. 2. The non-magnetic metal coating pad molded so that an angle [theta] formed between the base and an axis parallel to the horizontal axis is 0 [deg.] To 45 [deg.]. Horizontal arc welding method. 3. The horizontal arc welding method according to claim 1, wherein the horizontal arc welding is downward fillet welding. Contact means capable of performing 4. A positional adjustment, the horizontal location arc welding method according to any one of claims 1 to 3, characterized in that a leaf spring of the skirt structure. 5. The horizontal arc welding method according to claim 1, wherein the contact means capable of adjusting the position is a moving contact means. 6. The moving contact means as a contact means capable of adjusting the position is a roller which is urged toward a base material side by a spring and is resiliently supported. Horizontal arc welding method. 7. A non-magnetic metal coating metal used in a horizontal arc welding method for performing a welding operation while mounting a coating metal covering both a base metal and a horizontal welding material, wherein the coating metal is used. The melting temperature is set to 1022 ° C. or higher, and the thermal conductivity at 20 ° C. is set to 0.448 cal / cm · sec · ° C.
A coating metal made from the above non-magnetic metal,
In addition, with respect to the horizontal welding material, gravity is applied on both surfaces of the horizontal welding material, which is bisected by a straight line (Y axis) connecting the center of the horizontal welding material and the intersection of the corner to be welded formed by the base material. It has a contact that acts as a force mass point, and does not act on the base material as a gravity-based force mass point, or is smaller than the above-mentioned mass point even if it acts as a gravity-based force mass point. Horizontal arc welding characterized by comprising contact means for adjusting the position which can be used as a mass point, and having a structure in which a horizontal welding material and an arc generating portion thereof are pressed in a direction of an intersection of a corner to be welded of a base material. For non-magnetic metal coating. 8. A coating metal made of a non-magnetic metal makes contact with at least two points of the horizontal welding material as a cross-sectional shape, and a straight line connecting each contact point and the center of the horizontal welding material is formed on the base. Angle θ drawn between the axis parallel to the horizontal axis and 0 °
8. The non-magnetic metal coating cover according to claim 7, wherein the coating is formed by adjusting the angle to 45 [deg.]. 9. The non-metallic coating cover for horizontal arc welding according to claim 7, wherein the contact means capable of adjusting the position is a leaf spring having a skirt structure. 10. The non-metallic coating cover for horizontal arc welding according to claim 7, wherein the contact means capable of adjusting the position is a moving contact means. 11. The moving contact means as a contact means capable of adjusting the position is a roller which is urged toward a base material side by a spring and is resiliently supported. 8. A coating metal made of a nonmagnetic metal for horizontal arc welding according to item 8. 12. The non-magnetic metal is red brass, oxygen-free copper, or to 請 Motomeko 7 not you being a tough pitch copper horizontal location arc welding non-magnetic metal coating according to any one of the 11 This money.