JPH06344134A - Fire cracker arc welding method and coated backing made of non-magnetic metal for fire cracker arc welding - Google Patents

Abstract

PURPOSE:To improve the forming ratio of excellent bead, and to reduce the pit by using a coated backing made of non-magnetic metal, and executing the fire crack welding while pressing the fire cracker welding material and its arc generating part toward the corner part to be welded of the base metal. CONSTITUTION:A contact point 5 which works as the top of the force based on the gravity is provided on the surfaces of the fire cracker welding material 2 which is provided with a coated backing 3 and divided into two by the line, i.e., Y axis connecting the center 21 of the fire cracker welding material to the intersection 22 of a corner part to be welded formed by the base metal 1 relative to the fire cracker welding material 2. In addition, this coated backing 3 is provided with a contact means 6 which can realize the positional adjustment so as not to act as the top of the force based on the gravity to the base metal 1, or so as to act as a small top even when working as the top of the force based on the gravity. The welding position is the flat position, and the fillet welding is executed. The amount of the stuck spatter to the base metal is small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to steel frames, bridges, shipbuilding,
Non-magnetic metal coating metal for horizontal arc welding (hereinafter horizontal welding) and horizontal arc welding (hereinafter horizontal welding) for fillet welding of machines, equipment, etc. ( Hereinafter, referred to as a coating allowance).

[0002]

2. Description of the Related Art The horizontal welding method for fillet welding of steel frames, bridges, shipbuilding, machinery, equipment, etc. has the characteristic of following the welding line to some extent, and requires the hands of highly skilled workers. Although it is a welding method that can easily perform welding work without depending on, it will occur when actually proceeding with welding work,
In reality, the effect is not as high as expected due to the complex action of deformation of the base metal, deformation of the welding material, and other factors.

[0003] The horizontal welding method disclosed by Hafergut in 1939, as shown in Fig. 5, was to perform fillet welding by mounting a copper coating metal 3, but Distortion occurs in the base material 1 during
The copper coating metal 3, the coated arc welding rod 2, and the base metal 1 are displaced from their predetermined positions, and their cross-sectional shapes are, as shown in FIG. Moreover, the shape of the bead is well balanced, and the state in which the penetration into the base metal is sufficiently ensured is called the “good bead” 30 when it is formed over the entire welding line.
Is secured only in about 20% of the total welding area, which makes it extremely complicated and difficult, and it is inevitable to resort to rework welding that requires advanced technology, and the reliability required for the product. From the point of view, it was difficult to respond to this.

After that, the inventors of the present invention mainly
By adjusting the eccentricity of the welding material and increasing the directivity of the arc, research has been repeated to solve the above situation. Patent Nos. 620, 561 and 63
9,712, Patent 675,297, Patent 95
7,035, Patent 971,851, Patent 97
Although the result was shown as No. 7,131, etc., the result was that the formation rate of good beads was about 80%,
Further improvement is desired, and no other research to be seen has been published.

[0005]

As described above, according to the conventional technique, a horizontal arc welding method is used in which welding work is carried out while mounting a coating metal covering both the base metal and the horizontal welding material. In the above, since the good bead formation rate is not sufficient, the present invention increases the good bead formation rate to 100%, and at the same time, reduces the pits that are likely to occur on the surface of the weld bead. Furthermore, it is an object of the present invention to avoid 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 inventors of the present invention have completed the present invention as a result of intensive studies to solve the above problems. That is, the horizontal arc welding method of the present invention,
As shown in the outline in FIG. 1, in a horizontal welding method in which a welding operation is performed while a covering metal plate 3 that covers both the base material 1 and the horizontal welding material 2 is mounted, a vent hole 4 communicating vertically in the cross-sectional direction is provided. And the horizontal welding material 2 is divided into two by a straight line (Y axis) connecting the center of the horizontal welding material 2 and the intersection of the welded corner formed by the base metal 1. The surface has a contact point 5 that acts as a mass point of force based on gravity, and further does not act on the base material 1 as a mass point of force based on gravity, or even acts as a mass point of force based on gravity. A structure that includes a contact means 6 that can be adjusted in position so as to act as a mass point smaller than the mass point described above, and presses the transverse welding material 2 and its arc generating portion toward the welded corner portion of the base material 1. Horizontal welding material using the coated metal 3 And a lateral location arc welding method of the arc generating unit, wherein the performing Yoko置 welding while pressing the welded corners direction of the base material 1.

Further, the non-magnetic metal coating die of the present invention is used in a horizontal welding method in which a welding operation is performed while the coating metal 3 covering both the base material 1 and the horizontal welding material 2 is mounted. It is a metal-coated metal shell, has a vent hole 4 that communicates vertically in the cross-sectional direction, and with respect to the horizontal welding material 2 described above,
A contact point 5 acting as a mass point of force based on gravity on both surfaces of the horizontal welding material 2 which is divided by a straight line (Y axis) connecting the center thereof and the intersection of the welded corners formed by the base material 1.
Further, even if it does not act on the base material 1 as a mass point of force based on gravity, or even if it acts as a mass point of force based on gravity, it can act as a mass point smaller than the above mass point. Contact means 6 capable of precise adjustment
It is a coating metal deposit 3 provided with.

Further, in the present invention, the contact means 6 which can be adjusted in position as shown in FIG. 2 is a leaf spring 7 having a skirt structure, and the contact means which can be adjusted in position as shown in FIG. 6 as the moving contact means 8, and as shown in FIG. 4, the moving contact means 8 as the contact means 6 which can be adjusted in position is elastically supported by urging the moving contact means 8 by the spring 9 toward the base material 1 side. It is preferable that the roller 10 is a rolling roller.

[0009]

In the present invention, since the coating metal 3 having the vent holes 4 which communicate with each other in the vertical direction of the cross section is used, the gas generated from the arc generating portion is discharged out of the system as the welding work progresses. That is, it is possible to prevent the generation of pits in the welded portion, and it is possible to reduce the spatter adhesion to the surface of the base material 1 to be welded. Further, since the coating metal 3 is made of a non-magnetic metal, it is possible to prevent uneven formation of beads which are easily affected by the magnetic lines of force generated by the action of the electric current used during welding work.

Further, for the horizontal welding material 2, a straight line (Y) connecting the center of the welding material 2 to the intersection of the welded corners formed by the base material 1
On both surfaces of the transverse welding material 2 which is divided into two parts by the axis), and has a contact point 5 acting as a mass point of force based on gravity, and further acts as a mass point of force due to gravity on the base metal 1. No, or even if it acts as a mass point of the force based on gravity, since it comes into contact with the coating metal member 3 provided with the contact means 6 capable of adjusting the position so that it acts as a mass point smaller than the above mass point, Due to the uneven weight of the coating metal 3, the force applied to the welding material 2 does not act in a biased direction, and the bead shape can be improved.

Since the upper surface of the horizontal welding material 2 is covered with the coating metal 3, the leakage of the arc to the outside of the system can be extremely reduced during the progress of the welding work, and the occurrence of eye damage to the operator can be suppressed. it can. In the present invention, the contact means 6 for adjusting the position of the coating metal relative to the base material is a leaf spring 7 having a skirt structure, the contact means 6 is a moving contact means 8, and the contact means 6 The moving contact means 8 as the roller 10 is elastically supported by urging the moving contact means 8 toward the base material 1 side by the spring 9 in all cases. It allows the position to always be set in the center, which greatly improves the formation of good beads 30.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 are perspective views showing an embodiment of the present invention. FIG. 5 is a perspective view showing a conventional example. FIG. 6 is a cross-sectional view showing the formation state of good beads. Example 1 This example was performed by the method shown in FIG. As a base material for arc welding, a rolled steel material for welding structure SM490A specified in JIS G3106 is adopted, and its thickness is 19 mm, width is 160 mm, and length is 1100.
A sample having a size of mm was prepared so that it could be tested by the tensile test method for the front face fillet joint specified in JIS Z3131. When welding, the diameter is 7 mm and the length is 110
SWY11 of the core wire for the covered arc welding rod specified by JIS G3523 of 0 mm is selected, and the effective welding length is 1000.
mm lateral welding material 2 was placed in the fillet welding position and four fillet welds were performed for each sample over a length of 1000 mm each.

In this case, a coating metal 3 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 30 mm.
Are provided so as to communicate with each other vertically in the cross-sectional direction of the coating metal 3, and the center 21 of the horizontal welding material 2 is provided.
And a contact point 5 acting as a mass point of force based on gravity on both surfaces of the horizontal welding material 2 which is divided by a straight line (Y-axis) connecting the welded corner intersection 22 formed by the base material 1. Further, even if it does not act on the base material 1 as a mass point of force based on gravity, or even if it acts as a mass point of force based on gravity, it can act as a smaller mass point than the above mass point. The mass of the coating metal 3 provided with the contact means 6 that can be adjusted in position is 50 k.
g / m, welding position is downward, arc current is 33
Fillet welding was performed with 0A. The chemical composition of the weld metal obtained by the horizontal welding carried out in this way is 0.10% C and 0.2% Si in mass%.
5%, Mn is 1.17%, O is 359 pp
m and N was 26 ppm, and no significant difference was observed in the composition compared with the conventional example. In FIG. 1, 20 is a base and 23 is a horizontal axis.

In this case, the amount of spatter adhering to the base material was extremely small at 1.6 g / m, and the tensile strength of the cross-shaped fillet welded test piece was 539 N / mm ² .
Almost no change from the conventional method, and good bead formation rate is 100
%, Showing very good results. As the pit generation condition, this could not be recognized at all over the length of 1000 mm.

Example 2 This example was carried out by the method shown in FIG. 5m
V-holes 4 having a diameter of m are provided at intervals of 50 mm so as to communicate vertically with each other in the cross-sectional direction of the coating metal 3, and the leaf springs 7, 7 are used as contact means for positional adjustment of the metal. As a result of performing welding in the same manner as in Example 1, the amount of spatter adhering to the base material 1 was extremely small at 1.6 g / m, and the tensile strength of the cross-shaped fillet welded test piece was 541 N / m.
It was m ^2, which was almost the same as that of the conventional method, and the formation rate of good beads was 100%, showing extremely good results. As the pit generation condition, this could not be recognized at all over the length of 1000 mm.

Example 3: 3 This example was carried out by the method shown in FIG. 10
Ventilation holes 4 with a diameter of 30 mm are provided at intervals of 30 mm so as to communicate vertically with each other in the cross-sectional direction of the coating metal 3, and the moving contact means 8 and the spring 9 are used as the contact means for adjusting the position of the metal. The welding was carried out in the same manner as in Example 1 except that the amount of spatter adhering to the base metal was 1.6 g / m, which was extremely small, and the tensile strength of the cross-shaped fillet welded test piece was 545 N. / Mm ^2, which was almost the same as that of the conventional method, and the formation rate of the good beads was 100%, which was an extremely good result. As the pit generation condition, this could not be recognized at all over the length of 1000 mm.

Embodiment 4: This embodiment is carried out by the method shown in FIG. 10
Ventilation holes 4 having a diameter of mm are provided at intervals of 50 mm so as to communicate vertically with each other in the cross-sectional direction of the coating metal 3, and the spring 9 and the roller 1 are used as contact means for adjusting the position of the metal.
As a result of performing welding in the same manner as in Example 1 except that 0 was used, the amount of spatter adhering to the base metal was 1.4 g / m, which was an extremely small amount, and the tensile strength of the cross-shaped fillet welded test piece. The thickness was 540 N / mm ^2, which was almost the same as that of the conventional method, and the formation rate of good beads was 100%, which was a very good result. As the pit generation condition, this could not be recognized at all over the length of 1000 mm.

Example 5: This example was carried out by the method shown in FIG. 10
As a result of performing welding in the same manner as in Example 1 except that ventilation holes 4 having a diameter of 100 mm were provided at intervals of 100 mm so as to communicate with each other in the cross-sectional direction of the coating metal 3, the amount of spatter attached to the base material Is 1.7 g / m, which is a very small amount, and the tensile strength of the cross-shaped fillet welded test piece is 538 N / mm ² , which is almost the same as the conventional method and the good bead formation rate is 1 as well.
It showed 00%, which was a very good result. Also,
As a pit generation situation, this could not be recognized at all over the length of 1000 mm.

Example 6 This example was carried out by the method shown in FIG. 5m
V-holes 4 having a diameter of m are provided at intervals of 50 mm so as to vertically communicate with each other in the cross-sectional direction of the coating metal 3, and as shown in FIG. 4, a spring is used as a contact means for positionally adjusting the coating metal 3. The welding was carried out in the same manner as in Example 1 except that the roller 10 means which was biased toward the base material 1 side in 9 and was elastically supported was used. As a result, the amount of spatter attached to the base material 1 was 1 .2g
/ M, and the tensile strength of the cruciform fillet welded test piece is 542 N / mm ² , which is almost the same as the conventional method, and the formation rate of good beads is 100%, which is extremely good. The result was shown. As the pit generation condition, this could not be recognized at all over the length of 1000 mm.

Example 7: This example was carried out by the method shown in FIG. 10
Ventilation holes 4 having a diameter of mm are provided at intervals of 30 mm so as to communicate vertically with each other in the cross-sectional direction of the coating metal 3, and as shown in FIG.
As a result of welding in the same manner as in Example 1 except that a means for biasing the coating metal 3 to the base metal side by a leaf spring 7 having a skirt structure was used as a contact means for positional adjustment, as a result, spatter was generated in the base metal. The amount adhered to the surface is extremely small, 1.3 g / m, and the tensile strength of the cross-shaped fillet welded specimen is 539 N / m.
It was m ^2, which was almost the same as that of the conventional method, and the formation rate of good beads was 100%, showing extremely good results. As the pit generation condition, this could not be recognized at all over the 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 adhering to the base material was 12.3 g.
The tensile strength of the cross-shaped fillet welded test piece was 545 N / mm ^2, which was almost the same as that of the method of the present invention, but the formation rate of good beads was only 81%.
% And could not show good results. However, as a pit generation situation, this could not be recognized at all over the length of 1000 mm.

Comparative Example: 2 Vents 4 are provided so as to communicate vertically with each other in the cross-sectional direction of the coating metal 3.
As a result of welding in the same manner as in Example 1 except that the coating metal 3, which was not provided, was used, the amount of spatter adhering to the base metal was extremely small at 1.5 g / m, and the cross-shaped fillet was used. The tensile strength of the welded test piece was 541 N / mm ^2, which was almost the same as the method of the present invention, and the good bead formation rate was 10%.
Although it shows 0%, the pit generation status is 100
Four pieces were found over the length of 0 mm, and sufficient results were not obtained.

Comparative Example: 3 Vents 4 are provided so as to communicate with each other in the cross-sectional direction of the coating metal 3.
Welding was carried out in the same manner as in Example 1 except that the coating metal 3 having no groove was used and that the portion in contact with the welding material 2 in this case remained flat. The strength was 541 N / mm ^2, which was almost the same as the method of the present invention, but the amount of spatter adhering to the base material 1 was 9.5 g / m, and the rate of formation of good beads was 86%. And the pit is 1000 mm
In the condition that 6 pieces were found over the length of, the sufficient result was not obtained.

Comparative Example: 4 Vents 4 are provided so as to communicate with each other in the vertical direction in the sectional direction of the coating metal 3.
With the use of the coating metal 3 which is not provided, and in addition to the case where the contact with the welding material 2 in this case has a recess, the leaf spring or the spring system is not adopted for the contact point with the base material 1. As a result of welding in the same manner as in Example 1, the tensile strength of the cruciform fillet welded test piece was 543 N / mm ^2, which was almost the same as the method of the present invention, but the amount of spatter attached to the base material 1 was In addition to the large amount of 8.5 g / m, the formation rate of good beads was only 95%.
Satisfactory results could not be obtained in the condition that 5 pits were found over the length of 1000 mm.

The above results are collectively shown in Table 1.

[0026]

[Table 1]

As described above, according to the present invention, the formation rate of good beads is improved without affecting the welding strength, the amount of spatter is reduced as much as possible, and the generation of pits is suppressed. We have succeeded in making possible fillet welding. In addition, the welder did not complain of any eye damage at all.

[0027]

According to the horizontal arc welding method and the non-magnetic metal coating metal deposit of the present invention, the rate of formation of good beads is improved without affecting the welding strength, and the amount of spatter is minimized. It became possible to implement fillet welding while reducing the number of pits and suppressing the occurrence of pits. In addition, welding workers did not complain of eye damage at all, improving work safety.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing an embodiment of the present invention.

FIG. 4 is a perspective view showing an embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a cross-sectional view showing a generation state of good beads.

[Explanation of symbols]

 1: Base material. 2: Welding material. 3: Cover money. 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 welded corners. 30: Good bead.

Front page continuation (72) Inventor Takao Araki 5-723, Hoya, Matsuyama City, Ehime Prefecture (72) Inventor Tsukasa Hirahara 5 of 644 Takahashi, Imabari City, Ehime Prefecture

Claims (9)

[Claims] 1. A horizontal arc welding method, in which a welding operation is performed while mounting a coating metal that covers both a base metal and a horizontal welding material, and has a vent hole communicating vertically in a cross-sectional direction, and
A force based on gravity is applied to both surfaces of the horizontal welding material divided by a straight line (Y axis) connecting the center of the horizontal welding material and the intersection of the welded corners formed by the base metal. It has a contact point that acts as a mass point, and even if it does not act as a mass point of force based on gravity on the base metal, or even if it acts as a mass point of force based on gravity, it will be a smaller mass point than the above mass point. Using a non-magnetic metal coating metal plate equipped with contact means that can be adjusted in position so that it can be actuated, the horizontal welding material and its arc generating part are pressed horizontally toward the welded corner of the base metal. A horizontal arc welding method characterized by performing welding. 2. The horizontal arc welding method according to claim 1, wherein the horizontal arc welding is downward fillet welding. 3. The horizontal arc welding method according to claim 1, wherein the contact means for adjusting the position is a leaf spring having a skirt structure. 4. The horizontal arc welding method according to claim 1, wherein the contact means for adjusting the position is a moving contact means. 5. The moving contact means as a contact means for adjusting the position is a roller biased toward the base material by a spring and elastically supported. Horizontal arc welding method. 6. A non-magnetic metal coating metal for use in a horizontal arc welding method in which welding is performed while mounting a metal coating that covers both the base metal and the horizontal welding material, and the metal coating metal is used in a vertical direction in the cross section. The horizontal welding material has a communicating vent hole and is bisected by a straight line (Y axis) connecting the center of the horizontal welding material and the intersection of the welded corners formed by the base metal. On both surfaces, there is a contact point that acts as a mass point of force based on gravity, and even if it does not act as a mass point of force based on gravity on the base material, or if it acts as a mass point of force based on gravity, A structure is provided that includes contact means capable of positional adjustment that can act as a mass point smaller than the mass point described above, and presses the transverse welding material and its arc generating portion toward the welded corner of the base metal. Characteristic for horizontal arc welding Non-magnetic metal coating metal. 7. The nonmagnetic metal coating metal plate for horizontal arc welding according to claim 6, wherein the contact means which can be adjusted in position is a leaf spring having a skirt structure. 8. The non-magnetic metal coating metal plate for horizontal arc welding according to claim 6, wherein the contact means that can be adjusted in position is a moving contact means. 9. The moving contact means as a contact means for adjusting the position is a roller urged toward the base material side by a spring and elastically supported. Non-magnetic metal coating metal for horizontal arc welding.