CN115519221A - Welding process method for T-shaped joint smooth welding seam - Google Patents
Welding process method for T-shaped joint smooth welding seam Download PDFInfo
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- CN115519221A CN115519221A CN202211146945.5A CN202211146945A CN115519221A CN 115519221 A CN115519221 A CN 115519221A CN 202211146945 A CN202211146945 A CN 202211146945A CN 115519221 A CN115519221 A CN 115519221A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
The invention discloses a welding process method of a T-shaped joint smooth welding seam, wherein the T-shaped joint welding seam at least comprises a section of transverse welding seam and a section of vertical welding seam, the transverse welding seam is welded firstly, then the vertical welding seam is welded, and the vertical welding seam covers the tail part of the transverse welding seam for welding; adjusting the working inclination angle of a welding gun and the size of a welding arc column to obtain an arc pit for arc ending at the tail part of a transverse welding line during welding, wherein the arc pit is formed into an approximately elliptical shape; the size of a crater of the tail arc-closing of the transverse welding seam is consistent with the width of the welding seam of the vertical welding seam; the depth of an arc pit of the arc closing of the transverse welding seam is at most 2/3 of the thickness of the welding seam, the approximately elliptical arc pit formed by the transverse welding seam is filled and sealed during vertical welding seam welding, the vertical welding seam covers the arc pit of the arc closing of the transverse welding seam and is fused, and liquid metal is not insufficient or accumulated during welding at a joint, so that the smooth and attractive formation of the welding seam at the T-shaped joint is ensured, and the strength and the compactness are consistent; the whole welding process method has wide application range and has important significance for improving the welding quality.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a welding process method of T-shaped connected smooth welding seams.
Background
In the T-shaped welding process, because the size and the depth of the arc crater formed by the arc closing of the transverse welding seam are not matched with those of the vertical welding seam, the joint of the transverse welding seam and the vertical welding seam is easy to generate the defects of concave, convex, unfused or disjointed and the like. The T-shaped joint welding line at least comprises a section of transverse welding line and a section of vertical welding line, the transverse welding line is welded firstly, then the vertical welding line is welded, and the vertical welding line covers the tail part of the transverse welding line for welding; during welding, the arc crater of the tail arc-closing of the transverse welding seam is formed to approximate the shape and size of an elliptical arc crater, and the size of the arc crater of the tail arc-closing of the transverse welding seam is consistent with the width of the welding seam of the vertical welding seam; the depth of the arc pit of the arc closing of the transverse welding line is at most 2/3 of the thickness of the welding line, the approximately elliptical arc pit formed by the transverse welding line is filled and sealed during vertical welding, the arc pit of the arc closing of the transverse welding line is covered by the vertical welding line, namely, the arc pit formed by the arc closing of the transverse welding line is completely covered by the molten pool of the vertical welding line and is subjected to cross welding when the arc pit of the transverse welding line is sealed by the vertical welding line, and the welding liquid metal at the joint does not generate deficiency or accumulation, so that the smooth and attractive forming of the welding line at the T-shaped joint is ensured, and the strength and the compactness are consistent.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a welding process method of a T-shaped joint smooth welding seam. The T-shaped joint welding line at least comprises a section of transverse welding line and a section of vertical welding line, the transverse welding line is welded firstly, then the vertical welding line is welded, and the vertical welding line covers the tail part of the transverse welding line for welding; the method comprises the steps of obtaining the width and the thickness of a welding seam according to the thickness of a base material when a transverse welding seam is closed, adjusting the inclination angle of a welding gun and the size of a welding arc column to obtain an approximately elliptical arc pit when the transverse welding seam is closed, wherein the size of the major axis of the approximately elliptical arc pit is consistent with that of a vertical welding seam, the size of the minor axis is consistent with that of the transverse welding seam, the depth of the arc pit formed by closing the tail part of the transverse welding seam is reserved at most 2/3 of the thickness of the welding seam, filling and sealing the approximately elliptical arc pit formed by the transverse welding seam when the vertical welding seam is welded, covering the arc pit of the closed arc of the transverse welding seam by the vertical welding seam is realized, namely, when the arc pit of the transverse welding seam is covered by the vertical welding seam, the arc pit of the transverse welding seam is completely covered by the vertical welding seam, and the cross welding is obtained, and the welding liquid metal at the welding seam at the joint of the T shape is ensured to be smooth and beautiful, and the strength and the compactness are consistent.
The invention discloses a welding process method of a T-shaped joint smooth welding seam, aiming at the problems that an arc pit formed by arc closing of a transverse welding seam is not matched with a vertical welding seam, and the joint is easy to lay, accumulate, not fuse, disjointed and the like during the welding of the T-shaped joint welding seam, the inclination angle, the arc column size and the retention time of a welding gun are adjusted when the arc closing of the tail part of the transverse welding seam is carried out, the major axis of the arc pit which is formed by the arc closing of the transverse welding seam is consistent with the width of the vertical welding seam, the minor axis is consistent with the width of the transverse welding seam, the welding seam formed at the joint of the T-shaped joint welding seam is smooth and beautiful, and the strength and the compactness are consistent.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
the welding process method of the T-shaped butt smooth welding seam at least comprises the following steps:
step 1: in the process of transverse welding seam welding, welding parameters are adjusted according to the diameter of a welding material and the dry elongation of the fixed welding material to weld the welding seam;
step 2: when the transverse welding seam is finished, the transverse welding seam is arched to form an approximately elliptical arc pit, and the depth of the formed approximately elliptical arc pit is 2/3 of the thickness of the welding seam; in the process of arc closing of the transverse welding seam, the stay point is slightly deviated to one side of the vertical welding seam, so that the vertical welding seam is fully filled and covered;
and step 3: welding process of vertical welding seam based on transverse welding seam arc pit
3.1, the width of the vertical welding seam formed by welding is consistent with the major axis of the approximate elliptical arc pit formed by arc closing of the transverse welding seam, and the width of the molten pool formed into the approximate ellipse is approximately consistent with the major axis of the approximate elliptical arc pit formed by arc closing of the welding seam by adjusting the welding process parameters;
and 3.2, at the joint of the transverse welding seam and the vertical welding seam, prolonging the stay time of the arc-closing point of the vertical welding seam so as to obtain a welding pool for remelting, filling, sealing and the like the arc pit formed by arc closing of the transverse welding seam.
And 4, step 4: forming process of arc pit for tail arc-closing of transverse welding seam
Step 4.1, the size of a crater of the transverse welding seam arc closing is determined by a welding gun working inclination angle and a welding arc column; the working inclination angle of the welding gun is dynamically balanced according to the electric arc blowing force and the welding pool, the working inclination angle of the welding gun is determined to be 70-85 degrees, and the welding arc column is adjusted to ensure that the major axis of an approximate elliptical arc pit formed by the arc closing of the tail part of a transverse welding seam formed by projection of the welding arc column is consistent with the width of a vertical welding seam and the minor axis is consistent with the width of the transverse welding seam;
and 4.2, adjusting the residence time of the welding gun in the arc pit to obtain about 1/3 of the depth of the liquid metal filled arc pit, and remelting, filling and sealing the 2/3 of the reserved depth by a vertical welding line.
In the welding process from the step 1 to the step 4, the intersection point of the T-shaped connecting welding lines is the intersection point of the central lines of the transverse welding line and the vertical welding line; the material quality, size and dry elongation of the welding material are kept unchanged, other auxiliary welding facilities are kept unchanged, and the welding work inclination angle range of the welding gun is 70-85 degrees.
And in the step 2, the size of the approximate elliptical arc pit is the projection of the size of the arc column and the welding work inclination angle of the welding gun.
The sizes of the welding arc columns in the step 3 are uniformly adjusted, and the stability of the arc columns is consistent; the arc-closing stopping point of the transverse welding seam takes the intersection point of the central lines of the transverse welding seam and the vertical welding seam as a datum point.
The invention has the characteristics and beneficial effects that:
1. the size and the depth of an arc pit formed by the arc closing of the transverse welding seam are controlled, the welding process parameters and the track of the vertical welding seam are determined based on the arc pit form of the transverse welding seam, the smooth transition of the joint of the transverse welding seam and the vertical welding seam of the T-shaped joint is ensured, the welding seam is smooth and attractive, and the strength and the compactness are consistent.
2. The arc crater formed by arc closing of the transverse welding seam is controlled by the working inclination angle of the welding gun and the size of the welding arc column, so that the process of receiving the arc by welding is quantifiable, and the quality controllability of the welding seam at the transverse and vertical welding joints of the T-shaped joint welding seam is improved.
Drawings
FIG. 1 is a schematic view of a T-shaped joint structure consisting of a section of a transverse weld and a section of a vertical weld.
FIG. 2 (a) is a schematic view of a crater formed by the tail portion arcing at the end of the transverse seam welding;
FIG. 2 (b) is a schematic view of the arc crater of the trailing arc of the transverse weld being closed by the vertical weld.
FIG. 2 (c) is a schematic view showing a crater shape formed by a transverse seam welding receiving arc.
FIG. 3 is a schematic view of the arc crater depth reservation for transverse weld arc ending.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The welding process method of the T-shaped butt smooth welding seam is characterized in that the arc crater of the arc closing at the tail part of the transverse welding seam is consistent with the width of the welding seam of the vertical welding seam, specifically, the major axis of the approximate elliptical arc crater formed by arc closing of the transverse welding seam is consistent with the width of the vertical welding seam, and the minor axis is consistent with the width of the transverse welding seam.
The welding process method of the T-shaped joint smooth welding seam at least comprises the following steps:
step 1: in the process of welding the transverse welding seam, firstly welding the transverse welding seam, fixing the welding material dry elongation welding seam according to the diameter of the welding material, and closing an arc to form an approximately elliptical arc pit when the transverse welding seam is finished; welding a vertical welding line, and filling and sealing an approximately elliptical arc pit formed by a transverse welding line during welding of the vertical welding line, as shown in figure 1;
and 2, step: and (3) forming an approximately elliptical arc pit when the transverse welding seam is in arc-closing, wherein the depth of the formed approximately elliptical arc pit is 2/3 of the thickness of the welding seam, as shown in figure 2, the staying time of a welding gun in the arc pit formed by arc-closing of the transverse welding seam is prolonged, the arc pit is filled with liquid metal to 1/3 of the depth of the arc pit, and 2/3 of the depth is reserved for filling of a vertical welding seam.
And step 3: the method for forming the arc crater of the transverse welding seam comprises the following steps:
and 3.1, when the transverse welding seam is closed, the size of the arc crater is determined by the working inclination angle of the welding gun and the welding arc column. The working inclination angle of the welding gun is dynamically balanced according to the arc blowing force and a welding pool, the working inclination angle of the welding gun is determined to be 70-85 degrees, as shown in figures 2 (a) and (c), the welding arc column is adjusted to enable the jet length of the welding arc column to be consistent with the width of a vertical welding seam and the width of the welding arc column to be consistent with the width of a transverse welding seam, as shown in figures 1 and 2 (b);
step 3.2 as shown in fig. 2, when the transverse welding seam is closed, the staying time of the welding gun for welding the arc crater is adjusted to obtain about 1/3 of the depth of the liquid metal filled arc crater so as to ensure that the transverse welding seam and the vertical welding seam are fully melted; filling and sealing 2/3 of the reserved depth by the vertical welding line to ensure that the T-shaped joint of the transverse welding line and the vertical welding line is fully fused, the appearance of the welding line is smooth, and the strength is consistent with the compactness;
and 4, step 4: when the transverse welding seam is in arc-closing, the staying point is slightly deviated to one side of the vertical welding seam, so that the vertical welding seam is fully filled and covered;
and 5: welding process of vertical weld joint based on transverse weld joint arc pit form
Step 5.1, the width of the vertical welding seam formed by welding is consistent with the major axis of the approximate elliptical arc pit formed by arc closing of the transverse welding seam, and the width of the molten pool formed into the approximate ellipse is approximately consistent with the major axis of the approximate elliptical arc pit formed by arc closing of the welding seam by adjusting the welding process parameters;
step 5.2, at the joint of the transverse welding seam and the vertical welding seam, prolonging the arc closing point residence time of the vertical welding seam so as to obtain enough heat, and remelting, filling and sealing an arc pit formed by arc closing formed by the transverse welding seam by using a welding pool of the vertical welding seam;
in the welding process from the step 1 to the step 5, the material quality, the size and the dry elongation of the welding material are kept unchanged, other auxiliary welding facilities are kept unchanged, and the welding work inclination angle range of the welding gun is 70-85 degrees.
In the step 1, the intersection point of the horizontal welding line and the vertical welding line is the intersection point of the central lines of the horizontal welding line and the vertical welding line.
The size of the approximate elliptical arc pit in the step 2 is the projection of the size of the arc column and the welding work inclination angle of the welding gun.
And 3, the sizes of the welding arc columns are uniformly adjusted, and the stability of the arc columns is consistent.
And 4, taking the intersection point of the central lines of the transverse welding seam and the vertical welding seam as a reference point for the arc-closing stopping point of the transverse welding seam in the step 4.
Claims (6)
1. A T-shaped joint smooth welding process method is characterized in that the T-shaped joint welding line at least comprises a section of transverse welding line and a section of vertical welding line, the transverse welding line is firstly welded, then the vertical welding line is welded, and the vertical welding line covers the tail part of the transverse welding line for welding; during welding, the arc pit of the tail arc-ending of the transverse welding seam is formed to approximate the shape and size of an elliptical arc pit, and the size of the arc pit of the tail arc-ending of the transverse welding seam is consistent with the width of the welding seam of the vertical welding seam; the depth of the arc pit of the closed arc of the transverse welding line is at most 2/3 of the thickness of the welding line, the approximately elliptical arc pit formed by the transverse welding line is filled and sealed during vertical welding, the arc pit of the closed arc of the transverse welding line is covered by the vertical welding line, namely, the arc pit of the closed arc of the transverse welding line is completely covered and melted by the molten pool of the vertical welding line when the arc pit of the transverse welding line is sealed by the vertical welding line, and the welding liquid metal at the joint does not generate deficiency or accumulation, so that the smooth and attractive forming of the welding line at the T-shaped joint is ensured, and the strength and the compactness are consistent.
2. The welding process method for the T-shaped smooth welding seam for the connection according to the claim 1, characterized in that the size of the crater of the arc closing at the tail part of the transverse welding seam is consistent with the width of the welding seam of the vertical welding seam, in particular, the size of the major axis of the approximate oval crater formed by the arc closing of the transverse welding seam is consistent with the width of the vertical welding seam, and the size of the minor axis is consistent with the width of the transverse welding seam.
3. The welding process method for the T-shaped smooth welding seam for the connection according to the claim 1, characterized in that the crater of the closed arc at the tail part of the transverse welding seam is controlled by the working inclination angle of the welding gun and the size of the welding arc column, thereby realizing the quantification of the welding closed arc process of the transverse welding and improving the controllability of the welding quality at the connection part of the transverse welding and the vertical welding.
4. The welding process method for the T-shaped butt smooth weld according to the claim 1, characterized in that the welding process method for the T-shaped butt weld at least comprises the following steps:
step 1: in the process of transverse welding seam welding, welding parameters are adjusted according to the diameter of a welding material and the dry elongation of the fixed welding material to weld the welding seam;
and 2, step: when the transverse welding seam is finished, the transverse welding seam is arched to form an approximately elliptical arc pit, and the depth of the formed approximately elliptical arc pit is 2/3 of the thickness of the welding seam; in the process of arc closing of the transverse welding seam, the stay point is slightly deviated to one side of the vertical welding seam, so that the vertical welding seam is fully filled and covered;
and 3, step 3: welding process of vertical weld based on transverse weld arc pit
3.1, the width of the vertical welding seam formed by welding is consistent with the major axis of the approximate elliptical arc pit formed by arc closing of the transverse welding seam, and the width of the molten pool formed into the approximate ellipse is approximately consistent with the major axis of the approximate elliptical arc pit formed by arc closing of the welding seam by adjusting the welding process parameters;
and 3.2, prolonging the stay time of the arc ending point of the vertical welding seam at the joint of the transverse welding seam and the vertical welding seam so as to obtain a welding pool for remelting, filling, sealing and the like the arc ending pit formed by the transverse welding seam.
5. The welding process method for the T-shaped butt smoothing weld according to claim 1, wherein the weld width h is determined by 0.7 times the thickness of the base material.
6. The welding process method of the T-shaped butt smooth welding seam according to the claim 1, characterized in that the forming process of the crater of the tail arc-closing of the transverse welding seam at least comprises the following steps:
step 1, the size of a crater of a transverse welding seam arc is determined by a welding gun working inclination angle and a welding arc column; the working inclination angle of the welding gun is dynamically balanced according to the arc blowing force and the welding molten pool, the working inclination angle of the welding gun is determined to be 70-85 degrees, the welding arc column is adjusted, the major axis of an approximate elliptical arc pit formed by arc closing at the tail part of the transverse welding seam is consistent with the width of the vertical welding seam, and the minor axis is consistent with the width of the transverse welding seam;
and 2, adjusting the residence time of the welding gun in the arc pit, obtaining about 1/3 of the depth of the liquid metal filled arc pit, and remelting, filling and sealing the 2/3 of the reserved depth by a vertical welding line.
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| CN202211146945.5A CN115519221A (en) | 2022-09-20 | 2022-09-20 | Welding process method for T-shaped joint smooth welding seam |
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| CN202211146945.5A CN115519221A (en) | 2022-09-20 | 2022-09-20 | Welding process method for T-shaped joint smooth welding seam |
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