CN114749821A - Welding method - Google Patents
Welding method Download PDFInfo
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- CN114749821A CN114749821A CN202210579783.8A CN202210579783A CN114749821A CN 114749821 A CN114749821 A CN 114749821A CN 202210579783 A CN202210579783 A CN 202210579783A CN 114749821 A CN114749821 A CN 114749821A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The embodiment of the application provides a welding method, which belongs to the technical field of welding, the welding method is used for welding a first weldment and a second weldment, the first weldment and the second weldment are projected along the arrangement direction of the first weldment and the second weldment, a projection area formed by the outline of a projection area of the first weldment and the outline of a projection area of the second weldment is a welding area with a polygonal outline, and the welding method comprises the following steps: determining a plurality of welding positions for welding a first weldment and a second weldment, wherein at least three welding positions are first welding positions, the first welding positions correspond to intersection points of two adjacent sidelines of the polygon, and the first welding positions are closer to the corresponding intersection points relative to other welding positions; positioning and welding: welding the first weldment and the second weldment at the first welding location; after tack welding, the first weldment and the second weldment are welded at the other welding positions than the first welding position among all the welding positions. The welding method improves the welding strength of the first weldment and the second weldment.
Description
Technical Field
The application relates to the technical field of welding, in particular to a welding method.
Background
During the processing of the parts, situations may be encountered where it is necessary to weld the two parts together. In the related art, there is a problem that the welding strength between two parts is insufficient.
Disclosure of Invention
In view of the above, embodiments of the present application are expected to provide a welding method to improve welding strength.
In order to achieve the above object, a first aspect of the embodiments of the present application provides a welding method for welding a first welding member and a second welding member, where an arrangement direction of the first welding member and the second welding member is a preset direction, and a projection area defined by an outer contour line of a projection area of the first welding member and an outer contour line of a projection area of the second welding member is a welding area, and the outer contour lines of the welding area are polygonal, the welding method including:
determining a plurality of welding positions for welding a first weldment and a second weldment, wherein at least three welding positions are first welding positions, the first welding positions are in one-to-one correspondence with intersections of two adjacent edges of the polygon, the distance between the intersection of the two adjacent edges of the polygon and the corresponding first welding position is a first distance, the distance between the intersection of the two adjacent edges of the polygon and other welding positions except the welding position corresponding to the first welding position in all the welding positions is a second distance, and the second distance is greater than the first distance;
Positioning and welding: welding the first weldment and the second weldment at the first welding location;
after the tack welding, welding the first weldment and the second weldment at the other welding locations than the first welding location among all the welding locations.
In an embodiment, welding the first weldment and the second weldment at the first welding location includes: and sequentially welding the first weldment and the second weldment at each first welding position along the circumferential direction.
In one embodiment, the polygon is a quadrilateral, welding the first weldment and the second weldment at the first welding location, comprising:
welding the first weldment and the second weldment at two first welding positions corresponding to one diagonal of the quadrangle;
and welding the first weldment and the second weldment at two first welding positions corresponding to the other diagonal of the quadrangle.
In one embodiment, the first weldment comprises a main weldment and an insert, the main weldment comprises a containing hole, the insert is located in the containing hole, a projection area formed by projection of the main weldment along a preset direction is a first projection area, a projection area formed by projection of the insert along the preset direction is a second projection area, the first welding position is located in the first projection area so that the main weldment and the second weldment are welded at the first welding position, at least one welding position is a second welding position, and the second welding position is located in the second projection area; welding the first weldment and the second weldment at the other of all of the welding locations than the first welding location, comprising: welding the insert and the second weldment at the second welding location.
In one embodiment, at least one of the welding positions in the first projection region is a third welding position, a region between every two adjacent first welding positions along the circumferential direction is a spacer region, and the third welding position is arranged in at least one spacer region; after welding the insert and the second weldment at the second welding location, welding the first weldment and the second weldment at the other of all the welding locations than the first welding location, further comprising: welding the primary weldment and the secondary weldment at the third welding location.
In one embodiment, at least one of the welding positions located in the second projection area is a fourth welding position located between two circumferentially adjacent second welding positions; after welding the main weldment and the second weldment at the third welding location, welding the first weldment and the second weldment at the other welding locations than the first welding location among all the welding locations, further comprising: welding the insert and the second weldment at the fourth weld location.
In one embodiment, the insert has a wide end and a narrow end, the width of the wide end being greater than the width of the narrow end, and the second weld location and the fourth weld location are both located at the wide end.
In one embodiment, at least a preset number of spacers is a target spacer, the second bonding position and the third bonding position are alternatively disposed in the target spacer, and the preset number is a difference between the total number of spacers and 1.
In one embodiment, the first weldment and the second weldment are partially melted by laser to weld the first weldment and the second weldment, and the first weldment and the second weldment are projected along the preset direction, wherein the welding position is located in an area where a projection area of the first weldment and a projection area of the second weldment overlap; and/or the welding mode between the first weldment and the second weldment is spot welding.
In one embodiment, the first weldment and the second weldment are both plate-like in shape; and/or the outer contour line of the projection area of the first welding part is positioned in the outer contour line of the projection area of the second welding part, and the welding area is an area surrounded by the outer contour line of the projection area of the first welding part.
The welding method of the embodiment of the application comprises the steps of firstly completing welding of a first weldment and a second weldment at all first welding positions, enabling the first weldment and the second weldment to complete welding near the intersection point of every two adjacent side lines of a polygon due to the fact that the intersection point of every two adjacent side lines of the polygon is in one-to-one correspondence with the first welding position, then completing welding of the first weldment and the second weldment at other welding positions, enabling the first weldment and the second weldment to be heated uniformly in the circumferential direction of a welding area, enabling stress displacement of the first weldment relative to the second weldment to be small, enabling the first weldment and the second weldment to be welded at the first welding position near the intersection point of every two adjacent side lines of the polygon, enabling the first weldment and the second weldment to be welded at the first welding position when the first weldment and the second weldment are welded at other welding positions except the first welding position, enabling the first welding position where welding is completed to inhibit stress displacement formed by welding of the first weldment and the second weldment at the welding position, make first weldment less for the stress displacement of second weldment to reduce the possibility that rosin joint and empty solder appear between first weldment and the second weldment, alleviate the rosin joint of first weldment and second weldment and the degree of empty solder, improve the welding strength between first weldment and the second weldment.
Drawings
Fig. 1 is a schematic view illustrating a state in which a first weldment and a second weldment are stacked in the related art;
FIG. 2 is a view taken along the line A in FIG. 1;
FIG. 3 is a schematic view of a first weldment and a second weldment in an overlapping configuration according to an embodiment of the application;
FIG. 4 is a view along the direction B in FIG. 3, and the intersection point of two adjacent edge lines is not shown;
FIG. 5 is a view taken along the line B in FIG. 3, which shows the intersection of two adjacent edge lines, and the dotted line is an extension of the polygon edge line;
FIG. 6 is a flow chart of a welding method according to an embodiment of the present application;
FIG. 7 is a flow chart of a welding method according to another embodiment of the present application;
fig. 8 is a flowchart of a welding method according to yet another embodiment of the present application.
Description of reference numerals: a first weldment 100; a main weldment 101; a first projection area 111; an insert 102; a second projection region 112; a second weldment 200; welding position 1; a first welding position 2; a second welding position 3; a third welding position 4; a fourth welding position 5; an intersection point S; a first distance D1; second distance D2.
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
Before describing the embodiments of the present application, it is necessary to analyze the reasons for insufficient welding strength in the related art, and obtain the technical solutions of the embodiments of the present application through reasonable analysis.
In the related art, first welding member 100 and second welding member 200 are welded, and are projected in the arrangement direction of first welding member 100 and second welding member 200, and a projection region surrounded by an outer contour line of a projection region of first welding member 100 and an outer contour line of a projection region of second welding member 200 is a welding region, and an outer contour line of the welding region is polygonal, and a plurality of welding positions for welding first welding member 100 and second welding member 200 are arranged in the circumferential direction of the polygon. The welding position corresponding to the intersection point of two adjacent sidelines of the polygon is a first welding position 2, the first welding position 2 corresponds to the intersection point of the two adjacent sidelines of the polygon one by one, the distance between the intersection point of the two adjacent sidelines of the polygon and the corresponding first welding position 2 is a first distance, the distance between the intersection point of the two adjacent sidelines of the polygon and other welding positions 1 except the welding position 1 corresponding to the first welding position 2 in all the welding positions is a second distance, the second distance is greater than the first distance, namely the distance between the intersection point of the two adjacent sidelines of the polygon and the corresponding first welding position 2 is closer than the other welding positions 1, and the first welding position 2 is closer to the intersection point. During the welding process of first weldment 100 and second weldment 200, first weldment 100 and second weldment 200 may not be welded at first welding position 2 corresponding to the intersection of each two adjacent edges of the polygon, and first weldment 100 and second weldment 200 are already welded at other welding positions 1, so that first weldment 100 and second weldment 200 are heated unevenly along the circumference of the polygonal welding area, first weldment 100 is subjected to stress displacement relative to second weldment 200, false welding or even empty welding is caused between first weldment 100 and second weldment 200 at part of welding positions, and the welding strength between first weldment 100 and second weldment 200 is reduced.
For example, referring to fig. 1 and 2, 9 welding positions for welding first weldment 100 and second weldment 200 are illustrated, wherein 4 welding positions are first welding positions 2, and there are other welding positions 1 between two circumferentially adjacent first welding positions 2. First weldment 100 and second weldment 200 are welded at the respective welding positions in turn counterclockwise in the circumferential direction of the polygonal welding zone with first welding position 2 at the upper left corner shown in the drawing as the start welding position. For example, referring to fig. 2, first weldment 100 and second weldment 200 are welded at each welding location in sequence, in the direction indicated by the arrows in the figure. In the process of welding the first weldment 100 and the second weldment 200 at the welding positions in turn counterclockwise along the circumferential direction of the polygonal welding area, before welding the first weldment 100 and the second weldment 200 at the first welding position 2 shown in the lower left corner, welding the first weldment 100 and the second weldment 200 at the welding position 1 between the first welding position 2 shown in the upper left corner and the first welding position 2 shown in the lower left corner along the circumferential direction, before welding the first weldment 100 and the second weldment 200 at the first welding position 2 shown in the lower right corner along the circumferential direction, welding the first weldment 100 and the second weldment 200 at the welding position 1 between the first welding position 2 shown in the lower left corner and the first welding position 2 shown in the lower right corner along the circumferential direction, that is to say, before welding the first weldment 100 and the second weldment 200 at all the first welding positions 2 is completed, welding other welding positions 1 outside the first welding position 2 is performed, the first welding member 100 and the second welding member 200 are heated unevenly along the circumference of the polygonal welding area, the first welding member 100 is subjected to stress displacement relative to the second welding member 200, and a cold joint or even a blank joint between the first welding member 100 and the second welding member 200 is caused at a part of the welding position, so that the welding strength between the first welding member 100 and the second welding member 200 is reduced.
It is understood that the cold and empty solder conditions appear more pronounced in laser welding. Some laser welding does not apply a welding material, but directly welds two base materials to be welded together by laser energy, for example, the first weldment 100 and the second weldment 200 are welded together after being partially melted by the laser energy without the welding material filling between the first weldment 100 and the second weldment 200, in this case, once a large stress displacement occurs between the first weldment 100 and the second weldment 200, which results in that the first weldment 100 and the second weldment 200 cannot be well attached, the first weldment 100 and the second weldment 200 form a void weld and a cold weld, which will have a large influence on the welding strength, and the welding strength between the first weldment 100 and the second weldment 200 is insufficient.
It is understood that other methods than laser welding, such as welding by filling solder between first and second welding members 100 and 200, may be used to weld first and second welding members 100 and 200 at welding positions 1 other than first welding position 2 before welding of first and second welding members 100 and 200 is completed at all first welding positions 2, and may also cause empty or faulty welding due to stress displacement caused by uneven heating along the circumferential direction of the welding region.
The cold joint is understood to mean that two parts to be welded are not completely welded at the position to be welded due to stress displacement or the like at the portion to be welded, and thus the two parts are not sufficiently welded firmly. A dry solder is understood to be a more severe condition than a cold solder, and two parts for soldering may be almost detached without forming a solder joint at a position where the solder should be attached due to a large stress displacement accumulated in the solder.
In view of this, the present embodiment provides a welding method for welding the first weldment 100 and the second weldment 200.
In one embodiment, the first weldment 100 and the second weldment 200 are integral parts of the valve plate.
In one embodiment, the arrangement direction of the first weldment 100 and the second weldment 200 is a predetermined direction.
In one embodiment, referring to fig. 3, the predetermined direction is the direction indicated by the arrow R1.
In an embodiment, referring to fig. 3 to 5, a projected area surrounded by an outer contour of the projected area of the first welding member 100 and an outer contour of the projected area of the second welding member 200 projected along a predetermined direction is a welding area, and the outer contour of the welding area is polygonal.
It should be noted that, the polygon referred to in the embodiments of the present application includes not only a case where two adjacent edge lines in the edge lines of the polygon directly intersect, but also a case where two adjacent edge lines transition through an arc line to form a rounded corner. The shape of the corresponding outer contour line cannot be excluded from the polygon due to the arc transition between two adjacent edge lines by rounding.
In an embodiment, referring to fig. 4 and 5, the outer contour of the projection area of the first welding member 100 is located within the outer contour of the projection area of the second welding member 200 when projected along the predetermined direction, and the welding region is the region surrounded by the outer contour of the projection area of the first welding member 100.
It should be noted that the outer contour of the projection area of the first welding member 100 is located within the outer contour of the projection area of the second welding member 200, which includes various situations. In one case, the outer contour line of the projection area of the first welding member 100 is located within the outer contour line of the projection area of the second welding member 200, and it is understood that the outer contour line of the projection area of the first welding member 100 and the outer contour line of the projection area of the second welding member 200 are overlapped. In one case, the outer contour line of the projection area of the first welding member 100 is located within the outer contour line of the projection area of the second welding member 200, and it is understood that the outer contour line of the projection area of the first welding member 100 is partially overlapped with the outer contour line of the projection area of the second welding member 200, and the outer contour line of the projection area of the first welding member 100, which is not overlapped with the outer contour line of the projection area of the second welding member 200, is located within the area surrounded within the outer contour line of the projection area of the second welding member 200. In one case, the outer contour of the projected area of the first welding member 100 and the outer contour of the projected area of the second welding member 200 do not coincide, and the outer contour of the projected area of the first welding member 100 is entirely located within the area surrounded by the outer contour of the projected area of the second welding member 200.
In one embodiment, referring to fig. 3 to 5, the first weldment 100 and the second weldment 200 are both plate-shaped.
It is understood that the shapes of the first weldment 100 and the second weldment 200 are not limited to the plate shape, and may be provided in other shapes according to actual needs.
In one embodiment, referring to fig. 3, the thickness of the first weldment 100 is less than the thickness of the second weldment 200.
In one embodiment, a welding method includes: determining a plurality of welding positions for welding a first weldment 100 and a second weldment 200, wherein at least three welding positions are first welding positions 2, the first welding positions 2 correspond to intersection points S of two adjacent lines of the polygon in a one-to-one manner, the distance between the intersection point S of the two adjacent lines of the polygon and the corresponding first welding position 2 is a first distance D1, the distance between the intersection point S of the two adjacent lines of the polygon and other welding positions except the welding position corresponding to the first welding position 2 among all the welding positions is a second distance D2, and the second distance D2 is greater than the first distance D1. Thus, the welding position is well determined, and the first welding position 2 can be determined according to the distance between the welding position and the intersection point S of two adjacent sidelines of the polygon. The first welding position 2 is closer to the intersection S of two adjacent borderlines of the polygon than to the other welding positions.
It should be noted that the intersection point S of two adjacent edge lines of the polygon may be an intersection point S formed by two adjacent edge lines directly intersecting each other, or an intersection point S formed by extension lines of two adjacent edge lines intersecting each other.
In an embodiment, referring to fig. 4 to 6, the welding method further includes:
step S101: positioning and welding: welding said first weldment 100 and said second weldment 200 at said first welding location 2;
step S102: after the tack welding, the first weldment 100 and the second weldment 200 are welded at the other welding positions than the first welding position 2 among all the welding positions.
Thus, in the welding method of the embodiment of the present application, the first weldment 100 and the second weldment 200 are welded at all the first welding positions 2, because the intersection point S of every two adjacent sides of the polygon is in one-to-one correspondence with the first welding position 2, the first weldment 100 and the second weldment 200 are welded near the intersection point S of every two adjacent sides of the polygon, and then the welding of the first weldment 100 and the second weldment 200 is completed at other welding positions, so that the first weldment 100 and the second weldment 200 are heated more uniformly along the circumferential direction of the welding region, the stress displacement of the first weldment 100 relative to the second weldment 200 is small, because the first weldment 100 and the second weldment 200 are welded at the first welding position 2 near the intersection point S of every two adjacent sides of the polygon, when the first weldment 100 and the second weldment 200 are welded at other welding positions outside the first welding position 2, stress displacement caused by welding first weldment 100 and second weldment 200 at its welding position can be suppressed at first welding position 2 where welding has been completed, so that stress displacement of first weldment 100 relative to second weldment 200 is small, thereby reducing the possibility of occurrence of cold joint and empty joint between first weldment 100 and second weldment 200, alleviating the extent of cold joint and empty joint of first weldment 100 and second weldment 200, and improving the welding strength between first weldment 100 and second weldment 200.
In one embodiment, first weldment 100 and second weldment 200 are laser welded together.
It will be appreciated that there are a variety of ways of laser welding. In one embodiment, partial laser welding requires a welding material by which first weldment 100 and second weldment 200 are welded together. In another embodiment, the partial laser welding does not require welding material, and the first weldment 100 and the second weldment 200 are partially melted by laser to weld the first weldment 100 and the second weldment 200, so as to achieve the purpose of welding the first weldment 100 and the second weldment 200.
It is understood that there may be a through hole or a gap in the first weldment 100 or a through hole or a gap in the second weldment 200. In an embodiment, referring to fig. 4 and 5, projected along the preset direction, the welding position is located in an area where a projection area of the first weldment 100 and a projection area of the second weldment 200 overlap. In this way, the welding position avoids both the position of the through hole or the notch on the first weldment 100 and the position of the through hole or the notch on the second weldment 200, so that the welding gun can weld the first weldment 100 and the second weldment 200 through laser partial fusion from the side of the first weldment 100 departing from the second weldment 200 at each welding position, or the welding gun can weld the first weldment 100 and the second weldment 200 through laser partial fusion from the side of the second weldment 200 departing from the first weldment 100 at each welding position.
In one embodiment, the welding between first weldment 100 and second weldment 200 is spot welding.
In one embodiment, first weldment 100 and second weldment 200 are spot welded at each welding location by a laser.
In an embodiment, when first weldment 100 and second weldment 200 are partially melted by a laser to weld first weldment 100 and second weldment 200, a laser torch may be disposed on a side of first weldment 100 facing away from second weldment 200 to weld, the laser energy being capable of welding first weldment 100 and second weldment 200 together through a thickness of first weldment 100.
In an embodiment, when first weldment 100 and second weldment 200 are partially melted by the laser to weld first weldment 100 and second weldment 200, a laser torch may be disposed on the side of second weldment 200 facing away from first weldment 100 to weld, and the laser energy is capable of welding first weldment 100 and second weldment 200 together through a thickness of second weldment 200.
In an embodiment, when the thickness of the first weldment 100 in the arrangement direction of the first weldment 100 and the second weldment 200 is smaller than the thickness of the second weldment 200 in the arrangement direction of the first weldment 100 and the second weldment 200, the first weldment 100 and the second weldment 200 are partially melted by the laser to weld the first weldment 100 and the second weldment 200, and the laser welding gun may be arranged on a side of the first weldment 100 opposite to the first weldment 100 to enable the laser energy to better penetrate through the first weldment 100 to weld the first weldment 100 and the second weldment 200 together.
In an embodiment, referring to fig. 4, 5 and 7, welding the first weldment 100 and the second weldment 200 at the first welding location 2 includes:
step S201: the first weldment 100 and the second weldment 200 are welded in succession in the circumferential direction at each first welding position 2.
In this way, the movement trajectory of the welding torch is smooth, and the trajectory of the welding torch moving between the two first welding positions 2 is less likely to change while intersecting each other.
In an embodiment, referring to fig. 4 and 5, the first welding position 2 at the upper left corner in the figure is taken as a starting welding position, and the first weldment 100 and the second weldment 200 are welded at each first welding position 2 in sequence along the counterclockwise direction.
In an embodiment, referring to fig. 4, 5 and 8, an outer contour line of the welding region is a polygon, the polygon is a quadrangle, and the welding of the first weldment 100 and the second weldment 200 at the first welding position 2 includes:
step S202: welding the first weldment 100 and the second weldment 200 at two first welding positions 2 corresponding to one diagonal of the quadrangle;
step S203: the first weldment 100 and the second weldment 200 are welded at two first welding positions 2 corresponding to the other diagonal of the quadrilateral.
Thus, referring to the diagonal lines of the quadrangle as a sequence, in the process of welding the first weldment 100 and the second weldment 200 at each first welding position 2, the first weldment 100 and the second weldment 200 are uniformly heated along the circumferential direction of the welding area, which is beneficial to reducing the stress displacement of the first weldment 100 relative to the second weldment 200 and improving the welding strength between the first weldment 100 and the second weldment 200.
In an embodiment, referring to fig. 4 and 5, the first weldment 100 includes a main weldment 101 and an insert 102, the main weldment 101 has a receiving hole, the insert 102 is located in the receiving hole, a projection area formed by projecting the main weldment 101 along a preset direction is a first projection area 111, a projection area formed by projecting the insert 102 along the preset direction is a second projection area 112, the first welding position 2 is located in the first projection area 111, so that the main weldment 101 and the second weldment 200 are welded at the first welding position 2, at least one of the welding positions is a second welding position 3, and the second welding position 3 is located in the second projection area 112.
In one embodiment, referring to fig. 4, 5, 7 and 8, welding said first weldment 100 and said second weldment 200 in all of said welding locations other than said first welding location 2 includes:
Step S204: the insert 102 and the second weldment 200 are welded at the second welding locations 3.
In this way, after the welding of the main weldment 101 to the second weldment 200 is completed at each of the first welding positions 2, the insert 102 and the second weldment 200 are welded at the second welding position 3 to achieve the fixation between the insert 102 and the second weldment 200. Reducing the stress displacement between the insert 102 and the second weldment 200 improves the weld strength of the insert 102 and the second weldment 200.
In an embodiment, referring to fig. 4 and 5, the welding region is defined by an outer contour of the projection region of the first welding member 100, and the region defined by the outer contour of the projection region of the first welding member 100 is defined by an outer contour of the projection region of the main welding member 101. That is, the welding region is a region surrounded by the outer contour of the first projected region 111.
In one embodiment, referring to fig. 4 and 5, welding the first weldment 100 to the second weldment 200 at the first welding location 2 includes: the first weldment 100 and the second weldment 200 are welded in the circumferential direction in sequence at each first welding position 2. One of the first welding positions 2 is a starting welding position. When the number of second welding locations 3 is two, welding the insert 102 and the second weldment 200 at the second welding locations 3 includes: the insert 102 is welded to the second weldment 200 at the second welding location 3 near the initial welding location, and after the welding of the insert 102 to the second weldment 200 is completed at the second welding location 3 near the initial welding location, the insert 102 is welded to the second weldment 200 at the remaining one of the second welding locations 3.
In an embodiment, referring to fig. 4 and fig. 5, at least one of the welding positions located in the first projection area 111 is a third welding position 4, an area between every two adjacent first welding positions 2 along the circumferential direction is a spacer area, and the third welding position 4 is disposed in at least one spacer area.
In an embodiment, referring to fig. 4, 5, 7, and 8, after welding the insert 102 and the second weldment 200 at the second welding location 3, welding the first weldment 100 and the second weldment 200 at welding locations other than the first welding location 2 among all the welding locations further comprises:
step S205: welding the main weldment 101 and the second weldment 200 at the third welding locations 4.
In this way, after the welding between the insert 102 and the second weldment 200 is completed at the second welding location 3, the main weldment 101 is welded to the second weldment 200 at the third welding location 4, and further the main weldment 101 and the second weldment 200 are welded firmly. The insert 102 and the second weldment 200 are welded at the second welding position 3, and the main weldment 101 and the second weldment 200 are further welded firmly at the third welding position 4, so that stress displacement between the insert 102 and the second weldment 200 is reduced, and the welding strength of the insert 102 and the second weldment 200 is improved. Stress displacement caused by welding the main weldment 101 and the second weldment 200 at the third welding position 4 is limited by the main weldment 101 and the second weldment 200 which are welded at the first welding position 2, so that stress displacement caused by welding the main weldment 101 and the second weldment 200 at the third welding position 4 is smaller, and the welding strength of the main weldment 101 and the second weldment 200 is improved.
In an embodiment, referring to fig. 4 and 5, welding the first weldment 100 and the second weldment 200 at the first welding location 2 includes: the first weldment 100 and the second weldment 200 are welded in succession in the circumferential direction at each first welding position 2. One of the first welding positions 2 is a starting welding position. The number of third welding locations 4 is two, and the two second welding locations 3 are located circumferentially between the two third welding locations 4, and welding the main weldment 101 and the second weldment 200 at the third welding locations 4 includes: main weldment 101 and second weldment 200 are welded at third welding position 4 near the initial welding position, and after the welding of main weldment 101 and second weldment 200 is completed at third welding position 4 near the initial welding position, main weldment 101 and second weldment 200 are welded at the remaining one third welding position 4.
In an embodiment, referring to fig. 4 and fig. 5, at least one of the welding positions located in the second projection area 112 is a fourth welding position 5, and the fourth welding position 5 is located between two circumferentially adjacent second welding positions 3.
In an embodiment, referring to fig. 4, 5, 7, and 8, after welding main weldment 101 and second weldment 200 at third welding location 4, welding first weldment 100 and second weldment 200 at all welding locations other than first welding location 2 further comprises:
Step S206: the insert 102 and the second weldment 200 are welded at the fourth welding locations 5.
In this manner, the further weld securing of the main weldment 101 and the second weldment 200 at the third welding location 4 can suppress the stress displacement of the main weldment 101 relative to the second weldment 200 at the edge of the accommodation hole, the further weld securing of the insert 102 and the second weldment 200 at the fourth welding location 5 after the welding of the main weldment 101 and the second weldment 200 at the third welding location 4 is completed, the stress displacement of the main weldment 101 relative to the second weldment 200 at the edge of the accommodation hole that may be caused during the welding of the insert 102 and the second weldment 200 at the fourth welding location 5 is reduced, the stress displacement of the insert 102 relative to the second weldment 200 that is caused by the welding of the insert 102 and the second weldment 200 at the fourth welding location 5 is restricted by the insert 102 and the second weldment 200 that have been welded at the second welding location 3, so that the stress displacement of the insert 102 relative to the second weldment 200 that is caused by the welding of the insert 102 and the second weldment 200 at the fourth welding location 5 is smaller, the welding strength of the main weldment 101 and the second weldment 200 and the welding strength of the insert 102 and the first weldment 100 are improved.
In one embodiment, referring to fig. 4 and 5, the insert 102 has a wide end and a narrow end, the width of the wide end is greater than the width of the narrow end, and the second welding position 3 and the fourth welding position 5 are located at the wide end. So, second welding position 3 and fourth welding position 5 are located wide end and make second welding position 3 and fourth welding position 5 distribute in great scope along the circumference distribution of weld zone, and second welding position 3 and fourth welding position 5 distribute comparatively dispersedly for inserts 102 and second weldment 200 are heated comparatively evenly.
In one embodiment, the narrow end may not be welded to the second welding member 200, and the narrow end may contact or separate from the second welding member 200 under the driving of an external force, thereby functioning like a spring.
In one embodiment, at least a preset number of spacers is a target spacer within which the second and third bonding locations 3 and 4 are alternatively located, the preset number being the difference between the total number of spacers and 1. In this way, at least the preset number of spacers are the target spacers, the preset number is the difference between the total number of the spacers and 1, the preset number of target spacers can be approximately uniformly distributed along the circumferential direction of the welding zone, after the main weldment 101 and the second weldment 200 are welded at the first welding position 2, the insert 102 and the second weldment 200 are welded at the second welding position 3 in the target spacers, and the main weldment 101 and the second weldment 200 are welded at the third welding position 4 in the target spacers, so that during the welding process at the second welding position 3 and the third welding position 4, the main weldment 101, the insert 102 and the second weldment 200 are heated uniformly along the circumferential direction of the welding zone, which is beneficial to improving the welding strength between the main weldment 101 and the second weldment 200 and the welding strength between the insert 102 and the second weldment 200.
In an embodiment, referring to fig. 4 and 5, an outer contour line of the welding region is a quadrangle, and with reference to one of the first welding positions 2, the first welding position 2, the third welding position 4, the first welding position 2, the second welding position 3, the fourth welding position 5, the second welding position 3, the first welding position 2, the third welding position 4, and the first welding position 2 are sequentially distributed along a counterclockwise direction of the welding region. The second weld location 3 and the fourth weld location 5 are both located at the wide end of the insert 102. When the wide and narrow ends of the insert 102 are arranged in an up-down direction with the narrow end facing and the wide end facing down, a person faces the first weldment 100 in a direction in which the first weldment 100 is directed toward the second weldment 200, one of the third welding locations 4 being on the left side of the insert 102 and the other third welding location 4 being on the right side of the insert 102. Welding the main weldment 101 and the second weldment 200 at each first welding position 2 in turn counterclockwise along the circumferential direction of the welding zone from a first welding position 2 near the narrow end of the insert 102 and on the left side of the insert 102, welding the insert 102 and the second weldment 200 at a second welding position 3 on the left side of the insert 102 after welding the main weldment 101 and the second weldment 200 at each first welding position 2, welding the insert 102 and the second weldment 200 at a second welding position 3 on the right side of the insert 102 after welding the insert 102 and the second weldment 200 at a second welding position 3 on the left side of the insert 102, welding the main weldment 101 and the second weldment 200 at a third welding position 4 on the left side of the insert 102 after welding the insert 102 and the second weldment 200 at the second welding position 3 on the right side of the insert 102, and welding the main weldment 101 and the second weldment 200 at a third welding position 4 on the left side of the insert 102 after welding the main weldment 101 and the second weldment 200 at a third welding position 4 on the left side of the insert 102, the main weldment 101 and the second weldment 200 are welded at a third welding location 4 located to the right of the insert 102, and after the main weldment 101 and the second weldment 200 are welded at a third welding location 4 located to the right of the insert 102, the insert 102 and the second weldment 200 are welded at a fourth welding location 5. The welding method enables the first weldment 100 and the second weldment 200 to be heated uniformly along the circumferential direction of a welding area, the stress displacement of the first weldment 100 relative to the second weldment 200 is small, and the welding strength of the first weldment 100 and the first weldment 100 is improved.
The various embodiments/implementations provided herein can be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A welding method for welding a first weldment and a second weldment, wherein an arrangement direction of the first weldment and the second weldment is a preset direction, the first weldment and the second weldment are projected in the preset direction, a projected area defined by an outer contour line of a projected area of the first weldment and an outer contour line of a projected area of the second weldment is a weld area, and the outer contour line of the weld area is a polygon, the welding method comprising:
determining a plurality of welding positions for welding a first weldment and a second weldment, wherein at least three welding positions are first welding positions, the first welding positions correspond to intersection points of two adjacent sidelines of the polygon in a one-to-one manner, the distance between the intersection point of the two adjacent sidelines of the polygon and the corresponding first welding position is a first distance, the distance between the intersection point of the two adjacent sidelines of the polygon and other welding positions except the welding position corresponding to the first welding position in all the welding positions is a second distance, and the second distance is greater than the first distance;
Positioning and welding: welding the first weldment and the second weldment at the first welding location;
after the tack welding, welding the first weldment and the second weldment at the other welding locations than the first welding location among all the welding locations.
2. The welding method of claim 1, wherein welding the first weldment and the second weldment at the first welding location comprises: and sequentially welding the first weldment and the second weldment at each first welding position along the circumferential direction.
3. The welding method of claim 1, wherein the polygon is a quadrilateral, welding the first weldment and the second weldment at the first welding location comprises:
welding the first weldment and the second weldment at two first welding positions corresponding to one diagonal of the quadrangle;
and welding the first weldment and the second weldment at two first welding positions corresponding to the other diagonal of the quadrangle.
4. The welding method according to claim 1, wherein the first weldment comprises a main weldment and an insert, the main weldment has a receiving hole, the insert is located in the receiving hole, a projection area formed by projection of the main weldment along a preset direction is a first projection area, a projection area formed by projection of the insert along the preset direction is a second projection area, the first welding position is located in the first projection area so that the main weldment and a second weldment are welded at the first welding position, at least one welding position is a second welding position, and the second welding position is located in the second projection area; welding the first weldment and the second weldment at the other of all of the welding locations than the first welding location, including: welding the insert and the second weldment at the second weld location.
5. The welding method according to claim 4, wherein at least one of the welding positions located within the first projected area is a third welding position, an area between every two circumferentially adjacent first welding positions is a spacer area, and the third welding position is provided in at least one of the spacer areas; after welding the insert and the second weldment at the second welding locations, welding the first weldment and the second weldment at the other of all of the welding locations than the first welding location, further comprising: welding the main weldment and the second weldment at the third welding location.
6. The welding method of claim 5, wherein at least one of said welding locations located within said second projected area is a fourth welding location located between two circumferentially adjacent second welding locations; after welding the main weldment and the second weldment at the third welding location, welding the first weldment and the second weldment at the other welding locations than the first welding location among all the welding locations, further comprising: welding the insert and the second weldment at the fourth weld location.
7. The welding method of claim 6, wherein the insert has a wide end and a narrow end, the width of the wide end being greater than the width of the narrow end, the second weld location and the fourth weld location each being located at the wide end.
8. The welding method according to claim 5, characterized in that at least a preset number of spacers is a target spacer, the second welding position and the third welding position are alternatively arranged within the target spacer, the preset number being a difference between the total number of spacers and 1.
9. Welding method according to any one of claims 1 to 8, wherein the first and second weldments are welded by partially melting them by means of a laser, projected along said predetermined direction, said welding position being located in a region where the projected area of said first weldment and the projected area of said second weldment overlap; and/or the welding mode between the first weldment and the second weldment is spot welding.
10. The welding method according to any one of claims 1 to 8, wherein each of the first and second weldments has a plate-like shape; and/or the outer contour line of the projection area of the first welding part is positioned in the outer contour line of the projection area of the second welding part, and the welding area is an area surrounded by the outer contour line of the projection area of the first welding part.
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