CN115041796A - Welding method and welding device for automobile longitudinal beam structure - Google Patents
Welding method and welding device for automobile longitudinal beam structure Download PDFInfo
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- CN115041796A CN115041796A CN202210765162.9A CN202210765162A CN115041796A CN 115041796 A CN115041796 A CN 115041796A CN 202210765162 A CN202210765162 A CN 202210765162A CN 115041796 A CN115041796 A CN 115041796A
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
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Abstract
The invention discloses a welding method and a welding device for an automobile longitudinal beam structure, wherein the welding method for the automobile longitudinal beam structure welds the automobile longitudinal beam structure through pre-welding assembly, spot welding positioning, spot welding, repair welding positioning and repair welding, specifically, two longitudinal beam sections are mutually lapped to ensure that corresponding bottom plates of the two longitudinal beam sections are attached, the corresponding side plates are isolated from each other, the corresponding outward flanges are isolated from each other, the clamping mechanism is adopted to position the two longitudinal beam sections according to a first combined arrangement strategy, spot welding the two longitudinal beam sections by a first welding strategy to form a primary welding longitudinal beam structure, positioning the primary welding longitudinal beam structure by a clamping mechanism and a second combined arrangement strategy, and (3) repair welding the initially welded longitudinal beam structure by using a second welding strategy to form the longitudinal beam structure, so that the deformation of the longitudinal beam structure in the welding process is effectively controlled, and the welding quality is improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a welding method and a welding device for an automobile longitudinal beam structure.
Background
In the field of automobile manufacturing, a longitudinal beam is used as a main structural component of a bearing automobile body and is an important component of a rear floor assembly, the precision of the longitudinal beam can affect the precision of the rear floor assembly, a reference surface for measuring a white automobile body is usually arranged on the longitudinal beam, the welding precision is very important, the longitudinal beam is generally formed by welding a front section and a rear section, the structure is U-shaped, welding spots needing to be welded are generally three profiles, for good assembly parts, the bottom surfaces are generally attached, the profiles on two sides are separated from each other, and the result is that the longitudinal beam is twisted and tilted after being welded to cause the reduction of the precision, so that the application provides a welding method and a welding device for the automobile longitudinal beam structure, and the deformation in the welding process of the longitudinal beam is reduced.
Disclosure of Invention
The invention mainly aims to provide a welding method and a welding device for a longitudinal beam structure of an automobile, and aims to reduce deformation in the longitudinal beam welding process.
In order to achieve the above object, the present invention provides a welding method for a longitudinal beam structure of an automobile, where the longitudinal beam structure includes at least two longitudinal beam sections, each of the longitudinal beam sections includes a bottom plate and two side plates disposed on opposite sides of the bottom plate, and an end of at least one of the side plates is bent to form an outward flange, the welding method for the longitudinal beam structure of the automobile includes:
assembling before welding: the two longitudinal beam sections are mutually lapped, so that the corresponding bottom plates of the two longitudinal beam sections are attached, the corresponding side plates are isolated from each other, and the corresponding outward flanges are isolated from each other;
spot welding and positioning: positioning the two longitudinal beam sections by a first combined arrangement strategy by adopting a clamping mechanism;
spot welding: spot welding the two longitudinal beam sections by using a first welding strategy to form an initial welding longitudinal beam structure;
repair welding and positioning: positioning the primary welding longitudinal beam structure by adopting a clamping mechanism according to a second combined arrangement strategy;
repair welding: and performing repair welding on the initially welded longitudinal beam structure by using a second welding strategy to form the longitudinal beam structure.
Optionally, assembling before welding: and (2) overlapping two longitudinal beam sections to ensure that the bottom plates corresponding to the two longitudinal beam sections are attached, and the corresponding side plates are isolated from each other by a space and the corresponding flanges are isolated from each other by a space:
the interval between the side plates corresponding to the two longitudinal beam sections is L1, wherein the distance between the side plates is more than 0mm and less than or equal to 3mm than L1; and/or the presence of a gas in the gas,
the interval between the outward flanges corresponding to the two longitudinal beam sections is L2, wherein the distance between the outward flanges is more than 0mm and less than or equal to 3mm than L2.
Optionally, in the "spot welding positioning: positioning two of the stringer sections "in a first combined arrangement strategy using a clamping mechanism:
the first combined arrangement strategy comprises that the distance between the clamping mechanism and the welding position on the two longitudinal beams which are mutually overlapped is L3 along the length direction of the longitudinal beam sections, wherein the distance is 50mm < L3 is less than or equal to 100 mm.
Optionally, assembling before welding: with two the mutual overlap joint of girder segment to make the bottom plate that two girder segments correspond to paste mutually and connect, keep apart the space between the curb plate that corresponds, still include before the step of keeping apart the space between the flanging that corresponds "between:
initial positioning: and respectively carrying out primary positioning on the two longitudinal beam sections through positioning components.
Optionally, the "spot welding: in the step of spot welding two of the stringer sections with a first welding strategy to form a tack-welded stringer structure ", the first welding strategy comprises:
in the direction departing from the bottom plate, two side plates corresponding to two longitudinal beam sections which are mutually overlapped are respectively subjected to spot welding in sequence through a welding device so as to form a plurality of first welding spots on the side plates corresponding to the initially welded longitudinal beam structure, wherein in the plurality of first welding spots, two adjacent first welding spots are arranged in a staggered manner;
and spot welding is carried out on the two base plates corresponding to the longitudinal beam sections in a mutually overlapped mode through a welding device, so that a plurality of second welding spots are formed on the base plates corresponding to the primary welding longitudinal beam structures, and in the plurality of second welding spots, the two adjacent second welding spots are arranged in a staggered mode.
Optionally, the "repair welding: and in the step of performing repair welding on the initially welded longitudinal beam structure by using a second welding strategy to form the longitudinal beam structure', the second welding strategy comprises the following steps:
in the direction departing from the bottom plate, spot welding is sequentially carried out on two side plates corresponding to the initially welded longitudinal beam structure through a welding device respectively so as to form a plurality of third welding spots on the side plates corresponding to the longitudinal beam structure, wherein in the plurality of third welding spots, two adjacent third welding spots are arranged in a staggered manner;
and spot welding is carried out on the bottom plate corresponding to the initially welded longitudinal beam structure through a welding device, so that a plurality of fourth welding spots are formed on the bottom plate corresponding to the longitudinal beam structure, wherein in the plurality of fourth welding spots, two adjacent fourth welding spots are arranged in a staggered manner.
Optionally, the first welding strategy comprises: forming a plurality of first welding spots on the side plate corresponding to the primary welding longitudinal beam structure through a welding device, wherein in the plurality of first welding spots, two adjacent first welding spots are arranged in a staggered manner;
the second welding strategy comprises: forming a plurality of third welding points on the side plate corresponding to the longitudinal beam structure through a welding device, wherein in the plurality of third welding points, two adjacent third welding points are arranged in a staggered manner;
the middle parts of the straight lines where the two connected first welding spots are located and the straight lines where the two adjacent third welding spots are located are intersected.
Optionally, the first welding strategy comprises: forming a plurality of second welding spots on the bottom plate corresponding to the primary welding longitudinal beam structure through a welding device, wherein two adjacent second welding spots in the plurality of second welding spots are arranged in a staggered manner;
the second welding strategy comprises: forming a plurality of fourth welding spots on the bottom plate corresponding to the longitudinal beam structure through a welding device, wherein in the plurality of fourth welding spots, two adjacent fourth welding spots are arranged in a staggered manner;
the middle parts of the straight lines of the two second welding spots and the straight lines of the two adjacent fourth welding spots are intersected.
In order to achieve the above object, the present invention provides a welding device for welding a longitudinal beam structure, wherein the longitudinal beam structure includes at least two longitudinal beam sections, and the welding device includes:
a base;
the clamping mechanism is arranged on the base and comprises supporting parts and pressing parts which are arranged at intervals, and a clamping space for clamping and positioning the two longitudinal beam sections is formed between the supporting parts and the pressing parts; and the number of the first and second groups,
and the welding assembly is used for carrying out spot welding on the two longitudinal beam sections which are mutually overlapped.
Optionally, the welding device further includes at least two sets of positioning structures, each of the positioning structures includes a positioning pin and a positioning hole, the positioning pin and the positioning hole are matched with each other, the positioning pin is disposed on the base, and the positioning hole is used for being disposed on the longitudinal beam section.
In the welding method of the automobile longitudinal beam structure, the automobile longitudinal beam structure is welded through pre-welding assembly, spot welding positioning, spot welding, repair welding positioning and repair welding, specifically, two longitudinal beam sections are overlapped to enable bottom plates corresponding to the two longitudinal beam sections to be attached, a gap is formed between corresponding side plates, a gap is formed between corresponding outer flanges, the two longitudinal beam sections are positioned through a first combination arrangement strategy by adopting a clamping mechanism, the two longitudinal beam sections are spot-welded through the first welding strategy to form a primary welding longitudinal beam structure, the primary welding longitudinal beam structure is positioned through a second combination arrangement strategy by adopting the clamping mechanism, and the primary welding longitudinal beam structure is repair-welded through the second welding strategy to form the longitudinal beam structure, so that the deformation of the longitudinal beam structure in the welding process is effectively controlled, and the welding quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating an embodiment of a method for welding a longitudinal beam structure of an automobile according to the present invention;
FIG. 2 is a schematic structural view of an embodiment of a vehicle rail structure provided by the present invention;
FIG. 3 is a schematic structural view of a first longitudinal beam section and a second longitudinal beam section of the automobile longitudinal beam structure shown in FIG. 2, which are welded at the joint;
FIG. 4 is a schematic structural view of a second longitudinal beam section and a third longitudinal beam section welded at an overlapping portion of the longitudinal beam structure of the automobile in FIG. 2;
FIG. 5 is a cross-sectional view of the lap joint of the vehicle rail structure A of FIG. 2;
FIG. 6 is a cross-sectional view of the lap joint of the vehicle rail structure B of FIG. 2;
FIG. 7 is a schematic structural diagram of an embodiment of a welding apparatus provided in the present invention;
fig. 8 is a schematic cross-sectional view of fig. 7.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the field of automobile manufacturing, a longitudinal beam is used as a main structural component of a bearing automobile body and is an important component of a rear floor assembly, the precision of the longitudinal beam can affect the precision of the rear floor assembly, a reference surface for measuring a white automobile body is usually arranged on the longitudinal beam, the welding precision is very important, the longitudinal beam is generally formed by welding a front section and a rear section, the structure is U-shaped, welding spots needing to be welded are generally three profiles, for good assembly parts, the bottom surfaces are generally attached, the profiles on two sides are separated from each other, and the result is that the longitudinal beam is twisted and tilted after being welded to cause the reduction of the precision, so that the application provides a welding method and a welding device for the automobile longitudinal beam structure, and the deformation in the welding process of the longitudinal beam is reduced.
The invention provides a welding method and a welding device for an automobile longitudinal beam structure, wherein figures 1 to 4 are schematic structural diagrams of an embodiment of the welding method for the automobile longitudinal beam structure provided by the invention.
Referring to fig. 1 to 4, an automobile longitudinal beam structure 100 includes at least two longitudinal beam sections 1, each of the longitudinal beam sections 1 includes a bottom plate 11 and two side plates 12 disposed on opposite sides of the bottom plate 11, an end of at least one of the side plates 12 is bent to form a flanging 13, and a welding method of the automobile longitudinal beam structure 100 includes the following steps:
step S20, assembling before welding: the two longitudinal beam sections 1 are mutually lapped, so that the corresponding bottom plates 11 of the two longitudinal beam sections 1 are attached, the corresponding side plates 12 are isolated from each other, and the corresponding outward turned edges 13 are isolated from each other;
step S30, spot welding positioning: positioning the two longitudinal beam sections 1 by adopting a clamping mechanism according to a first combined arrangement strategy;
step S40, spot welding: spot welding the two longitudinal beam sections 1 by using a first welding strategy to form a primary welding longitudinal beam structure;
step S50, repair welding and positioning: positioning the initial welding longitudinal beam structure by adopting a clamping mechanism according to a second combined arrangement strategy;
step S60, repair welding: and performing repair welding on the initially welded longitudinal beam structure by using a second welding strategy to form the longitudinal beam structure.
In the welding method of the automobile longitudinal beam structure 100, the automobile longitudinal beam structure 100 is welded through pre-welding assembly, spot welding positioning, spot welding, repair welding positioning and repair welding, specifically, the two longitudinal beam sections 1 are mutually overlapped to ensure that the corresponding bottom plates 11 of the two longitudinal beam sections 1 are attached, the corresponding side plates 12 and the corresponding outward turned edges 13 are isolated from each other, a clamping mechanism is adopted to position the two longitudinal beam sections 1 according to a first combined arrangement strategy, spot welding the two longitudinal beam sections 1 by a first welding strategy to form a primary welding longitudinal beam structure, positioning the primary welding longitudinal beam structure by a clamping mechanism by a second combined arrangement strategy, and performing repair welding on the initially welded longitudinal beam structure by using a second welding strategy to form the longitudinal beam structure, so that the deformation of the longitudinal beam structure in the welding process is effectively controlled, and the welding quality is improved.
Specifically, in step S20 "pre-weld assembly: with two the mutual overlap joint of girder segment 1 to make two corresponding bottom plate 11 of girder segment 1 paste and connect, keep apart spaciously between the curb plate 12 that corresponds, keep apart spaciously between the corresponding flanging 13 step, refer to fig. 5 and fig. 6, two the interval between the curb plate 12 that girder segment 1 corresponds is L1, wherein 0mm < L1 is less than or equal to 3mm, so set up, be convenient for two the overlap joint of girder segment 1, and can be preferred guarantee two the paste of bottom plate 11 that girder segment 1 corresponds connects, it is effectual.
Specifically, in step S20 "pre-weld assembly: with two the mutual overlap joint of girder segment 1 to make two corresponding bottom plate 11 of girder segment 1 paste and connect, keep apart spaciously between the curb plate 12 that corresponds, keep apart spaciously between the outer turn-ups 13 that corresponds step, refer to fig. 5 and fig. 6, two the interval between the outer turn-ups 13 that the girder segment 1 corresponds is L2, wherein 0mm < L2 is less than or equal to 3mm, so set up, be convenient for two the overlap joint of girder segment 1, and can guarantee preferentially two the paste of the bottom plate 11 that the girder segment 1 corresponds connects, it is effectual.
Further, before step S20, the method further includes:
step S10, initial positioning: and respectively carrying out primary positioning on the two longitudinal beam sections 1 through positioning components.
It should be noted that, two are respectively positioned through the positioning assembly the girder segment 1 is initially positioned, so that two girder segments 1 are aligned, the subsequent two are convenient for the lap joint of the girder segment 1, the operation is simple, and the effect is good.
Specifically, in step S30 "spot welding positioning: adopt and press from both sides the dress mechanism and arrange tactics location two with first combination in the longeron section 1 ", first combination is arranged the tactics and is included following in the length direction of longeron section 1, make press from both sides dress mechanism 200 apart from two of overlap joint each other the distance of the welding department on the longeron section 1 is L3, and wherein, 50mm < L3 is less than or equal to 100mm, so set up, do not disturb two under the prerequisite of longeron section 1 welding, with two longeron section 1 provides and presss from both sides tightly, avoids welding deformation, effectual.
Specifically, in step S40 "spot welding: spot welding two of the stringer sections 1 with a first welding strategy to form a tack welded stringer "the first welding strategy comprising:
a1, respectively and sequentially performing spot welding on two side plates 12 corresponding to two longitudinal beam sections 1 which are mutually overlapped through a welding device along the direction departing from the bottom plate 11 so as to form a plurality of first welding points on the side plates 12 corresponding to the primary welding longitudinal beam structure, wherein in the plurality of first welding points, two adjacent first welding points are arranged in a staggered manner;
it should be noted that, in a1, when welding two corresponding curb plates 12, adopt along deviating from weld in proper order in the 11 directions of bottom plate, so set up, because two stringer section 1 corresponds bottom plate 11 pastes each other and connects, makes and is right curb plate 12 is close to during the welding of one side of bottom plate 11, upwards perk deformation can not take place for bottom plate 11, and along deviating from during the continuation welding in the direction of bottom plate 11, because two curb plate 12 and corresponding be the interval setting between curb plate 12 for deformation is to keeping away from the 11 directions of bottom plate release, avoid the welded just weld the longeron structure and appear twisting and perk, lead to the problem of the decline of precision.
a2, spot welding the two bottom plates 11 corresponding to the longitudinal beam sections 1 which are mutually overlapped through a welding device, so as to form a plurality of second welding spots on the bottom plates 11 corresponding to the primary welding longitudinal beam structure, wherein in the plurality of second welding spots, two adjacent second welding spots are arranged in a staggered manner.
It should be noted that, in a2, make a plurality of in the second solder joint, adjacent two be dislocation set between the second solder joint, so set up for the welding deformation range that two solder joints are controlled is the biggest, can reduce welding deformation effectively, avoids the welded just weld longeron structure and twist and perk appear, lead to the problem of decline of precision.
Specifically, in step S60 "repair welding: and (3) performing repair welding on the primary welding longitudinal beam structure by using a second welding strategy to form a longitudinal beam structure, wherein the second welding strategy comprises the following steps:
b1, respectively and sequentially performing spot welding on the two side plates 12 corresponding to the initially welded longitudinal beam structure by a welding device along the direction deviating from the bottom plate 11 so as to form a plurality of third welding spots on the side plates 12 corresponding to the longitudinal beam structure, wherein in the plurality of third welding spots, two adjacent third welding spots are arranged in a staggered manner;
it should be noted that, in b1, when welding two curb plates 12 that correspond, adopt along deviating from weld in proper order in the 11 directions of bottom plate, so set up, because two stringer section 1 corresponds bottom plate 11 pastes each other and connects, makes and is right curb plate 12 is close to during the welding of one side of bottom plate 11, upwards perk deformation can not take place for bottom plate 11, and along deviating from during the continuous welding in the direction of bottom plate 11, because two curb plate 12 and corresponding be the interval setting between curb plate 12 for deformation is to keeping away from the 11 directions of bottom plate release, avoid the welded just weld the longeron structure and appear twisting and perk, lead to the problem of the decline of precision.
b2, spot welding the bottom plate 11 corresponding to the initially welded longitudinal beam structure through a welding device to form a plurality of fourth welding spots on the bottom plate 11 corresponding to the longitudinal beam structure, wherein in the plurality of fourth welding spots, two adjacent fourth welding spots are arranged in a staggered manner.
It should be noted that, in b2, make a plurality of in the second solder joint, adjacent two be dislocation set between the second solder joint, so set up for the welding deformation range that two solder joints are controlled is the biggest, can reduce welding deformation effectively, avoids the welded just weld longeron structure and twist and perk appear, lead to the problem of the decline of precision.
Further, to two of overlap joint each other 11 spot welding of bottom plate that longeron section 1 corresponds accomplish the back, it is right flanging 13 carries out spot welding, so set up, avoids appearing twisting and perk, and makes just weld longeron structural weld firmly, effectual.
Further, the first welding strategy comprises: forming a plurality of first welding spots on the side plate 12 corresponding to the primary welding longitudinal beam structure through a welding device, wherein the first welding spots are arranged in a staggered manner between two adjacent first welding spots, and the second welding strategy comprises the following steps: be in through welding set the longeron structure corresponds form a plurality of third solder joints on the curb plate 12, and a plurality of in the third solder joint, adjacent two be dislocation set between the third solder joint, owing to link to each other two the straight line at first solder joint place and adjacent two the middle part of the straight line at third solder joint place is crossing setting, so sets up, can make the welding a plurality of deformation that produces during the first solder joint is a plurality of with the welding deformation that produces during the third solder joint offsets, thereby controls effectively the perk of longeron structure, it is effectual.
Further, the first welding strategy comprises: forming a plurality of second welding spots on the bottom plate 11 corresponding to the primary welding longitudinal beam structure through a welding device, wherein the second welding spots are arranged in a staggered manner between two adjacent second welding spots, and the second welding strategy comprises the following steps: be in through welding set the longeron structure corresponds form a plurality of fourth solder joints on the bottom plate 11, and a plurality of in the fourth solder joint, adjacent two be the dislocation set between the fourth solder joint, because two the straight line at second solder joint place and adjacent two the middle part at the straight line at fourth solder joint place is crossing setting, so sets up, can so that the welding is a plurality of deformation that produces during the second solder joint is a plurality of with the welding the deformation that produces during the fourth solder joint offsets, thereby controls effectively the perk of longeron structure, and is effectual.
Specifically, in the present application, the total number of the first welding spots, the second welding spots, the third welding spots and the fourth welding spots is 27, and the welding spots are distributed in 3 directions and are all near the clamping mechanism 200, so that the welding gun is not easy to operate, cannot completely weld, and is affected by the beat, the process has a mounting time, and cannot completely weld the welding spots on the premise of 40JPH, and therefore, the welding is required to be performed in sequence, referring to fig. 1, the stringer structure of the present application includes a first stringer section 1a, a second stringer section 1b and a third stringer section 1c, wherein the welding sequence of the first stringer section 1a and the second stringer section 1b is: the welding flux is d4-d2-d10-d11-d5-d8 during spot welding, and is d3-d1-d9-d12-d6-d7-d13 during repair welding. The welding sequence of the second longitudinal beam section 1b and the third longitudinal beam section 1c is as follows: the welding flux is d18-d17-d24-d27-d23-d20 during spot welding, and is d19-d16-d25-d26-d22-d21-d14-d15 during repair welding. Therefore, at least 2 welding points are arranged on each lapping surface, the two side plates 12 are welded firstly, the rear welding bottom plate 11 is best for controlling the upward tilting of the rear end of the longitudinal beam, and the welding quality is improved.
Specifically, in order to improve the positioning effect, clamping mechanisms 200 are further arranged at the middle position of the longitudinal beam section 1, which is 350mm away from the bottom surfaces of the two ends. The bottom surfaces and the flanges are arranged at the two ends of the longitudinal beam section 1 respectively, the clamping mechanisms 200 are arranged, the bottom surfaces of the middle lap joint positions are provided with the clamping mechanisms 200, and therefore the positioning welding deformation is controlled, the clamping mechanisms 200 are reduced during repair welding, the welding deformation is reduced through the welding sequence, and the requirements of welding gun trafficability, beat and cost are met.
And carrying out simulation analysis on the welding deformation of the longitudinal beam structure based on simulact software, and specifically referring to table 1.
Table 1 simulation-physical data collation by the welding method of the automobile longitudinal beam structure 100 provided in the present application:
the conclusion is reached by column 2 data (form weld-singleton difference): most of the deformation of the forming welding is within 0.5mm, and the deformation of the forming welding is small. The conclusion is drawn from column 3 data (repair-form weld difference): the deformation of repair welding is within 0.5mm, the deformation of repair welding is small, and the formability is enough. The magnitude of the simulation results (repair welding-form welding) is equivalent to the 3 rd column data (repair welding-form welding difference).
The present invention further provides a welding device, specifically, in the embodiment of the present application, the welding device welds the longitudinal beam structure by using the welding method of the automobile longitudinal beam structure 100 as described above, referring to fig. 2 to 4, the longitudinal beam section 1 structure includes at least two longitudinal beam sections 1, the welding device 1000 includes a base, a clamping mechanism 200 and a welding assembly, the clamping mechanism 200 is disposed on the base, the clamping mechanism 200 includes a supporting portion 201 and a pressing portion 202 (refer to fig. 6 and 7) disposed at an interval, a clamping space for clamping and positioning the two longitudinal beam sections 1 is formed between the supporting portion 201 and the pressing portion 202, when the longitudinal beam structure needs to be welded, the two longitudinal beam sections are located in the clamping space, positioning of the two longitudinal beam sections 1 is realized, spot welding of the two longitudinal beam sections 1 overlapped with each other is performed by the welding assembly, therefore, the structure is simple, and the welding quality is improved.
Further, referring to fig. 6 and 7, the welding device further comprises at least two sets of positioning structures, each of the positioning structures comprises a positioning pin 300 and a positioning hole which are matched with each other, the positioning pin 300 is arranged on the base, and the positioning holes are used for being arranged on the longitudinal beam section 1.
It should be noted that, in two sets of positioning structures, one of the positioning blocks is set to be square or strip-shaped, and thus, when there is a processing error, in two sets of positioning structures, after the positioning hole of one of the positioning structures is matched with the corresponding positioning pin 300, the positioning hole of the other positioning structure can still be effectively matched with the positioning pin 300, so that the universality is improved, and the effect is good.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The welding method of the automobile longitudinal beam structure is characterized by comprising the following steps of:
assembling before welding: the two longitudinal beam sections are mutually lapped, so that the corresponding bottom plates of the two longitudinal beam sections are attached, the corresponding side plates are isolated from each other, and the corresponding outward flanges are isolated from each other;
spot welding and positioning: positioning the two longitudinal beam sections by a first combined arrangement strategy by adopting a clamping mechanism;
spot welding: spot welding the two longitudinal beam sections by using a first welding strategy to form an initial welding longitudinal beam structure;
repair welding and positioning: positioning the primary welding longitudinal beam structure by adopting a clamping mechanism according to a second combined arrangement strategy;
repair welding: and performing repair welding on the initially welded longitudinal beam structure by using a second welding strategy to form the longitudinal beam structure.
2. A method of welding a vehicle rail structure according to claim 1, characterized in that the assembling before welding: and (2) overlapping two longitudinal beam sections to ensure that the bottom plates corresponding to the two longitudinal beam sections are attached, and the corresponding side plates are isolated from each other by a space and the corresponding flanges are isolated from each other by a space:
the interval between the side plates corresponding to the two longitudinal beam sections is L1, wherein the distance between the side plates is more than 0mm and less than or equal to 3mm than L1; and/or the presence of a gas in the gas,
the interval between the outward flanges corresponding to the two longitudinal beam sections is L2, wherein the distance between the outward flanges is more than 0mm and less than or equal to 3mm than L2.
3. A welding method for a vehicle side member structure according to claim 1, wherein in said "spot welding positioning: positioning two of the stringer sections "in a first combined arrangement strategy using a clamping mechanism:
the first combined arrangement strategy comprises that the distance between the clamping mechanism and the welding position on the two longitudinal beams which are mutually overlapped is L3 along the length direction of the longitudinal beam sections, wherein the distance is 50mm < L3 is less than or equal to 100 mm.
4. A method of welding a vehicle rail structure according to claim 1, characterized in that the assembling before welding: with two the mutual overlap joint of girder segment to make the bottom plate that two girder segments correspond to paste mutually and connect, keep apart the space between the curb plate that corresponds, still include before the step of keeping apart the space between the flanging that corresponds "between:
initial positioning: and respectively carrying out initial positioning on the two longitudinal beam sections through positioning components.
5. A welding method for a vehicle side member structure according to claim 1, wherein said "spot welding: in the step of spot welding two of the stringer sections with a first welding strategy to form a tack-welded stringer structure ", the first welding strategy comprises:
in the direction departing from the bottom plate, two side plates corresponding to two longitudinal beam sections which are mutually overlapped are respectively subjected to spot welding in sequence through a welding device so as to form a plurality of first welding spots on the side plates corresponding to the initially welded longitudinal beam structure, wherein in the plurality of first welding spots, two adjacent first welding spots are arranged in a staggered manner;
and spot welding is carried out on the bottom plates corresponding to the two longitudinal beam sections which are mutually overlapped through a welding device, so that a plurality of second welding spots are formed on the bottom plates corresponding to the initially welded longitudinal beam structures, wherein in the plurality of second welding spots, every two adjacent second welding spots are arranged in a staggered mode.
6. A welding method for a vehicle side member structure according to claim 1, wherein said "repair welding: and in the step of repair welding the initially welded longitudinal beam structure by a second welding strategy to form the longitudinal beam structure ", the second welding strategy comprises the following steps:
in the direction departing from the bottom plate, spot welding is sequentially carried out on two side plates corresponding to the initially welded longitudinal beam structure through a welding device respectively so as to form a plurality of third welding spots on the side plates corresponding to the longitudinal beam structure, wherein in the plurality of third welding spots, two adjacent third welding spots are arranged in a staggered manner;
and spot welding is carried out on the bottom plate corresponding to the initially welded longitudinal beam structure through a welding device, so that a plurality of fourth welding spots are formed on the bottom plate corresponding to the longitudinal beam structure, wherein in the plurality of fourth welding spots, two adjacent fourth welding spots are arranged in a staggered manner.
7. A method of welding a vehicle rail structure as defined in claim 1, wherein the first welding strategy comprises: forming a plurality of first welding points on the side plate corresponding to the primary welding longitudinal beam structure through a welding device, wherein in the plurality of first welding points, two adjacent first welding points are arranged in a staggered manner;
the second welding strategy comprises: forming a plurality of third welding points on the side plate corresponding to the longitudinal beam structure through a welding device, wherein in the plurality of third welding points, two adjacent third welding points are arranged in a staggered manner;
the middle parts of the straight lines where the two connected first welding spots are located and the straight lines where the two adjacent third welding spots are located are intersected.
8. A method of welding a vehicle rail structure as defined in claim 1, wherein the first welding strategy comprises: forming a plurality of second welding spots on the bottom plate corresponding to the primary welding longitudinal beam structure through a welding device, wherein two adjacent second welding spots in the plurality of second welding spots are arranged in a staggered manner;
the second welding strategy comprises: forming a plurality of fourth welding spots on the bottom plate corresponding to the longitudinal beam structure through a welding device, wherein in the plurality of fourth welding spots, two adjacent fourth welding spots are arranged in a staggered manner;
the middle parts of the straight lines of the two second welding spots and the straight lines of the two adjacent fourth welding spots are intersected.
9. A welding device for welding a longitudinal beam structure, said longitudinal beam segment structure comprising at least two longitudinal beam segments, characterized in that the welding device comprises:
a base;
the clamping mechanism is arranged on the base and comprises supporting parts and pressing parts which are arranged at intervals, and a clamping space for clamping and positioning the two longitudinal beam sections is formed between the supporting parts and the pressing parts; and the number of the first and second groups,
and the welding assembly is used for carrying out spot welding on the two longitudinal beam sections which are mutually overlapped.
10. The welding device of claim 9, further comprising at least two sets of positioning structures, each positioning structure comprising a positioning pin and a positioning hole that mate with each other, the positioning pin being disposed on the base, and the positioning hole being configured to be disposed on the beam section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210765162.9A CN115041796A (en) | 2022-06-30 | 2022-06-30 | Welding method and welding device for automobile longitudinal beam structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210765162.9A CN115041796A (en) | 2022-06-30 | 2022-06-30 | Welding method and welding device for automobile longitudinal beam structure |
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| CN115041796A true CN115041796A (en) | 2022-09-13 |
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Application publication date: 20220913 |