CN114309941A - Combined tool and method for metal sheet structure edge-curling welding construction - Google Patents
Combined tool and method for metal sheet structure edge-curling welding construction Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 16
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
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Abstract
The invention relates to a combined tool and a method for the construction of the edge-curling welding of a metal sheet structure, wherein the construction method comprises the following steps: s1, placing two fixing devices at two ends of a folded edge joint metal sheet butted by the metal sheet groove type module, and flatly aligning and fixing the butted folded edge joint metal sheet; s2, placing the supporting pull rod between the flanging joints of the metal sheet groove-shaped module, tightly supporting the butted flanging joints to reduce the gap of the metal sheets and adjusting the straightness of the butted flanging joints; and S3, sleeving the handheld/automatic welding gun into a welding gun sleeve of the handheld/automatic welding auxiliary tool, clamping the riding fork on the butted flanged joint metal sheet, and riding and welding the welding gun sleeved with the handheld/automatic welding auxiliary tool along a butting straight line. The welding gun has the advantages of being used for the edge rolling welding construction of a handheld/automatic welding gun of a large metal sheet structure, small in butt joint clearance, good in straightness, good in flatness of butt joint metal sheets, high in edge rolling welding speed and good in stability.
Description
Technical Field
The invention relates to the technical field of laser welding, in particular to a combined tool and a method for the construction of metal sheet structure edge-curling welding.
Background
In the technical fields of ocean cargo ships, spaceflight, liquid cargo tanks for storage and the like, a structure for storing liquid cargo needs to be formed by welding metal thin plate curled edges, and the liquid cargo tanks are large in size and high in personalized design requirements, so that the curled edges are generally welded by using a handheld/automatic welding gun. Fig. 6 is a schematic view of a sheet metal structure docking module. As shown in fig. 6, the large-scale metal thin plate structure is mainly formed by welding a plurality of metal thin plate groove type modules in a curling mode. Fig. 7 is a schematic view of the position of the edge-curl welding of the sheet metal structure. As shown in fig. 7, the opposite sides of the metal sheet trough-shaped modules comprise flanged joints with the same width, the metal sheets of the butted flanged joints at the butted positions of the two metal sheet trough-shaped modules are L-shaped curled edges with equal height and symmetry, and the butted flanged joints at the welded positions of the metal sheet trough-shaped modules are close to the butted straight lines at the tops of the metal sheets; the butt welding seam of the finished product structure is positioned on the inner side and used for containing liquid goods, and the outer side of the finished product structure is relatively smooth and used for paving a shielding layer and a heat insulation layer. For the low temperature resistant subzero occasions, the metal sheet is made of 304 stainless steel, and the welding process requires that the fusion depth is more than 0.8 mm. In the prior art, the edge rolling welding of the metal sheet groove type module adopts argon arc welding, the gap of butted metal sheets is required to be less than 0.2 mm by an argon arc welding process, a plurality of fixed points are welded on a butted straight line every 10 cm during construction, and then the edge rolling welding is carried out along the butted straight line by using a handheld/automatic argon arc welding gun; according to the welding construction method, the gap between the butted metal sheets is not easy to control, the flatness of the positions between the butted metal sheets is not enough (caused by the misaligned butted metal sheets), the welding depth is inconsistent, the welding speed is low, and the stability is poor.
Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding can be achieved by using a continuous or pulsed laser beam, and the principle of laser welding can be divided into heat conduction type welding and laser deep fusion welding. The power density is less than 104-105W/cm2The welding is heat conduction welding, and the welding depth is shallow and the welding speed is slow; the power density is more than 105-107W/cm2When the method is used, the metal surface is recessed into 'holes' under the action of heat to form deep fusion welding, and the method has the characteristics of high welding speed and large depth-to-width ratio. Laser welding technological parameters are as follows: 1. power density, which is one of the most critical parameters in laser machining; 2. laser pulse shape, especially for thin sheet welding; 3. laser pulse width; 4. defocusing amount, wherein the power density distribution is relatively uniform on each plane away from the laser focus, and the defocusing modes are two types: the method comprises the following steps of (1) carrying out positive defocusing and negative defocusing, wherein when the required penetration depth is larger, the negative defocusing is adopted, and when a thin material is welded, the positive defocusing is adopted; 5. the welding speed, the speed of the welding speed can influence the heat input amount in unit time.
The invention improves the design of the metal sheet structure hemming welding construction.
Disclosure of Invention
The invention aims to provide a combined tool which is used for the edge rolling welding construction of a handheld/automatic welding gun of a metal sheet structure, has small butt joint clearance and good linearity, can ensure good flatness of a butt-jointed metal sheet, and can realize high edge rolling welding speed and good stability.
In order to achieve the purpose, the technical scheme adopted by the invention is a metal sheet structure hemming welding construction combination tool, wherein the metal sheet structure comprises a plurality of square metal sheet groove type modules, the opposite sides of the metal sheet groove type modules comprise hemming joints with the same width, the butt joint parts of the two metal sheet groove type modules are L-shaped hems with equal height and symmetry, the butt joint parts of the metal sheets of the hemming joints form a butt joint straight line, and the butt joint straight line forms a butt joint plane towards the extending direction of the metal sheets of the hemming joints; the combined tool comprises fixing devices which are arranged at two ends of a flanged joint metal sheet butted by a metal sheet groove type module and are used for flatly aligning the butted flanged joint metal sheet; the support pull rod is arranged between the flanging joints of the metal sheet groove-shaped module and used for reducing the gap of the butted flanging joint metal sheets and adjusting the straightness of the butted flanging joint metal sheets; the auxiliary tool comprises a welding gun sleeve which is sleeved on the handheld/automatic welding gun head and is provided with a riding fork, and the riding fork is used for clamping a welding gun sleeved with the handheld/automatic welding auxiliary tool on a butted flanging joint metal sheet and riding along a butting straight line.
Preferably, the fixing device comprises two fixing hinges, a fixed flush joint and two fixing screws, wherein the fixed flush joint is positioned between the two hinges and matched with the butted folded edge joint metal thin plates, the outer side and the bottom side of the fixed flush joint are slotted, the upper side and the inner side of the fixed flush joint are sealed, screw holes are formed in the fixing hinges, and the fixing screws are used for fixing the butted folded edge joint metal thin plates in the flush joint through the screw holes.
Preferably, the fixing device further comprises an operation hook and an operation pipe, the operation hook extends from the fixing hinge and is used for being hung on the operation pipe to move, and the length of the operation pipe is convenient for the fixing device to move in the range of the metal sheet structure for operation.
Preferably, the support pull rod comprises a first pull rod, a second pull rod, a flat plate positioned at the first ends of the first pull rod and the second pull rod, and a handle positioned between the second ends of the first pull rod and the second pull rod and extended out in a spiral combination manner, and the first pull rod and the second pull rod can be screwed in or out to control the length of the support pull rod in the spiral combination manner.
Preferably, the second end of the first pull rod is provided with a left-handed external thread, and the first end of the first pull rod in threaded combination is provided with a left-handed internal thread; the second end of the second pull rod is provided with a right-handed external thread, and the spiral combined second end is provided with a right-handed internal thread.
Preferably, the riding fork comprises a tapered bayonet portion at the inner side, the width of which matches the thickness of the butted hemmed joint sheet metal, and a snap-in portion at the outer side, the width of which continuously tapers from the thickness of the butted hemmed joint sheet metal to a size of the butted hemmed joint sheet metal for facilitating snap-in.
The invention further aims to provide a construction method which is used for the edge rolling welding construction of the metal sheet structure by the handheld/automatic welding gun, has small butt joint clearance, good linearity and good flatness of the butt joint metal sheet, and realizes high edge rolling welding speed and good stability.
In order to achieve the above another object, the present invention provides a method for performing a seam welding operation on a sheet metal structure, which is based on the above-mentioned combined tool for performing a seam welding operation on a sheet metal structure, and comprises the following steps:
s1, placing two fixing devices at two ends of a folded edge joint metal sheet butted by the metal sheet groove type module, and flatly aligning and fixing the butted folded edge joint metal sheet;
s2, placing the supporting pull rod between the flanging joints of the metal sheet groove-shaped module, tightly supporting the butted flanging joints to reduce the gap of the metal sheets and adjusting the straightness of the butted flanging joints;
and S3, sleeving the handheld/automatic welding gun into a welding gun sleeve of the handheld/automatic welding auxiliary tool, clamping the riding fork on the butted flanged joint metal sheet, and riding and welding the welding gun sleeved with the handheld/automatic welding auxiliary tool along a butting straight line.
Preferably, argon arc welding is adopted, and the gap between the metal sheets in the step S2 is less than 0.2 mm; or laser welding is adopted, and the gap of the metal sheet is smaller than 0.1 mm in the step S2.
Preferably, the hand-held/automatic welding auxiliary tool is a hand-held/automatic laser welding auxiliary tool, and the hand-held/automatic laser welding auxiliary tool further comprises a welding wire through hole arranged below the welding gun sleeve and a riding fork arranged below the welding wire through hole; when the handheld/automatic laser welding butt joint operation is carried out, laser rays pass through the central axis of the welding gun sleeve, and a welding wire line is formed by welding wires passing through the welding wire through holes and is intersected with the laser rays at a welding spot; the welding point connecting line forms a defocusing straight line which is positioned above the butt joint straight line and is parallel to the butt joint straight line, and the laser ray, the welding wire line and the defocusing straight line are positioned on the butt joint plane.
Preferably, during the handheld/automatic laser welding butt joint operation, the included angle between the welding wire line and the butt joint straight line is a welding wire included angle which is 15 degrees, the included angle between the laser ray and the butt joint straight line is a laser included angle which is 45 degrees; the distance between the out-of-focus straight line and the butt joint straight line is out-of-focus distance, and the out-of-focus distance is half of the thickness of the metal sheet of the folding joint.
Preferably, the curled metal sheet is a stainless steel sheet with a thickness of 0.8-2 mm, the gap of the metal sheet in the step S2 is less than 0.1 mm, and the diameter of the welding wire is 0.8-2 mm.
Preferably, based on the aforesaid including the branching bayonet part of riding and the metal sheet structure hem welding construction combination tool of portion of going into of card, the hem connects metal sheet to be the stainless steel board that thickness is 1 millimeter, the welding wire diameter is 1 millimeter, welding wire through-hole diameter is 1.2 millimeters, the branching bayonet part of riding entry width is 2.3 millimeters, the branching bayonet part width of riding is from 2.3 millimeters continuous gradual change to 2.5 millimeters.
The invention discloses a combined tool and a method for the construction of the edge-curling welding of a metal sheet structure, which have the beneficial effects that: 1. the butt joint clearance and the straightness are controlled through the supporting pull rod, the straightness of butt joint edges is guaranteed while the gap is reduced, the straight walking during welding is facilitated, the flatness of the butt joint metal sheet is controlled through the fixing device, the edge curling welding speed is high, the stability is good through the handheld/automatic welding auxiliary tool, the handheld/automatic welding gun edge curling welding construction quality of the metal sheet structure is guaranteed due to the fact that the handheld/automatic welding gun edge curling welding construction quality is related and matched with the handheld/automatic welding gun edge curling welding construction quality of the metal sheet structure; 2. the structural design of the riding forked bayonet part and the clamping part is convenient for clamping the handheld/automatic welding auxiliary tool into the metal sheet and stably riding; 3. the optimal welding wire included angle, laser included angle and defocusing distance further ensure the quality of butt welding laser of the metal sheets by the handheld/automatic laser welding gun; 4. the butt-joint laser welding process for the flanged joint 304 stainless steel plate with the thickness of 1 mm is more suitable for the laser welding operation of a metal sheet structure for a liquid cargo storage cabin and a storage tank of an LNG (liquefied natural gas) ship.
[ description of the drawings ]
Fig. 1 is a perspective view of a millimeter-scale metal sheet butt laser welding auxiliary tool.
FIG. 2 is a schematic diagram of the welding operation state of the auxiliary tool for butt laser welding of millimeter-sized metal sheets.
FIG. 3 is a side view of a welding operation state of an auxiliary tool for butt laser welding of millimeter-sized metal sheets.
FIG. 4 is a schematic cross-sectional view of a millimeter-sized sheet metal butt laser welding auxiliary tool.
Fig. 5 is a partially enlarged schematic view of a millimeter-sized sheet metal butt laser welding auxiliary tool.
Fig. 6 is a schematic view of a sheet metal structure docking module.
Fig. 7 is a schematic view of the position of the edge-curl welding of the sheet metal structure.
FIG. 8 is a schematic view of a tool assembly for a sheet metal seam welding operation.
FIG. 9 is a schematic view of a fixing device for a metal sheet structured hemming welding tool.
FIG. 10 is a schematic view of a support rod structure of a combined tool for a sheet metal structure hemming welding construction.
FIG. 11 is a schematic view of a support rod of a combination tool for a sheet metal structure for hemming welding construction.
FIG. 12 is a step diagram of a construction method for welding the hemmed edge of the sheet metal structure.
The reference numerals and components referred to in the drawings are as follows: 1. welding machine copper nozzle, 11, welding gun sleeve, 12, welding wire through hole and riding fork combination, 121, welding wire through hole, 122, riding fork, 1221, bayonet part, 1222, clamping part, 2, laser ray, 21, laser included angle, 23, welding point, 3, welding wire line, 31, welding wire included angle, 4, butt joint straight line, 41, butt joint plane, 5, metal sheet, 6, out-of-focus straight line, 61, out-of-focus distance, 7, riding included angle, 81, fixing hinge, 82, fixing screw, 83 aligning seam, 84, operation hook, 85, operation pipe, 91, first pull rod, 92, spiral combination, 93, second pull rod, 94, flat plate, 95 and handle.
[ detailed description ] embodiments
The invention is further described with reference to the following examples and with reference to the accompanying drawings.
Example 1
This embodiment realizes a millimeter level sheet metal butt joint laser welding appurtenance.
Fig. 1 is a perspective view of a millimeter-scale metal sheet butt laser welding auxiliary tool. As shown in the attached drawing 1, the millimeter-scale metal sheet butt-joint laser welding auxiliary tool of the embodiment is used for realizing rapid and stable operation when the handheld/automatic laser welding gun matched auxiliary tool is used for carrying out the butt-joint laser welding of the millimeter-scale metal sheet through the welding gun sleeve, the welding wire through hole, the riding forked structure and the mutual size matching.
FIG. 2 is a schematic diagram of the welding operation state of the auxiliary tool for butt laser welding of millimeter-sized metal sheets. As shown in fig. 2, in the millimeter-scale metal sheet butt-joint laser welding auxiliary tool according to the embodiment, a butt-joint straight line is formed at a butt-joint position of metal sheets, and a butt-joint plane is formed by the butt-joint straight line in a direction in which the metal sheets extend; the laser welding gun comprises a welding gun sleeve sleeved on a handheld/automatic laser welding gun head, wherein a laser ray passes through the central axis of the welding gun sleeve; the welding gun sleeve is provided with a welding gun sleeve, and a welding wire and a laser ray are formed through welding wires of the welding gun sleeve to intersect at a welding spot; the welding wire device further comprises a riding fork arranged below the welding wire through hole, wherein the riding fork is used for clamping a handheld/automatic laser welding gun of the sleeving auxiliary tool on the butted metal sheets and riding along a butting straight line; during millimeter level sheet metal butt joint laser welding operation, the solder joint line forms out of focus straight line and is located butt joint straight line top, and be on a parallel with the butt joint straight line, laser ray, welding wire line and out of focus straight line are located the butt joint plane.
FIG. 3 is a side view of a welding operation state of an auxiliary tool for butt laser welding of millimeter-sized metal sheets. As shown in the attached drawing 3, preferably, when the millimeter-scale metal thin plate is butted and welded, the welding wire line and the included angle of the butted straight line are welding wire included angles which are 10-20 degrees, the laser ray and the included angle of the butted straight line are laser included angles which are 40-50 degrees.
Preferably, the welding wire included angle is 15 degrees, and the laser included angle is 45 degrees.
Preferably, the distance between the defocusing straight line and the butt joint straight line is a defocusing distance, and the defocusing distance is half of the thickness of the metal sheet.
Preferably, the riding fork comprises a tapered bayonet portion at the inner side with a width matching the butt metal sheet thickness, and a snap-in portion at the outer side with a width continuously tapering from the butt metal sheet thickness matching dimension to a size facilitating snap-in of the butt metal sheet.
Example 2
This embodiment realizes a millimeter level sheet metal butt joint laser welding appurtenance. The application scenario that this implementation millimeter level sheet metal butt joint laser welding appurtenance's technical scheme aims at is: during millimeter level sheet metal butt joint laser welding operation, butt joint sheet metal is two 304 corrosion resistant plate that thickness is 1 millimeter, two 304 corrosion resistant plate clearances are less than 0.1 millimeter, the welding wire diameter is 1 millimeter. Other technical details and component composition are the same as those of embodiment 1. The millimeter-scale metal sheet butt joint laser welding auxiliary tool is designed for adaptive size structures of two 304 stainless steel plates with the thickness of 1 millimeter, and is more suitable for butt joint laser welding of metal sheets of structures for a liquid cargo storage cabin and a storage tank of an LNG ship (liquefied natural gas ship).
FIG. 4 is a schematic cross-sectional view of a millimeter-sized sheet metal butt laser welding auxiliary tool. As shown in the attached drawing 4, the millimeter-scale metal sheet butt-joint laser welding auxiliary tool is a welding machine copper nozzle which is formed by connecting a nut on a welding gun sleeve, a welding wire through hole and a bolt on a riding fork assembly. Preferably, the riding included angle is a riding included angle formed by the top surface of the riding forked clamping part and the extension direction of the central axis of the welding gun sleeve, and the riding included angle is 70 degrees.
Fig. 5 is a partially enlarged schematic view of a millimeter-sized sheet metal butt laser welding auxiliary tool. As shown in fig. 5, preferably, the diameter of the welding wire through hole is 1.2 mm, the entrance width of the riding fork bayonet part is 2.3 mm, and the width of the riding fork bayonet part is continuously gradually changed from 2.3 mm to 2.5 mm.
Example 3
The embodiment realizes a large-scale metal sheet structure hemming welding construction combination tool. The utility model provides a large-scale sheet metal structure hem welding construction combination tool passes through support pull rod control butt joint clearance and straightness accuracy, when reducing the gap, has guaranteed the straightness accuracy of butt joint "limit", and the straight line walking when being convenient for weld controls butt joint sheet metal roughness through fixing device, and it is fast, stable good to realize the hem welding speed through handheld automatic welding appurtenance, and the mutual correlation, the mutually supporting between the three ensures the handheld automatic welder hem welding construction quality of large-scale sheet metal structure.
FIG. 8 is a schematic view of a tool assembly for a sheet metal seam welding operation. As shown in fig. 8, the combined tool for the hemming welding construction of a sheet metal structure according to the present embodiment includes a plurality of square sheet metal groove modules, where the opposite sides of the sheet metal groove modules include hemming joints with the same width, the butt joint of the two sheet metal groove modules is an L-shaped hemming with equal height symmetry, the butt joint of the hemming joints forms a straight line, and the straight line forms a butt joint plane towards the extending direction of the hemming joint sheet metal; the combined tool comprises fixing devices which are arranged at two ends of a flanged joint metal sheet butted by a metal sheet groove type module and are used for flatly aligning the butted flanged joint metal sheet; the support pull rod is arranged between the flanging joints of the metal sheet groove-shaped module and used for reducing the gap of the butted flanging joint metal sheets and adjusting the straightness of the butted flanging joint metal sheets; the auxiliary tool comprises a welding gun sleeve which is sleeved on the handheld/automatic welding gun head and is provided with a riding fork, and the riding fork is used for clamping a welding gun sleeved with the handheld/automatic welding auxiliary tool on a butted flanging joint metal sheet and riding along a butting straight line.
FIG. 9 is a schematic view of a fixing device for a metal sheet structured hemming welding tool. As shown in fig. 9, preferably, the fixing device includes two fixing hinges, a positioning flush joint and two fixing screws, the positioning flush joint is located between the two hinges and matched with the butted flanged joint metal thin plates, the outer side and the bottom side of the positioning flush joint are slotted, the upper side and the inner side of the positioning flush joint are sealed, screw holes are formed in the fixing hinges, and the fixing screws fix the flanged joint metal thin plates butted in the positioning flush joint through the screw holes.
Preferably, the fixing device further comprises an operation hook and an operation pipe, the operation hook extends from the fixing hinge and is used for being hung on the operation pipe to move, and the length of the operation pipe is convenient for the fixing device to move in the range of the metal sheet structure for operation.
FIG. 10 is a schematic view of a support rod structure of a combined tool for a sheet metal structure hemming welding construction. As shown in fig. 10, preferably, the support rod includes a first rod, a second rod, a plate located at a first end of the first rod and a first end of the second rod, and a handle located between a second end of the first rod and a second end of the second rod and extending from the first rod and the second rod through screw coupling, and the first rod and the second rod can be screwed in or out of the screw coupling to control the length of the support rod.
FIG. 11 is a schematic view of a support rod of a combination tool for a sheet metal structure for hemming welding construction. As shown in fig. 11, preferably, the second end of the first pull rod is provided with M27x2 left-handed external threads with the length of 30mm, and the first end of the first pull rod is provided with M27x2 left-handed internal threads with the depth of 40 mm; the second end of the second pull rod is provided with a right-handed external thread with the length of M27x2 and the length of 30mm, and the spiral combination second end is provided with a right-handed internal thread with the depth of 40mm and the length of M27x 2.
Preferably, the riding fork comprises a tapered bayonet portion at the inner side, the width of which matches the thickness of the butted hemmed joint sheet metal, and a snap-in portion at the outer side, the width of which continuously tapers from the thickness of the butted hemmed joint sheet metal to a size of the butted hemmed joint sheet metal for facilitating snap-in.
Example 4
The embodiment realizes a metal sheet structure edge-curling welding construction method. The metal sheet structure edge-rolling welding construction method is suitable for argon arc welding and laser welding; and the quality of the butt-joint laser welding of the metal sheets by the handheld/automatic laser welding gun is further ensured through the optimized welding wire included angle, laser included angle and defocusing distance; meanwhile, the butt-joint laser welding process for the flanged joint 304 stainless steel plate with the thickness of 1 mm is more suitable for the laser welding operation of the metal sheet structure for the liquid cargo storage cabin and the storage tank of the LNG carrier (liquefied natural gas carrier).
FIG. 12 is a step diagram of a method for welding the edge of the sheet metal structure. As shown in fig. 12, a sheet metal structure hemming welding construction method according to the present embodiment is a sheet metal structure hemming welding construction combination tool according to embodiment 3, and includes the following steps:
s1, placing two fixing devices at two ends of a folded edge joint metal sheet butted by the metal sheet groove type module, and flatly aligning and fixing the butted folded edge joint metal sheet;
s2, placing the supporting pull rod between the flanging joints of the metal sheet groove-shaped module, tightly supporting the butted flanging joints to reduce the gap of the metal sheets and adjusting the straightness of the butted flanging joints;
and S3, sleeving the handheld/automatic welding gun into a welding gun sleeve of the handheld/automatic welding auxiliary tool, clamping the riding fork on the butted flanged joint metal sheet, and riding and welding the welding gun sleeved with the handheld/automatic welding auxiliary tool along a butting straight line.
Preferably, argon arc welding is adopted, and the gap between the metal sheets in the step S2 is less than 0.2 mm; or laser welding is adopted, and the gap of the metal sheet is smaller than 0.1 mm in the step S2.
Preferably, the hand-held/automated welding aide is the hand-held/automated laser welding aide of embodiment 1 or embodiment 2; the handheld/automatic laser welding auxiliary tool further comprises a welding wire through hole arranged below the welding gun sleeve and a riding fork arranged below the welding wire through hole; when the handheld/automatic laser welding butt joint operation is carried out, laser rays pass through the central axis of the welding gun sleeve, and a welding wire line is formed by welding wires passing through the welding wire through holes and is intersected with the laser rays at a welding spot; the welding point connecting line forms a defocusing straight line which is positioned above the butt joint straight line and is parallel to the butt joint straight line, and the laser ray, the welding wire line and the defocusing straight line are positioned on the butt joint plane.
Preferably, during the handheld/automatic laser welding butt joint operation, the included angle between the welding wire line and the butt joint straight line is a welding wire included angle which is 15 degrees, the included angle between the laser ray and the butt joint straight line is a laser included angle which is 45 degrees; the distance between the out-of-focus straight line and the butt joint straight line is out-of-focus distance, and the out-of-focus distance is half of the thickness of the metal sheet of the folding joint.
Preferably, the L-shaped curled metal sheet is a 304 stainless steel sheet with a thickness of 0.8-2 mm, the gap of the metal sheet in the step S2 is less than 0.1 mm, and the diameter of the welding wire is 0.8-2 mm.
Preferably, based on the sheet metal structure hem welding construction combination tool of above-mentioned embodiment 3 including bayonet portion and card income portion, the hem connects the sheet metal to be the stainless steel board that thickness is 1 millimeter, the welding wire diameter is 1 millimeter, the welding wire through-hole diameter is 1.2 millimeters, the forked bayonet portion entry width of riding is 2.3 millimeters, the forked card income portion width of riding is from 2.3 millimeters continuous gradual change to 2.5 millimeters. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (10)
1. A combined tool for the hemming welding construction of a metal sheet structure comprises a plurality of square metal sheet groove-shaped modules, wherein the opposite sides of the metal sheet groove-shaped modules comprise hemming joints with the same width, the butt joint of the two metal sheet groove-shaped modules is an L-shaped hemming with equal height symmetry, the butt joint of the hemming joints and metal sheets forms a butt joint straight line, and the butt joint straight line forms a butt joint plane towards the extending direction of the hemming joints and the metal sheets; the method is characterized in that: the combined tool comprises fixing devices which are arranged at two ends of a flanged joint metal sheet butted by a metal sheet groove type module and are used for flatly aligning the butted flanged joint metal sheet; the support pull rod is arranged between the flanging joints of the metal sheet groove-shaped module and used for reducing the gap of the butted flanging joint metal sheets and adjusting the straightness of the butted flanging joint metal sheets; the auxiliary tool comprises a welding gun sleeve which is sleeved on the handheld/automatic welding gun head and is provided with a riding fork, and the riding fork is used for clamping a welding gun sleeved with the handheld/automatic welding auxiliary tool on a butted flanging joint metal sheet and riding along a butting straight line.
2. The sheet metal structure hem welding construction combination tool of claim 1, wherein: the fixing device comprises two fixing hinges, a fixed flush joint and two fixing screws, wherein the fixed flush joint is positioned between the two hinges and matched with the butted hem joint metal thin plates, the outer side and the bottom side of the fixed flush joint are slotted, the upper side and the inner side of the fixed flush joint are sealed, the fixing hinges are provided with screw holes, and the fixing screws are used for fixing the butted hem joint metal thin plates in the flush joint through the screw holes.
3. The sheet metal structure hem welding construction combination tool of claim 2, wherein: the fixing device further comprises an operation hook and an operation pipe, the operation hook extends out of the fixing hinge, the operation hook is used for being hung on the operation pipe to move, and the length of the operation pipe is convenient for the fixing device to move in the metal sheet structure range for operation.
4. The sheet metal structure hem welding construction combination tool of claim 1, wherein: the support pull rod comprises a first pull rod, a second pull rod, a flat plate positioned at the first end of the first pull rod and the first end of the second pull rod, and a handle which is positioned between the second end of the first pull rod and the second end of the second pull rod and extends out in a spiral combination mode.
5. The sheet metal structure hem welding construction combination tool of claim 4, wherein: the second end of the first pull rod is provided with a left-handed external thread, and the first end of the first pull rod in a spiral combination mode is provided with a left-handed internal thread; the second end of the second pull rod is provided with a right-handed external thread, and the spiral combined second end is provided with a right-handed internal thread.
6. The sheet metal structure hem welding construction combination tool of claim 1, wherein: the riding fork comprises a gradually narrowed bayonet part which is positioned at the inner side and has width matched with the thickness of the butted folded edge joint metal sheet, and a clamping part which is positioned at the outer side and has width continuously gradually changed from the thickness matched size of the butted folded edge joint metal sheet to the size of the butted folded edge joint metal sheet, so that the folded edge joint metal sheet can be clamped conveniently.
7. A metal sheet structure edge-curling welding construction method is based on a metal sheet structure edge-curling welding construction combination tool of any claim from 1 to 5, and is characterized by comprising the following steps:
s1, placing two fixing devices at two ends of a folded edge joint metal sheet butted by the metal sheet groove type module, and flatly aligning and fixing the butted folded edge joint metal sheet;
s2, placing the supporting pull rod between the flanging joints of the metal sheet groove-shaped module, tightly supporting the butted flanging joints to reduce the gap of the metal sheets and adjusting the straightness of the butted flanging joints;
and S3, sleeving the handheld/automatic welding gun into a welding gun sleeve of the handheld/automatic welding auxiliary tool, clamping the riding fork on the butted flanged joint metal sheet, and riding and welding the welding gun sleeved with the handheld/automatic welding auxiliary tool along a butting straight line.
8. The sheet metal structure hem welding construction method according to claim 7, characterized in that: the handheld/automatic welding auxiliary tool is a handheld/automatic laser welding auxiliary tool, and the handheld/automatic laser welding auxiliary tool further comprises a welding wire through hole arranged below the welding gun sleeve and a riding fork arranged below the welding wire through hole; when the handheld/automatic laser welding butt joint operation is carried out, laser rays pass through the central axis of the welding gun sleeve, and a welding wire line is formed by welding wires passing through the welding wire through holes and is intersected with the laser rays at a welding spot; the welding point connecting line forms a defocusing straight line which is positioned above the butt joint straight line and is parallel to the butt joint straight line, and the laser ray, the welding wire line and the defocusing straight line are positioned on the butt joint plane.
9. The sheet metal structure hem welding construction method according to claim 8, characterized in that: when the handheld/automatic laser welding butt joint operation is carried out, the included angle between the welding wire line and the butt joint straight line is a welding wire included angle which is 15 degrees, the included angle between the laser ray and the butt joint straight line is a laser included angle which is 45 degrees; the distance between the out-of-focus straight line and the butt joint straight line is out-of-focus distance, and the out-of-focus distance is half of the thickness of the metal sheet of the folding joint.
10. The sheet metal structure hem welding construction method of claim 9, wherein: the curled edge metal sheet is a stainless steel plate with the thickness of 0.8-2 mm, the gap of the metal sheet in the step S2 is smaller than 0.1 mm, and the diameter of the welding wire is 0.8-2 mm.
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