CN110757019A - Step-by-step combined welding structure and welding method for rectangular frame with large length-width ratio - Google Patents
Step-by-step combined welding structure and welding method for rectangular frame with large length-width ratio Download PDFInfo
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- CN110757019A CN110757019A CN201911185942.0A CN201911185942A CN110757019A CN 110757019 A CN110757019 A CN 110757019A CN 201911185942 A CN201911185942 A CN 201911185942A CN 110757019 A CN110757019 A CN 110757019A
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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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
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- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
The invention discloses a step-by-step combined welding structure of a rectangular frame with a large length-width ratio and a welding method thereof, which solve the problems that the rectangular steel plate frame with the large length-width ratio is easy to deform and the welding seam is difficult to detect. The method comprises the steps of firstly welding and combining a rectangular left side plate (3) of a frame and two connected square stand columns (8) into an edge side integrated plate, then combining the edge side integrated plate with a long-strip-shaped front side plate (1) and a long-strip-shaped rear side plate (2), carrying out vacuum electron beam welding on the long-strip-shaped front and rear side plates and the edge side integrated plate after the combination is completed, and finally setting fillet welds (21) between an inner horizontal plane (18) at the rear of each stand column and the long-strip-shaped rear side plate (2). According to the invention, the butt welding part of the thin-wall steel plate with a large length-width ratio is provided with the connecting square upright column with the special-shaped cross section, the vacuum electron beam welding is used for replacing the traditional manual argon arc welding, the fillet weld is only reserved at the inner side corner, and the arrangement of the special-shaped connecting column also greatly facilitates the detection of weld flaw detection.
Description
Technical Field
The invention relates to a box body welded by steel plates, in particular to a step-by-step combined welding structure of a rectangular frame welded by steel plates with large length-width ratio and a welding method thereof.
Background
The shell of some products is a rectangular box structure, the rectangular box is formed by combining a rectangular frame, a top plate and a bottom plate, wherein the rectangular frame is formed by splicing and welding two rectangular steel plates and two square steel plates, the splicing and welding are generally carried out in a manual groove welding mode, a V-shaped welding groove is machined at the splicing position of the two steel plates, then an argon arc welding machine is used for carrying out surfacing welding at the groove, a large amount of heat can be input at the surfacing welding position in the welding process, the heat can deform the steel plates through the conduction of the thin-wall steel plates, and particularly for the frame with a large length-width ratio formed by splicing the thin-wall steel plates, the phenomenon that the steel plates deform during welding is particularly serious; in order to overcome this problem, the welding site also adopts a cross-sectional welding mode to overcome the welding deformation of the thin steel plates, but when the length and width of the steel plates are large, for example: when the length-width ratio is larger than 8:1 and the wall thickness of the steel plate is about 7 mm, the cross sectional welding mode can control the deformation of the steel plate to a certain extent, but can not meet the production requirement of frame products with higher welding deformation requirements; in order to reduce the input of welding heat and overcome the deformation of thin steel plates with large length-width ratio, a welding scheme of vacuum electron beam welding is also adopted, an electron beam welding interface of each steel plate is firstly processed, four steel plates are spliced into a rectangular frame and then are placed into a vacuum chamber, because the vacuum electron beam welding is to sequentially carry out vacuum electron beam welding on four welding seams by operating an electron beam gun head, when the first welding seam is welded, the requirement that two steel plates which are in butt welding well keep a 90-degree included angle cannot be ensured, the phenomenon that the rectangular frame is changed into a diamond frame after the welding is finished often caused, and the welded frame is scrapped; in addition, for products with high requirements on the sealing performance of welding seams, X-ray flaw detection needs to be carried out on the welding seams after the welding seams are welded, and if defects such as air outlets and the like are detected, the defects are timely remedied on site to ensure that the sealing performance of the products meets the design requirements; how to complete the frame welding work of the thin-wall steel plate with large length-width ratio and ensure that the X-ray flaw detection of the welded seam is smoothly carried out is a difficult problem to be solved urgently on site.
Disclosure of Invention
The invention provides a step-by-step combined welding structure of a rectangular frame with a large length-width ratio and a welding method thereof, and solves the technical problems that the rectangular steel plate frame with the large length-width ratio is easy to deform and the welding seam is difficult to detect.
The invention solves the technical problems by the following technical scheme:
the utility model provides a great rectangular frame substep combination welded structure of length-width ratio, including rectangular shape preceding curb plate, rectangular shape posterior lateral plate, rectangle left side board, rectangle right side board and four the same linking square stand of structure, the structure of rectangular shape preceding curb plate is the same with the structure of rectangular shape posterior lateral plate, the structure of rectangle left side board is the same with the structure of rectangle right side board, the right side at the trailing flank of rectangle left side board is provided with rectangle left side board trailing flank right angle tang step, be formed with rectangle left side board trailing flank outside welding plane and rectangle left side board trailing flank inboard welding plane respectively on rectangle left side board trailing flank right angle tang step, be provided with stand right back right angle tang step respectively on the cross section that links up square stand, stand left front right angle tang step, stand obtuse angle breach step, be formed with the right side welding plane of stand trailing flank and the right side end overlap joint medial surface of stand trailing flank on stand right back right angle tang step respectively The left front right-angle seam allowance step of the upright column is respectively provided with an outer side welding plane of the front side surface of the connected square upright column and an inner side welding plane of the front side surface of the connected square upright column, and an obtuse-angle notch step of the upright column is provided with an inner side plane of the front side of the upright column, an inner side inclined plane of the upright column and an inner side plane of the back side of the upright column; the square stand column is connected with the short side plate rear side face right-angle spigot step on the rectangular left side plate through the stand column left front right-angle spigot step, and the left side end of the long-strip-shaped rear side plate is arranged on the stand column rear right-angle spigot step.
A vacuum electron beam outer welding seam is arranged between the welding plane of the outer side of the front side face of the square upright post and the welding plane of the outer side of the rear side face of the rectangular left side plate, a vacuum electron beam inner welding seam is arranged between the welding plane of the inner side of the front side face of the square upright post and the welding plane of the inner side of the rear side face of the rectangular left side plate, and a fillet welding seam is arranged between the horizontal plane of the inner side of the rear of the upright.
A welding method of a step-by-step combined welding structure of a rectangular frame with a large length-width ratio comprises the following steps:
firstly, processing a right-angled spigot step on the rear side surface of the rectangular left side plate to form a rear side surface outer side welding plane of the rectangular left side plate and a rear side surface inner side welding plane of the rectangular left side plate;
secondly, firstly processing a linking square upright post with a rectangular cross section, respectively processing an upright post right rear right-angle spigot step, an upright post left front right-angle spigot step and an upright post obtuse-angle gap step on the rectangular cross section of the linking square upright post, forming a right side welding plane of an upright post rear side surface and a right side end inner side surface lapping surface of an upright post rear side surface on the upright post right rear right-angle spigot step, respectively forming a linking square upright post front side surface outer side welding plane and a linking square upright post front side surface inner side welding plane on the upright post left front right-angle spigot step, and forming an upright post front inner side plane, an upright post inner side inclined plane and an upright post rear inner side plane on the upright post obtuse-angle gap step;
thirdly, in an electron beam vacuum welding chamber, a rectangular left side plate is butted with a left front right-angle seam allowance step of an upright column connected with a square upright column through a right-angle seam allowance step on the rear side surface of the rectangular left side plate, and the right-angle seam allowance step on the front side surface of the rectangular left side plate is butted with a left front right-angle seam allowance step of the upright column connected with the square upright column; welding an outer vacuum electron beam welding seam between a welding plane of the outer side of the front side face of the square upright column and a welding plane of the outer side of the rear side face of the rectangular left side plate by using a vacuum electron beam welding gun, and welding an inner vacuum electron beam welding seam between a welding plane of the inner side of the front side face of the square upright column and a welding plane of the inner side of the rear side face of the rectangular left side plate; welding the other connected square upright column butted on the front side surface of the rectangular left side plate with the rectangular left side plate by the same method;
fourthly, repeating the steps from the first step to the third step, and welding the rectangular right side plate and the other two connected square stand columns together;
fifthly, in an electron beam vacuum welding chamber, overlapping the left end of a long-strip-shaped rear side plate on a right rear right-angle seam allowance step of an upright post connected with a square upright post, overlapping the right end of the long-strip-shaped rear side plate on a left rear right-angle seam allowance step of the upright post connected with the square upright post on the rear side of a rectangular right side plate, overlapping the left end of a long-strip-shaped front side plate on a right front right-angle seam allowance step of the upright post on the front side of the rectangular left side plate by using the same method, and overlapping the right end of a long-strip-shaped front side plate on a left front right-angle seam allowance step of;
sixthly, welding a left side surface of the long strip-shaped rear side plate and a right side welding plane of the rear side surface of the upright column by using a vacuum electron beam welding gun to form a vacuum electron beam welding seam between the left side end of the long strip-shaped rear side plate and a connected square upright column, and sequentially completing the welding work between the right side surface of the long strip-shaped rear side plate and the rectangular right side plate, the connected square upright column on the front side surface of the long strip-shaped front side plate and the rectangular left side plate and the welding work between the connected square upright columns on the front side surfaces of the long strip-shaped front side plate and the rectangular right side;
and seventhly, forming fillet welds between the horizontal plane of the inner side of the rear part of the upright post connected with the rectangular upright post and the strip-shaped rear side plate through manual argon arc welding, and performing manual argon arc welding on the other three fillet welds on the inner side of the rectangular frame body by using the same method.
According to the invention, the butt welding part of the thin-wall steel plate with a large length-width ratio is provided with the connecting square upright post with the special-shaped cross section, the vacuum electron beam welding is used for replacing the traditional manual argon arc welding, and the fillet weld is only reserved at the inner side corner, so that the welding combination mode is greatly reduced compared with the groove welding heat input quantity, and the conduction of the welding stress of the thin-wall frame body is overcome to the greatest extent; the arrangement of the special-shaped connecting column greatly facilitates the detection of weld seam flaw detection.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the rectangular left side plate 3 of the present invention and two joining square columns 8 which are welded together;
FIG. 3 is a schematic structural view of a rectangular left side plate 3 of the present invention;
FIG. 4 is a schematic structural view of the square pillar 8 of the present invention;
fig. 5 is a schematic perspective view of a welded frame body according to the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a stepped combined welding structure of a rectangular frame with a large length-width ratio comprises a strip-shaped front side plate 1, a strip-shaped rear side plate 2, a rectangular left side plate 3, a rectangular right side plate 4 and four linking square upright posts 8 with completely same structures, wherein the structure of the strip-shaped front side plate 1 is completely the same as that of the strip-shaped rear side plate 2, the structure of the rectangular left side plate 3 is completely the same as that of the rectangular right side plate 4, a rectangular left side plate rear side right-angle spigot step 5 is arranged on the right side of the rear side of the rectangular left side plate 3, a rectangular left side plate rear side outer side welding plane 6 and a rectangular left side plate rear side inner side welding plane 7 are respectively formed on the rectangular left side plate rear side right-angle spigot step 5, a upright post right rear right-angle spigot step 9, an upright post left front right-angle spigot step 10 and an upright post obtuse angle notch step 11 are respectively arranged on, a right side welding plane 12 of the rear side surface of the upright post and a right side end inner side surface lapping plane 13 of the rear side surface of the upright post are respectively formed on the upright post right rear right-angle seam allowance step 9, a connecting square upright post front side surface outer side welding plane 14 and a connecting square upright post front side surface inner side welding plane 15 are respectively formed on the upright post left front right-angle seam allowance step 10, and an upright post front inner side plane 16, an upright post inner side inclined plane 17 and an upright post rear inner side plane 18 are formed on the upright post obtuse-angle seam allowance step 11; the square column 8 is connected with the short side plate rear side face right-angle spigot step 5 on the rectangular left side plate 3 through the column left front right-angle spigot step 10, and the left side end of the long-strip-shaped rear side plate 2 is arranged on the column right rear right-angle spigot step 9.
A vacuum electron beam outer welding seam 19 is arranged between the joint square upright post front side outer side welding plane 14 and the rectangular left side plate rear side outer side welding plane 6, and a vacuum electron beam inner welding seam 20 is arranged between the joint square upright post front side inner side welding plane 15 and the rectangular left side plate rear side inner side welding plane 7; firstly, welding and combining a rectangular left side plate 3 of a frame and two connected square stand columns 8 into an edge side integrated plate, then combining the rectangular left side plate with a strip-shaped front side plate 1 and a strip-shaped rear side plate 2, after the combination is completed, carrying out vacuum electron beam welding on the strip-shaped front side plate, the strip-shaped rear side plate and the edge side integrated plate, and finally, arranging a fillet weld 21 between an inner horizontal plane 18 behind the stand columns and the strip-shaped rear side plate 2.
A welding method of a step-by-step combined welding structure of a rectangular frame with a large length-width ratio comprises the following steps:
firstly, processing a right-angled spigot step 5 on the rear side of a rectangular left side plate 3 to form a rear side outer side welding plane 6 and a rear side inner side welding plane 7 of the rectangular left side plate;
secondly, firstly processing a linking square upright post with a rectangular cross section, respectively processing a right rear right-angle spigot step 9, a left front right-angle spigot step 10 and an obtuse-angle notch step 11 on the rectangular cross section of the linking square upright post, forming a right side welding plane 12 of the rear side surface of the upright post and an inner side surface lapping plane 13 of the right side end of the rear side surface of the upright post on the right rear right-angle spigot step 9 of the upright post, respectively forming a front side outer side welding plane 14 and a front side inner side welding plane 15 of the linking square upright post on the left front right-angle spigot step 10 of the upright post, and forming a front inner side plane 16, an inner side inclined plane 17 and a rear inner side plane 18 on the obtuse-angle notch step 11 of the upright post;
thirdly, in an electron beam vacuum welding chamber, the rectangular left side plate 3 is butted with the upright post left front right angle seam allowance step 10 connected with the square upright post 8 through the rectangular left side plate rear side right angle seam allowance step 5 on the rear side surface of the rectangular left side plate, and the rectangular left side plate front side right angle seam allowance step on the front side surface of the rectangular left side plate 3 is butted with the upright post left front right angle seam allowance step connected with the square upright post 8; welding an outer vacuum electron beam welding seam 19 between the outer side welding plane 14 of the front side surface of the square upright column and the outer side welding plane 6 of the rear side surface of the rectangular left side plate by using a vacuum electron beam welding gun, and welding an inner vacuum electron beam welding seam 20 between the inner side welding plane 15 of the front side surface of the square upright column and the inner side welding plane 7 of the rear side surface of the rectangular left side plate; welding the other connected square upright post 8 butted on the front side surface of the rectangular left side plate 3 with the rectangular left side plate 3 by the same method;
fourthly, repeating the steps from the first step to the third step, and welding the rectangular right side plate 4 and the other two connected square upright posts 8 together;
fifthly, in an electron beam vacuum welding chamber, overlapping the left end of the long-strip-shaped rear side plate 2 on a right rear right-angle seam allowance step 9 of the stand column connected with the square stand column 8, overlapping the right end of the long-strip-shaped rear side plate 2 on a left rear right-angle seam allowance step of the stand column connected with the square stand column on the rear side of the rectangular right side plate 4, overlapping the left end of the long-strip-shaped front side plate 1 on a right front right-angle seam allowance step of the stand column on the front side of the rectangular left side plate 3 by using the same method, and overlapping the right end of the long-strip-shaped front side plate 1 on the left front right-angle seam allowance step of the;
sixthly, welding the left side surface of the strip-shaped rear side plate 2 and the right side welding plane 12 of the rear side surface of the upright column by using a vacuum electron beam welding gun to form a vacuum electron beam welding seam 22 between the left side end of the strip-shaped rear side plate 2 and the connecting square upright column 8, and sequentially completing the welding work between the right side surface of the strip-shaped rear side plate 2 and the rectangular right side plate 4, the connecting square upright column on the front side surface of the strip-shaped front side plate 1 and the rectangular left side plate 3 and the welding work between the strip-shaped front side plate 1 and the connecting square upright column on the front side surface of the rectangular right side plate 4 by using the;
seventhly, fillet welds 21 are formed between the horizontal plane 18 at the inner side of the rear side of the square upright post 8 and the long strip-shaped rear side plate 2 through manual argon arc welding, and the other three fillet welds at the inner side of the rectangular frame body are welded through manual argon arc welding by the same method.
Claims (3)
1. The utility model provides a great rectangular frame step-by-step combination welded structure of length-width ratio, including rectangular shape preceding curb plate (1), rectangular shape posterior lateral plate (2), rectangle left side board (3), rectangle right side board (4) and four structure identical linking square stand (8), the structure of rectangular shape preceding curb plate (1) is identical with the structure of rectangular shape posterior lateral plate (2), the structure of rectangle left side board (3) is identical with the structure of rectangle right side board (4), a serial communication port, the right side of the trailing flank of rectangle left side board (3) is provided with rectangle left side board trailing flank right angle tang step (5), be formed with rectangle left side board trailing flank outside welding plane (6) and rectangle left side board trailing flank inside welding plane (7) respectively on rectangle left side board trailing flank right angle tang step (5), be provided with stand right back right angle tang step (9) respectively on the cross section of square stand (8) and link up, The upright post comprises an upright post left front right-angle seam allowance step (10) and an upright post obtuse-angle gap step (11), wherein a right side welding plane (12) of an upright post rear side surface and a right side end inner side surface lapping surface (13) of the upright post rear side surface are respectively formed on the upright post right rear right-angle seam allowance step (9), a connecting square upright post front side surface outer side welding plane (14) and a connecting square upright post front side surface inner side welding plane (15) are respectively formed on the upright post left front right-angle seam allowance step (10), and an upright post front inner side plane (16), an upright post inner side inclined plane (17) and an upright post rear inner side plane (18) are formed on the upright post obtuse-angle gap step; the square column (8) is connected with the short side plate rear side face right-angle spigot step (5) on the rectangular left side plate (3) through the column left front right-angle spigot step (10), and the left side end of the long strip-shaped rear side plate (2) is arranged on the column right rear right-angle spigot step (9).
2. The stepped combination welding structure of a rectangular frame with a large length-width ratio as claimed in claim 1, wherein a vacuum electron beam outer weld (19) is provided between the outer side welding plane (14) joining the front side of the square pillar and the outer side welding plane (6) joining the rear side of the left side of the rectangular pillar, a vacuum electron beam inner weld (20) is provided between the inner side welding plane (15) joining the front side of the square pillar and the inner side welding plane (7) joining the rear side of the left side of the rectangular pillar, and a fillet weld (21) is provided between the horizontal plane (18) of the rear inner side of the pillar and the elongated rear side plate (2).
3. The welding method of the step-by-step welded structure of the rectangular frame with the large length-width ratio as claimed in claim 1, comprising the steps of:
firstly, processing a right-angle seam allowance step (5) on the rear side surface of a rectangular left side plate (3) to form a rear side surface outer side welding plane (6) of the rectangular left side plate and a rear side surface inner side welding plane (7) of the rectangular left side plate;
secondly, firstly processing a linking square upright post with a rectangular cross section, respectively processing a right rear right-angle spigot step (9), a left front right-angle spigot step (10) and an obtuse angle notch step (11) on the rectangular cross section of the linking square upright post, forming a right side welding plane (12) of the rear side of the upright post and a right side end inner side surface lapping surface (13) of the rear side of the upright post on the right rear right-angle spigot step (9), respectively forming a linking square upright post front side outer side welding plane (14) and a linking square upright post front side inner side welding plane (15) on the left front right-angle spigot step (10), and forming an upright post front inner side plane (16), an upright post inner side inclined plane (17) and an upright post rear inner side plane (18) on the obtuse angle notch step (11);
thirdly, in an electron beam vacuum welding chamber, a rectangular left side plate (3) is butted with a stand column left front right angle seam allowance step (10) connected with a square stand column (8) through a rectangular left side plate rear side right angle seam allowance step (5) on the rear side surface of the rectangular left side plate, and a rectangular left side plate front side right angle seam allowance step on the front side surface of the rectangular left side plate (3) is butted with a stand column left front right angle seam allowance step on the other connected square stand column (8); welding an outer vacuum electron beam welding seam (19) between a welding plane (14) for connecting the outer side of the front side face of the square upright post and a welding plane (6) for welding the outer side of the rear side face of the rectangular left side plate by using a vacuum electron beam welding gun, and welding an inner vacuum electron beam welding seam (20) between a welding plane (15) for connecting the inner side of the front side face of the square upright post and a welding plane (7) for welding the inner side of the rear side face of the rectangular left side plate; in the same way, another connected square upright post (8) butted on the front side surface of the rectangular left side plate (3) is welded with the rectangular left side plate (3);
fourthly, repeating the steps from the first step to the third step, and welding the rectangular right side plate (4) and the other two connected square upright posts (8) together;
fifthly, in an electron beam vacuum welding chamber, overlapping the left end of a long-strip-shaped rear side plate (2) on a stand column right rear right-angle seam allowance step (9) connected with a square stand column (8), overlapping the right end of the long-strip-shaped rear side plate (2) on a stand column left rear right-angle seam allowance step connected with the square stand column on the rear side of a rectangular right side plate (4), overlapping the left end of a long-strip-shaped front side plate (1) on a stand column right front right-angle seam allowance step on the front side of the rectangular left side plate (3) by using the same method, and overlapping the right end of the long-strip-shaped front side plate (1) on a stand column left front right-angle seam allowance step on the front side of the rectangular right side plate;
sixthly, welding the left side surface of the long strip-shaped rear side plate (2) and a right side welding plane (12) of the rear side surface of the upright column by using a vacuum electron beam welding gun to form a vacuum electron beam welding seam (22) between the left side end of the long strip-shaped rear side plate and a connecting square upright column (8), and sequentially completing the welding work between the right side surface of the long strip-shaped rear side plate (2) and a rectangular right side plate (4), the connecting square upright column on the front side surfaces of the long strip-shaped front side plate (1) and the rectangular left side plate (3) and the welding work between the strip-shaped front side plate (1) and the connecting square upright column on the front side surface of the rectangular right side plate (4) by;
and seventhly, forming fillet welds (21) between the horizontal plane (18) at the inner side of the rear side of the square upright post (8) and the strip-shaped rear side plate (2) through manual argon arc welding, and performing manual argon arc welding on the other three fillet welds at the inner side of the rectangular frame body by using the same method.
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| CN112091461A (en) * | 2020-08-12 | 2020-12-18 | 星崎电机（苏州）有限公司 | Appearance improvement welding method for welding structure of resin plate and metal frame |
| CN112570876A (en) * | 2020-10-27 | 2021-03-30 | 沈阳富创精密设备股份有限公司 | GH4141 nickel-based superalloy vacuum electron beam welding method |
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| CN112091461A (en) * | 2020-08-12 | 2020-12-18 | 星崎电机（苏州）有限公司 | Appearance improvement welding method for welding structure of resin plate and metal frame |
| CN112091461B (en) * | 2020-08-12 | 2022-05-17 | 星崎电机（苏州）有限公司 | Appearance improvement welding method for welding structure of resin plate and metal frame |
| CN112570876A (en) * | 2020-10-27 | 2021-03-30 | 沈阳富创精密设备股份有限公司 | GH4141 nickel-based superalloy vacuum electron beam welding method |
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