CN110977170A - Electron beam welding method for thin-wall casing gas-collecting hood structure - Google Patents
Electron beam welding method for thin-wall casing gas-collecting hood structure Download PDFInfo
- Publication number
- CN110977170A CN110977170A CN201911161987.4A CN201911161987A CN110977170A CN 110977170 A CN110977170 A CN 110977170A CN 201911161987 A CN201911161987 A CN 201911161987A CN 110977170 A CN110977170 A CN 110977170A
- Authority
- CN
- China
- Prior art keywords
- welding
- collecting hood
- gas
- clamping ring
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/0093—Working by laser beam, e.g. welding, cutting or boring combined with mechanical machining or metal-working covered by other subclasses than B23K
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
An electron beam welding method for a thin-wall casing gas-collecting hood structure belongs to the technical field of gas-collecting hood welding, and comprises the following steps: step 1, designing a welding structure; step 2, processing the gas collecting hood 1 in a single piece; step 3, welding the gas collecting hood 1; step 2.6 gas collecting channel heat setting frock includes matrix 5, clamping ring 6, pin 7, voussoir 8, hangs 9, the internal surface welding of matrix 5 hangs 9, clamping ring 6 is installed at matrix 5 top, and 6 tops of clamping ring evenly are provided with voussoir 8 along circumference, and voussoir 8 and the through-hole one-to-one of clamping ring 6, pin 7 passes voussoir 8, clamping ring 6 in proper order and fixes clamping ring 6 and matrix 5. According to the invention, through the design of the welding structure, the design and process improvement of the gas-collecting hood heat-setting tool and the welding process improvement, the welding residual stress is reduced, the welding deformation is reduced, and the part quality is improved.
Description
Technical Field
The invention belongs to the technical field of welding of gas collecting hoods, and particularly relates to an electron beam welding method for a gas collecting hood structure of a thin-wall casing.
Background
The thin-wall case is formed by welding an inner ring, an outer ring, a support plate, a gas-collecting hood, a mounting seat and other parts, the number of welding seams is large, deformation is large, particularly the gas-collecting hood part, the gas-collecting hood and the outer ring are welded through two circumferential welding seams, the lengths of the two circumferential welding seams are 2.934m and 3.045m respectively, argon arc welding is generally adopted for welding in the prior art, and for the large-scale thin-wall case structural part made of titanium alloy, argon arc welding is adopted for welding, the welding seams are long in length, deformation is very large, size overproof is serious, residual stress is large, welding protection effect is poor, and the quality of the.
Disclosure of Invention
The invention realizes the electron beam welding of the thin-wall casing gas-collecting hood by the welding structure design of the gas-collecting hood and the outer ring, the single-piece process improvement of the gas-collecting hood and the welding process method improvement, fully exerts the characteristics of high electron beam welding power density, low heat input of a weldment and small deformation of the weldment, and can effectively avoid the quality problem caused by the oxidation of a welding seam because the welding is carried out under the vacuum condition and the purity is high.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electron beam welding method for a thin-wall casing gas-collecting hood structure comprises the following steps:
2.1, adopting plane laser equipment to blank the plate according to a sketch, checking the size of a first part according to the sketch, and cutting the rest parts by laser if the first part is qualified; if the first piece is not qualified, the laser cutting program is corrected until the first piece is qualified;
step 2.2, removing the remelted layer, removing burrs on the periphery of the strip material, wherein the allowance is not less than 0.1 mm;
step 2.3, bending on a three-axis rolling machine according to the size of a sketch;
step 2.4, placing the cut parts into pickling bath solution for pickling to remove oxide skins and attachments, drying the pickled parts by using compressed air, completing welding within 120 hours, placing the parts which are not welded in an overdue period into a pickling bath again for pickling or cleaning by using a mechanical method, wherein the mechanical method is to brush the surfaces of the parts by using a brush or scrape the surfaces of the parts by using a scraper;
step 2.5, wiping the to-be-welded part and the welding wire with alcohol before welding, and performing automatic argon arc welding according to a sketch; argon gas protection is adopted on the front and back surfaces during welding, and no welding flux is allowed to be added;
step 2.6, the part is arranged on a gas-collecting hood heat-setting tool clamp, the part and the exposed surface of the clamp are cleaned by acetone, and the part and the exposed surface of the clamp are placed in a vacuum furnace after being dried or dried by blowing, and the part is strictly prohibited from touching by bare hands; the pressure in the vacuum chamber of the vacuum furnace before and during heating is not more than 0.067 Pa; heating the vacuum furnace to 750 +/-10 ℃, carrying out heat preservation treatment, cooling to 500 ℃ along with the furnace, then filling argon of 0.2-0.4Mpa, cooling to below 80 ℃, and discharging;
step 2.7, after the gas collecting hood is subjected to heat setting, the end face of the vehicle is driven, and the clamping fixture and the pressing ring are arranged on
Positioning, namely turning to the diameter of the small end and turning to the axial height at the large end;
step 2.8, boring holes according to the positions shown in the figure, and ensuring the size;
step 2.9, cutting the part according to the scribing position line indicated by the sketch angle size, aligning the molybdenum wire and the scribing line and visually checking the molybdenum wire and the scribing line before processing, and cutting 4 sectors per whole ring;
step 2.10, removing the surface of the part, namely forming a line cutting remelting layer; the surface of the part is free from collision, scratching and crushing, the polished welding line ensures that the inner surface and the outer surface are flush, and all cuts and welding line type holes cannot be superposed; finishing the processing of the gas-collecting hood;
step 3.1, using white cotton cloth to dip acetone to carefully wipe the welding joint of the gas-collecting hood, the outer ring and the parameter verification test piece, so that the surface of the test piece is free of oil stains, dust, dirt, grease or other foreign matters; cleaning the clamp to ensure that the surface of the clamp is free from pollutants such as oil stain, paint, rusty spot and fusible metal;
step 3.2, performing positioning welding on the gas collecting hood and the outer ring through argon arc welding, and ensuring that the assembly gap is not more than 0.1mm and the dislocation is not more than 0.1 mm;
step 3.3, fixing the parameter verification test piece on the bracket, adjusting the height of the bracket to ensure that the height of the parameter verification test piece is consistent with the height of the welding line between the gas collecting cover and the outer ring, vacuumizing until the pressure is lower than 4.0 multiplied by 10-4mbar, adjusting the position of the parameter verification test piece to enable the focus to be aligned with the welding line, carrying out centering scanning on the welding line, adjusting the welding procedure after confirming that no error exists, and carrying out a welding parameter verification test according to the technological parameters of the gas-collecting hood electron beam welding; if the parameter is not qualified, the process parameters of the electron beam welding of the gas collecting hood are verified again by eliminating the human interference factor and the equipment interference factor until the parameters are qualified;
step 3.4, mounting the welding tool on a KIP620C turntable, and adjusting and fixing; mounting the gas-collecting hood and the outer ring assembly on a tool, adjusting, pressing and fixing to ensure that the gap between the two contact surfaces is not more than 0.1mm, adjusting the B axis to 90 degrees, and sending the B axis into a vacuum chamber;
step 3.5, vacuumizing again until the pressure is lower than 4.0X 10-4mbar, adjusting the positions of the gas-collecting hood and the outer ring assembly to enable the focal points to be aligned with the welding lines, welding according to the qualified parameters verified in the table, keeping vacuum for at least 5min after welding, and then inflating the vacuum chamber;
step 3.6, taking out the parts of the air inlet casing, and checking the surface quality of the welding seam according to the standard, wherein a: the surface of the welding seam should be smooth and transited to the base metal without the defects of cracks, unfused, burnt, burn-through and cut welding seams; b: the surface color of the welding line is silvery white or faint yellow, the surface of the test piece is allowed to exist in a fumigating and plating color, the diameter of a surface pore is not more than 0.30mm, the depth of the pore is not more than 0.4mm, the distance between pores is not less than 3 times of the maximum pore diameter, on a welding line with the length of 100mm, the accumulated length is not more than 1.6mm, the undercut with the radius not more than 1.5mm and the depth not more than 0.12mm is allowed to exist, the depth of a pit is not more than 0.12mm, on the welding line with the length of 100mm, the accumulated length of a single pit is not more than 15.0mm, the surface is in smooth transition, the collapse depth is; the width of the front side of the welding line is not less than 2.0mm, the height of the front side of the welding line is not more than 0.30mm, and the dislocation after welding is less than 0.12 mm; after the welded parts are inspected visually and coloristically, the standard exceeding defect is not found, and the requirement of a design drawing is met.
Step 2.6 the gas collecting channel heat setting frock includes moulding child, clamping ring, pin, voussoir, hangs, the internal surface welding of moulding child has the hanging, the clamping ring is installed at moulding child top, and the clamping ring top evenly is provided with the voussoir along circumference, and the voussoir and the through-hole one-to-one of clamping ring, the pin passes voussoir, clamping ring in proper order and fixes clamping ring and moulding child.
The invention has the beneficial effects that:
according to the invention, through the design of the welding structure, the design and process improvement of the gas-collecting hood heat-setting tool and the welding process improvement, the welding residual stress is reduced, the welding deformation is reduced, and the part quality is improved.
The welding structure and the welding method are applied to welding of the gas collecting hood part of the thin-wall case, welding deformation of the welded part is effectively reduced, manufacturing conformance of the thin-wall case is improved, the welding structure and the welding method can be popularized to production of parts with similar structures, and the welding structure and the welding method have very wide application and popularization values.
The electron beam welding of the thin-wall casing gas-collecting hood by adopting the invention effectively reduces the welding deformation, reduces the component replacement rate of the overhaul engine, can save the manufacturing cost by 850 ten thousand yuan per year, can reduce the development period and the cost investment for other models under development, and can save the development cost by more than ten million within the estimated whole development period to the design and the design.
Drawings
FIG. 1 is a schematic view of a thin-walled casing structure;
FIG. 2 is a schematic view of a structure of a thin-walled casing gas-collecting hood cooperating with an outer ring;
FIG. 3 is an enlarged view of the thin-walled casing gas-collecting channel and outer ring mating structure T1 of FIG. 2;
FIG. 4 is an enlarged view of the thin-walled casing gas-collecting channel and outer ring mating structure T2 of FIG. 2;
FIG. 5 is a diagram of the margin before the thin-walled casing assembly is processed;
FIG. 6 is a schematic view of a gas collecting hood heat setting tool;
FIG. 7 is a laser blanking drawing;
FIG. 8 is a schematic illustration of a strip;
FIG. 9 is a schematic view after the strip is roll-bent;
FIG. 10 is a schematic view of automatic argon arc welding;
FIG. 11 is a schematic bore;
FIG. 12 is a surface quality chart of parts after welding;
1-gas collecting hood, 2-outer ring, 3-support, 4-inner ring, 5-mould, 6-press ring, 7-pin, 8-wedge block and 9-hanging.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
An electron beam welding method for a thin-wall casing gas-collecting hood structure comprises the following steps:
step 2.1, adopting HYPECUT-3015 plane laser equipment to blank the plate according to a sketch, checking the size of a first piece according to the sketch as shown in fig. 7, and cutting the rest parts by laser if the first piece is checked to be qualified; if the first piece is not qualified, the laser cutting program is corrected until the first piece is qualified;
step 2.2, removing the remelted layer with the residual of 0.15mm, and removing burrs on the periphery of the strip material, as shown in fig. 8;
step 2.3, rolling and bending on a three-axis rolling machine according to the size of a sketch, as shown in figure 9;
step 2.4, placing the cut parts into pickling bath solution for pickling to remove oxide skins and attachments, drying the pickled parts by using compressed air, completing welding within 120 hours, placing the parts which are not welded in an overdue period into a pickling bath again for pickling or cleaning by using a mechanical method, wherein the mechanical method is to brush the surfaces of the parts by using a brush or scrape the surfaces of the parts by using a scraper;
step 2.5, wiping the to-be-welded part and the welding wire with alcohol before welding, and performing automatic argon arc welding according to a sketch; argon gas protection is adopted on the front side and the back side during welding, and no solder is allowed to be added, as shown in figure 10;
step 2.6, the gas collecting hood is installed on a gas collecting hood heat setting tool fixture, specifically, the gas collecting hood is firstly placed on a mould of the gas collecting hood heat setting tool, then is compressed by a compression ring, and finally is fixed by a pin and a wedge block; cleaning the exposed surfaces of the parts and the clamp by using acetone, airing or drying the parts and the clamp, putting the parts and the clamp into a vacuum furnace, and strictly preventing touching by hands; the pressure in the vacuum chamber of the vacuum furnace before and during heating is 0.067 Pa; heating the vacuum furnace to 760 ℃, preserving heat for 2 hours, cooling to 500 ℃ along with the furnace, then filling argon of 0.3Mpa, cooling to 80 ℃, and discharging; the original gas-collecting hood 1 is directly formed by roll bending, and the roundness of the gas-collecting hood 1 meets the requirement of electron beam welding by adding a heat setting tool; after heat setting, the setting effect at the welding seam is still obvious, and the integral roundness is better;
step 2.7, after the gas collecting hood 1 is subjected to heat setting, the end face of the vehicle is driven, and the clamping fixture and the pressing ring 6 are arranged in the position
Positioning, namely turning to the diameter of the small end, and turning to the axial height from the large end to the small end to ensure that the axial height of the gas collecting hood 1 is increased by 1mm along the large end and the small end respectively; the diameter of the large end is indirectly ensured, the later stage is considered to be matched with an electron beam welding process, and the large end is matched with the existing turning tool;
step 2.8, boring according to the position shown in the figure 11 to ensure the size;
step 2.9, cutting the part according to the scribing position line indicated by the sketch angle size, aligning the molybdenum wire and the scribing line and visually checking the molybdenum wire and the scribing line before processing, and cutting 4 sectors per whole ring;
step 2.10, removing the surface of the part, namely forming a line cutting remelting layer; the surface of the part is free from collision, scratching and crushing, the polished welding line ensures that the inner surface and the outer surface are flush, and all cuts and welding line type holes cannot be superposed; finishing the processing of the gas-collecting hood 1;
and 3, welding the gas collecting hood 1:
step 3.1, dipping the white cotton cloth into acetone to carefully wipe the welding joints of the gas-collecting hood 1, the outer ring 2 and the parameter verification test piece, so that the surfaces of the welding joints are free of oil stains, dust, dirt, grease or other foreign matters; cleaning the clamp to ensure that the surface of the clamp is free from pollutants such as oil stain, paint, rusty spot and fusible metal;
step 3.2, performing positioning welding on the gas collecting hood 1 and the outer ring 2 through argon arc welding, and ensuring that the assembly gap is 0.1mm and the dislocation is 0.1 mm;
step 3.3, fixing the parameter verification test piece on the bracket 3, adjusting the height of the bracket 3, and ensuring the height of the parameter verification test piece and the height I of the welding seam between the gas collecting cover 1 and the outer ring 2Then vacuuming until the pressure is 4.0 x 10-4mbar, adjusting the position of the parameter verification test piece to enable the focus to be aligned with the welding line, carrying out centering scanning on the welding line, adjusting the welding procedure after confirming that no error exists, and carrying out a welding parameter verification test according to the parameters in the table 1; if the parameter verification is unqualified, the parameter in the table 1 is verified again by eliminating the human interference factor and the equipment interference factor until the parameter is qualified;
TABLE 1 gas-collecting channel Electron Beam welding Process parameters
Step 3.4, mounting the welding tool on a KIP620C turntable, and adjusting and fixing; mounting the assembly of the gas-collecting hood 1 and the outer ring 2 on a tool, adjusting, pressing and fixing to ensure that the gap between the contact surfaces of the gas-collecting hood 1 and the outer ring 2 is 0.1mm, adjusting the B axis to 90 degrees, and sending the B axis into a vacuum chamber;
step 3.5, vacuumizing again until the pressure is 4.0 multiplied by 10-4mbar, adjusting the position of the assembly of the gas-collecting hood 1 and the outer ring 2 to enable the focus to be aligned with the welding line, welding according to the qualified parameters verified in the table, keeping the vacuum time for 5min after the welding is finished, and then inflating the vacuum chamber;
step 3.6, taking out the parts of the air inlet casing, and checking the surface quality of the welding seam according to the standard, wherein a: the surface of the welding seam should be smooth and transited to the base metal without the defects of cracks, unfused, burnt, burn-through and cut welding seams; b: the surface color of the welding line is silvery white or faint yellow, the surface of the test piece is allowed to exist in a fumigating and plating color, the diameter of a surface pore is not more than 0.30mm, the depth of the pore is not more than 0.4mm, the distance between pores is not less than 3 times of the maximum pore diameter, on a welding line with the length of 100mm, the accumulated length is not more than 1.6mm, the undercut with the radius not more than 1.5mm and the depth not more than 0.12mm is allowed to exist, the depth of a pit is not more than 0.12mm, on the welding line with the length of 100mm, the accumulated length of a single pit is not more than 15.0mm, the surface is in smooth transition, the collapse depth is; the width of the front side of the welding line is not less than 2.0mm, the height of the front side of the welding line is not more than 0.30mm, and the dislocation after welding is less than 0.12 mm; after the welded parts are subjected to visual and coloring inspection, the standard exceeding defect is not found, and the requirement of a design drawing is met; the surface of the welded seam is well formed by welding the part by using the determined welding parameters, the back splash is effectively controlled by using the medium-pressure welding process parameters, and the surface quality of the welded part is shown in figure 12.
Step 2.6 gas collecting channel heat setting frock includes matrix 5, clamping ring 6, pin 7, voussoir 8, hangs 9, the internal surface welding of matrix 5 hangs 9, clamping ring 6 is installed at matrix 5 top, and 6 tops of clamping ring evenly are provided with voussoir 8 along circumference, and voussoir 8 and the through-hole one-to-one of clamping ring 6, pin 7 passes voussoir 8, clamping ring 6 in proper order and fixes clamping ring 6 and matrix 5, as shown in fig. 6.
Claims (2)
1. An electron beam welding method for a thin-wall casing gas-collecting hood structure is characterized by comprising the following steps:
step 1, designing a welding structure: the requirement of the electron beam welding gap is not more than 0.1mm, the requirement of dislocation before welding is not more than 0.1mm, and the deformation generated by welding the outer ring and the support plate at the earlier stage is taken into consideration at the same time, the original joint form of the argon arc welding strip break is changed into a butt joint form, and a certain welding deformation is reserved at the same time; the original argon arc welding structure is provided with a 60-degree V-shaped groove, the assembly gap is 0.5mm, the groove is not formed, the allowance is increased in the original radial direction, and the combined machining is carried out after the support plate is welded with the outer ring and the inner ring;
step 2, processing a single gas collecting hood:
2.1, adopting plane laser equipment to blank the plate according to a sketch, checking the size of a first part according to the sketch, and cutting the rest parts by laser if the first part is qualified; if the first piece is not qualified, the laser cutting program is corrected until the first piece is qualified;
step 2.2, removing the remelted layer, removing burrs on the periphery of the strip material, wherein the allowance is not less than 0.1 mm;
step 2.3, bending on a three-axis rolling machine according to the size of a sketch;
step 2.4, placing the cut parts into pickling bath solution for pickling to remove oxide skins and attachments, drying the pickled parts by using compressed air, completing welding within 120 hours, placing the parts which are not welded in an overdue period into a pickling bath again for pickling or cleaning by using a mechanical method, wherein the mechanical method is to brush the surfaces of the parts by using a brush or scrape the surfaces of the parts by using a scraper;
step 2.5, wiping the to-be-welded part and the welding wire with alcohol before welding, and performing automatic argon arc welding according to a sketch; argon gas protection is adopted on the front and back surfaces during welding, and no welding flux is allowed to be added;
step 2.6, the part is arranged on a gas-collecting hood heat-setting tool clamp, the part and the exposed surface of the clamp are cleaned by acetone, and the part and the exposed surface of the clamp are placed in a vacuum furnace after being dried or dried by blowing, and the part is strictly prohibited from touching by bare hands; the pressure in the vacuum chamber of the vacuum furnace before and during heating is not more than 0.067 Pa; heating the vacuum furnace to 750 +/-10 ℃, carrying out heat preservation treatment, cooling to 500 ℃ along with the furnace, then filling argon of 0.2-0.4Mpa, cooling to below 80 ℃, and discharging;
step 2.7, after the gas collecting hood is subjected to heat setting, the end face of the vehicle is driven, and the clamping fixture and the pressing ring are arranged on
Positioning, namely turning to the diameter of the small end and turning to the axial height at the large end;
step 2.8, boring holes according to the positions shown in the figure, and ensuring the size;
step 2.9, cutting the part according to the scribing position line indicated by the sketch angle size, aligning the molybdenum wire and the scribing line and visually checking the molybdenum wire and the scribing line before processing, and cutting 4 sectors per whole ring;
step 2.10, removing the surface of the part, namely forming a line cutting remelting layer; the surface of the part is free from collision, scratching and crushing, the polished welding line ensures that the inner surface and the outer surface are flush, and all cuts and welding line type holes cannot be superposed; finishing the processing of the gas-collecting hood;
step 3, welding the gas collecting hood:
step 3.1, using white cotton cloth to dip acetone to carefully wipe the welding joint of the gas-collecting hood, the outer ring and the parameter verification test piece, so that the surface of the test piece is free of oil stains, dust, dirt, grease or other foreign matters; cleaning the clamp to ensure that the surface of the clamp is free from pollutants such as oil stain, paint, rusty spot and fusible metal;
step 3.2, performing positioning welding on the gas collecting hood and the outer ring through argon arc welding, and ensuring that the assembly gap is not more than 0.1mm and the dislocation is not more than 0.1 mm;
step 3.3, fixing the parameter verification test piece on the bracket, adjusting the height of the bracket to ensure that the height of the parameter verification test piece is consistent with the height of the welding line between the gas collecting cover and the outer ring, vacuumizing until the pressure is lower than 4.0 multiplied by 10-4mbar, adjusting the position of the parameter verification test piece to enable the focus to be aligned with the welding line, carrying out centering scanning on the welding line, adjusting the welding procedure after confirming that no error exists, and carrying out a welding parameter verification test according to the technological parameters of the gas-collecting hood electron beam welding; if the parameter is not qualified, the process parameters of the electron beam welding of the gas collecting hood are verified again by eliminating the human interference factor and the equipment interference factor until the parameters are qualified;
step 3.4, mounting the welding tool on a KIP620C turntable, and adjusting and fixing; mounting the gas-collecting hood and the outer ring assembly on a tool, adjusting, pressing and fixing to ensure that the gap between the two contact surfaces is not more than 0.1mm, adjusting the B axis to 90 degrees, and sending the B axis into a vacuum chamber;
step 3.5, vacuumizing again until the pressure is lower than 4.0X 10-4mbar, adjusting the positions of the gas-collecting hood and the outer ring assembly to enable the focal points to be aligned with the welding lines, welding according to the qualified parameters verified in the table, keeping vacuum for at least 5min after welding, and then inflating the vacuum chamber;
step 3.6, taking out the parts of the air inlet casing, and checking the surface quality of the welding seam according to the standard, wherein a: the surface of the welding seam should be smooth and transited to the base metal without the defects of cracks, unfused, burnt, burn-through and cut welding seams; b: the surface color of the welding line is silvery white or faint yellow, the surface of the test piece is allowed to exist in a fumigating and plating color, the diameter of a surface pore is not more than 0.30mm, the depth of the pore is not more than 0.4mm, the distance between pores is not less than 3 times of the maximum pore diameter, on a welding line with the length of 100mm, the accumulated length is not more than 1.6mm, the undercut with the radius not more than 1.5mm and the depth not more than 0.12mm is allowed to exist, the depth of a pit is not more than 0.12mm, on the welding line with the length of 100mm, the accumulated length of a single pit is not more than 15.0mm, the surface is in smooth transition, the collapse depth is; the width of the front side of the welding line is not less than 2.0mm, the height of the front side of the welding line is not more than 0.30mm, and the dislocation after welding is less than 0.12 mm; after the welded parts are inspected visually and coloristically, the standard exceeding defect is not found, and the requirement of a design drawing is met.
2. The electron beam welding method for the gas collecting hood structure of the thin-wall casing as claimed in claim 1, wherein: step 2.6 the gas collecting channel heat setting frock includes moulding child, clamping ring, pin, voussoir, hangs, the internal surface welding of moulding child has the hanging, the clamping ring is installed at moulding child top, and the clamping ring top evenly is provided with the voussoir along circumference, and the voussoir and the through-hole one-to-one of clamping ring, the pin passes voussoir, clamping ring in proper order and fixes clamping ring and moulding child.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161987.4A CN110977170B (en) | 2019-11-25 | 2019-11-25 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911161987.4A CN110977170B (en) | 2019-11-25 | 2019-11-25 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110977170A true CN110977170A (en) | 2020-04-10 |
| CN110977170B CN110977170B (en) | 2021-05-18 |
Family
ID=70086297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911161987.4A Active CN110977170B (en) | 2019-11-25 | 2019-11-25 | Electron beam welding method for thin-wall casing gas-collecting hood structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110977170B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453745A (en) * | 2020-11-30 | 2021-03-09 | 中国航发动力股份有限公司 | Welding seam allowance of casing with double-welding-seam structure and machining method |
| CN112916996A (en) * | 2021-01-28 | 2021-06-08 | 宁波江丰电子材料股份有限公司 | Electron beam welding method for circular target and annular back plate |
| CN113182690A (en) * | 2021-05-21 | 2021-07-30 | 南京工业职业技术大学 | High-energy beam composite welding method for stainless steel cooling plate |
| CN113878216A (en) * | 2021-10-18 | 2022-01-04 | 中国航发沈阳黎明航空发动机有限责任公司 | Process design for electron beam welding of inner ring and support plate |
| CN113909724A (en) * | 2021-10-20 | 2022-01-11 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for controlling straightness and position of titanium alloy thin-wall welding casing support plate |
| CN114043109A (en) * | 2021-12-15 | 2022-02-15 | 中国航发动力股份有限公司 | Composite connection method of large-size round-square 3D printer case |
| CN117020367A (en) * | 2023-10-08 | 2023-11-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Welding device and welding method for titanium alloy supporting ring of engine tail nozzle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350564A (en) * | 2011-09-05 | 2012-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Argon arc welding method for inlet casing gas-collecting hood having lock bottom welding joint |
| CN203636691U (en) * | 2013-12-03 | 2014-06-11 | 株洲南方燃气轮机成套制造安装有限公司 | Sealing fixture for pump of gas collecting chamber of compressor casing |
| CN104384816A (en) * | 2014-10-21 | 2015-03-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Welding method for box type part of air intake machine |
| CN104439730A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Fan casing assembly welding method and tool for fan casing assembly welding method |
| CN204344275U (en) * | 2014-12-01 | 2015-05-20 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of fabricated inlet casing gas gathering system |
| CN107999950A (en) * | 2017-12-06 | 2018-05-08 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing |
| CN108015420A (en) * | 2017-12-01 | 2018-05-11 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of method for laser welding of casing small space |
-
2019
- 2019-11-25 CN CN201911161987.4A patent/CN110977170B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350564A (en) * | 2011-09-05 | 2012-02-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Argon arc welding method for inlet casing gas-collecting hood having lock bottom welding joint |
| CN203636691U (en) * | 2013-12-03 | 2014-06-11 | 株洲南方燃气轮机成套制造安装有限公司 | Sealing fixture for pump of gas collecting chamber of compressor casing |
| CN104384816A (en) * | 2014-10-21 | 2015-03-04 | 沈阳黎明航空发动机(集团)有限责任公司 | Welding method for box type part of air intake machine |
| CN104439730A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Fan casing assembly welding method and tool for fan casing assembly welding method |
| CN204344275U (en) * | 2014-12-01 | 2015-05-20 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of fabricated inlet casing gas gathering system |
| CN108015420A (en) * | 2017-12-01 | 2018-05-11 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of method for laser welding of casing small space |
| CN107999950A (en) * | 2017-12-06 | 2018-05-08 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of middle pressure high-velocity electron beam welding method of titanium alloy thin wall casing |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453745A (en) * | 2020-11-30 | 2021-03-09 | 中国航发动力股份有限公司 | Welding seam allowance of casing with double-welding-seam structure and machining method |
| CN112916996A (en) * | 2021-01-28 | 2021-06-08 | 宁波江丰电子材料股份有限公司 | Electron beam welding method for circular target and annular back plate |
| CN113182690A (en) * | 2021-05-21 | 2021-07-30 | 南京工业职业技术大学 | High-energy beam composite welding method for stainless steel cooling plate |
| CN113182690B (en) * | 2021-05-21 | 2022-05-20 | 南京工业职业技术大学 | High-energy beam composite welding method for stainless steel cooling plate |
| CN113878216A (en) * | 2021-10-18 | 2022-01-04 | 中国航发沈阳黎明航空发动机有限责任公司 | Process design for electron beam welding of inner ring and support plate |
| CN113878216B (en) * | 2021-10-18 | 2022-11-01 | 中国航发沈阳黎明航空发动机有限责任公司 | Welding method for electron beam welding of inner ring and support plate |
| CN113909724A (en) * | 2021-10-20 | 2022-01-11 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for controlling straightness and position of titanium alloy thin-wall welding casing support plate |
| CN114043109A (en) * | 2021-12-15 | 2022-02-15 | 中国航发动力股份有限公司 | Composite connection method of large-size round-square 3D printer case |
| CN117020367A (en) * | 2023-10-08 | 2023-11-10 | 中国航发沈阳黎明航空发动机有限责任公司 | Welding device and welding method for titanium alloy supporting ring of engine tail nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110977170B (en) | 2021-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110977170B (en) | Electron beam welding method for thin-wall casing gas-collecting hood structure | |
| US8153922B2 (en) | Insert weld repair | |
| JP5322371B2 (en) | How to repair a disk with an integrated blade, test piece at the start and end of work | |
| US20070084906A1 (en) | Hole repair technique and apparatus | |
| CN101444871A (en) | Method for deeply repairing scrap with local defects by utilizing electron beam bonding | |
| CN110125619B (en) | Electron beam welding repair method for large-thickness titanium alloy I-shaped welding part | |
| US20090064479A1 (en) | Methods for Performing Gas Turbine Engine Casing Repairs and Repaired Cases | |
| CN109207991B (en) | Shaft sleeve repairing process | |
| CN113500279A (en) | Electric resistance welding process for end plugs of ODS-FeCrAl alloy cladding tube fuel rods | |
| CN108015420B (en) | Laser welding method for narrow space of cartridge receiver | |
| CN103586560B (en) | The repair method of crackle at a kind of combustion box mounting bracket | |
| CN104439632A (en) | Method for repairing abrasion defect of thin-wall lubricating oil tank shell | |
| JP3536807B2 (en) | Processing method of laser overlay parts | |
| CN112621103B (en) | Repair method for titanium alloy blade of aircraft engine compressor | |
| CN112338451B (en) | Vacuum brazing method for dissimilar material sleeved workpiece | |
| CN111702317A (en) | Electron beam welding method for double-sided planet weld joint structure | |
| CN101462203A (en) | Laser beam welding technique of berylliumcopper alloy mold | |
| CN104043901B (en) | A kind of stainless steel faucet case weld technique | |
| CN110977215A (en) | Cylinder body butt joint back chipping-free weld joint pretreatment process | |
| CN112743292A (en) | Argon arc brazing repair method for cast iron part | |
| CN112025096A (en) | Stainless steel water-cooling base ring and welding process method thereof | |
| CN111360400A (en) | Welding method for automobile aluminum cast radiator | |
| CN114273468B (en) | Thermal correction process for vacuum brazing parts | |
| CN113369617B (en) | Rectifier assembly machining method | |
| CN117620490A (en) | Titanium alloy crack repairing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |