CN102632370A - Manufacturing process of inner cover of total hydrogen cover-type furnace - Google Patents
Manufacturing process of inner cover of total hydrogen cover-type furnace Download PDFInfo
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Abstract
The invention discloses a manufacturing process of an inner cover of a total hydrogen cover-type furnace. The manufacturing process comprises the steps of preparing materials, blanking, parts processing, assembling and welding. All the materials are quality products, all the parts are subjected to blanking and processing by adopting numeric control modern machines, and design accuracy requirements are achieved; assembling is carried out by virtue of an annular tool, a conical tool, an inner welding tool and an outer welding tool according to a procedure, and welding on a circular seam, a straight slit and other parts is carried out according to the procedure; all the joints are provided with appropriate grooves, and different welding methods and materials are adopted according to different parts; and firstly spot welding for fixing is carried out and then symmetry welding in equally divided parts is carried out, interior of a barrel is welded while exterior of the barrel is subjected to back chipping dye detection and then the exterior of the barrel is welded. The manufacturing process disclosed by the invention has the beneficial effects that: compared with other manufacturing methods, the steps of the manufacturing process are appropriate, welding deformation is small, quality of a welding seam is high, and production efficiency is high; and by adopting the manufacturing process disclosed by the invention, actual detection shows that dimensions meet accuracy requirements and welding seam shooting inspection is passed.
Description
Technical field
The present invention relates to a kind of perhydro bell furnace inner cover, concrete relevant with its manufacture craft.
Background technology
Bell furnace is that a kind of stove seat is fixed; Removable or the heating mantles of heating mantles is fixed, the liftable batch furnace of stove seat, and in bell furnace, heat-treating is a kind of requisite technology in the cold rolled strip steel production process; Cold-strip steel is technical process such as process heating, insulation, cooling in bell furnace; Change the institutional framework of steel, improve mechanical performance, so bell furnace is widely used in band coil of strip protective gas annealing in process.During bell furnace work; The band coil of strip is contained in inner cover, and with the combustion gas heating, inner cover inside is highly purified hydrogen between inner cover and outer cover; The outside has 6 to 12 burners to carry out continuously or the circulation heat treated usually; Temperature can reach 800 to 1000 ℃, so inner cover is very strict to air-tightness, hear resistance and requirement of strength, and common preparation method can't reach designing requirement.For this reason, guarantee the serviceability of inner cover, improve moulding, assembling and the weldquality of inner cover, become the emphasis that inner cover is made.
Inner cover mainly is made up of 4 parts, is respectively lifting device, leading arm (opening), leading arm (remaining silent), inner cover cylindrical shell.End socket and inner cover cylindrical shell and flange in the bottom are housed under the lifting device successively, and two leading arm symmetries are contained on the flange in the bottom, and the inner cover cylindrical shell can be made up of multistage, like Fig. 1, shown in Figure 2.The manufacture difficulty of inner cover cylindrical shell is mainly reflected in following aspect greatly: 1, the inner cover cylindrical shell is pressed wave component by the T=6mm corrosion resistant plate; 2: weld seam is more, requires welding deformation amount less, and pressure-tight weld, and the film making grade is a GB3323 II level; 3: required precision is high, and the cylindrical shell butt joint requires unfitness of butt joint≤0.5mm, flange in the bottom flatness≤0.5mm.
Existing inner cover mainly adopts the turning rolls horizontal direction to make; Welding procedure is cylindrical shell circumferential weld integral solder basically; Make efficiency is lower, and welding deformation is wayward, and unfitness of butt joint can't guarantee; The flange in the bottom flatness needs after whole erection welding, to adopt large-scale boring and milling machine to process, and cost of manufacture is higher.
Summary of the invention
The manufacturing process that the purpose of this invention is to provide inner cover, this technology are beneficial to make efficiency height, making precision and sealing property and reach the inner cover designing requirement.
To achieve these goals, technical scheme of the present invention is: perhydro bell furnace inner cover manufacture craft is characterized in that it comprises following steps:
1) material is prepared to require: flange in the bottom 1 steel plate thickness must be than designing requirement+8 ~ 10mm, and bottom cylindrical shell steel plate 9, cylindrical shell 2 steel plates adopt the edging plate, length >=cylindrical shell girth 50mm, and all the other materials are all by designing requirement, and sheet material adopts the certified products steel plate;
2) blanking: flange in the bottom 1, supporting leg 8, supporting leg location-plate 10, leading arm installing plate 7 all adopt the digital control flame blanking; Blanking requires: flange in the bottom divides 1/4 circular arc blanking; In circle than the little 7 ~ 10mm of design radial, cylindrical is than the big 7 ~ 10mm of design radial, thickness is Duoed 8 ~ 10mm than designing requirement; Minimizing causes flange not have allowance because of distortion fervent and that welding brings; Supporting leg location-plate 10,7 blankings of leading arm installing plate than design Duo 0 ~+1mm, supporting leg location-plate 10, leading arm installing plate 7 linearitys and the pin≤1mm that goes here and there, supporting leg 8 is according to designing requirement;
Bottom cylindrical shell steel plate 9, cooling ring flat-plate 5 adopt the digital controlling plasma blanking; Blanking requires: bottom cylindrical shell steel plate 9 steel plate widths+5mm, linearity≤3mm; The blanking in 5 minutes 1/6 of cooling ring flat-plate, interior circle+2mm, cylindrical-2mm;
End socket 4 carries out blanking after launching according to the end socket size, splices behind the employing shearing machine shear, and the piece status requirement is with reference to the GB150 GB150-1998; Blanking requires: blanking than design size Duo 0 ~+1mm;
3) part processing: with the installed surface is benchmark, leading arm installing plate 7 contacted one side adopt milling machine to mill face with flange in the bottom 1, and with the machined surface key well; Processing request: it is key well with the machined surface that machined surface roughness 12.5, flatness 0.5mm, perpendicularity 0.2mm, installing hole and leading arm pre-install the back;
Bottom cylindrical shell steel plate 9 adopts edge milling machines to mill the limit and process bevel for welding; Processing request: angle is than design big by 0 ~+5 °, length than design size Duo 0 ~+1mm, width than design size many+2 ~+3mm; Linearity and string pin≤1mm, groove face roughness 12.5;
Adopt edge milling machines to process bevel for welding before the end socket 4 steel plates splicings, welding cuts into circle after accomplishing, and is adopting spinning machine to be processed into end socket, is processed into the groove that docks of end socket 4 and upper shell 22 then; Processing request: linearity≤1mm, groove face roughness 12.5;
Flange in the bottom 1 is processed at twice; (1). process after the assembly unit: the flange piece is spliced into circle, and the welding post-equalization is to flatness 2mm, and annealing in process adopts NC vertical lathe to process then; Processing request: the flange bottom thickness manys 5mm than designing requirement, flatness 0.5mm, and roughness 12.5, the inner cover hold-down ring is not processed; (2). with bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, the 10 welding back processing of supporting leg location-plate: the flange in the bottom 1 after bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, supporting leg location-plate 10 processed with 1 time according to designing requirement welds; Welding after vibration Ageing Treatment adopts NC vertical lathe to process then; Processing request: processing is according to design size processing, flatness 0.5mm, roughness 6.3, inner cover hold-down ring size ± 0.3mm;
4) assembling, welding:
⑴ be placed on end socket 4 on the frock platform, platform plane degree 0.5mm, and it is fixing that lifting device and end socket 4 with the platform are that benchmark is assembled, and then end socket 4 and lifting device position while welding adopted the symmetry welding, reduces welding deformation;
⑵ be placed on upper shell 22 on the frock platform; Annular frock 14 is mounted to the downward 50mm of upper shell 22 upper interface place; Adopt bolt with annular frock 14 lockings, end socket is mounted to upper interface, adopt misalignment between taper frock 15 adjustment end sockets and the upper shell 22; Adjust and carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified and fix, then symmetric points welding line position;
According to step ⑵ successively with assembling spot welding between lower shell 21 and the upper shell 22; Form the parts of end socket 4+ upper shell 22+ lower shell 21+ lower shell 21; On turning rolls, carry out the welding of weld seam 1, weld seam 2, weld seam 3 then, weld seam is divided into the welding of 8 equal portions symmetry.
⑷ join flange in the bottom 1 and bottom cylindrical shell steel plate 9 at the enterprising luggage of platform, be benchmark with flange in the bottom 1 upper surface, and cylindrical shell steel plate 9 assembling back height tolerance in bottom are 1mm; Divide 8 equal portions symmetry welding flange in the bottom 1 and bottom cylindrical shell steel plate 9, air ring 6 is installed then, divide the welding of 12 equal portions symmetry, cooling ring flat-plate 5 is installed then, divide the welding of 12 equal portions symmetry, reduce the flange in the bottom distortion that brings because of weld seam more; With the flange is benchmark, and supporting leg location-plate 10 and air ring 6 are carried out erection welding; The after vibration Ageing Treatment is accomplished in welding, processes flange bottom and inner cover hold-down ring at NC vertical lathe again;
⑸ be assembled to leading arm installing plate 7 after the secondary operations on the flange in the bottom, welding then;
⑹ the flange in the bottom that will assemble after accomplishing is placed on the frock platform; Adopt annular frock 14 to assemble with it lower shell 21; Adopt taper frock 15 adjustment misalignments; Adjust and carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified and fix, then symmetric points welding line position;
⑺ be assembled into integral body with inner cover, and weld seam H4 docking location adopts annular frock 14 to assemble with it, adopts taper frock 15 adjustment misalignments; Adjust and carry out spot welding and fix 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified; Weld on turning rolls symmetric points welding line position then, first welded seam H5; Welded seam H4 then, weld seam divide the welding of 8 equal portions symmetry;
Welding requirements: adopt φ 4 welding rods to weld between the flange in the bottom 1 of flange in the bottom position and the bottom cylindrical shell steel plate 9; All the other position weld seams of flange in the bottom adopt the gas shielded arc welding welding; It is to adopt the external welding frock that lower shell 21, upper shell 22 round as a ball splicings are welded on welding inside, welding tooling in adopting during outside weldings.End socket 4, lower shell 21, upper shell 22 splicing welding joints and butt weld adopt φ 1.2 solid welding wire pulse MAG modes to weld, and welding is the welding barrel earlier, and the cylindrical shell outside is welded in outside back chipping dye penetrant inspection then.
The invention has the beneficial effects as follows: compare with other preparation method, method step is proper, and welding deformation amount is little, and weldquality is high, and is beneficial to the make efficiency height; Make through this technology, each size of actual detected satisfies required precision, and the weld seam Radiographic test RT is qualified.
Description of drawings
Fig. 1 structure master of the present invention looks sketch map.
Fig. 2 structure schematic top plan view of the present invention.
Fig. 3 bottom cylindrical shell steel plate is the bevel for welding sketch map up and down.
The round as a ball butt joint groove of Fig. 4 bottom cylindrical shell steel plate sketch map.
Fig. 5 end socket steel plate splicing groove sketch map.
Fig. 6 end socket docks the groove sketch map with cylindrical shell.
Fig. 7 cylindrical shell steel plate butt joint sketch map.
Fig. 8 cylindrical shell steel plate splicing sketch map.
Fig. 9 flange in the bottom circular arc splicing groove sketch map.
Figure 10 annular tooling drawing.
Figure 11 taper tooling drawing.
Welding tooling figure in Figure 12 cylindrical shell.
Figure 13 cylindrical shell external welding tooling drawing.
Among the figure: 1-flange in the bottom; 2-inner cover cylindrical shell; 21-lower shell, 22-upper shell; 211-cylindrical shell inner face; 212-cylindrical shell outside; 3-lifting device; 4-end socket; 5-cooling ring flat-plate; 6-air ring; 7-leading arm installing plate; 71-leading arm opening; 72-leading arm is remained silent; 8-supporting leg; 9-bottom cylindrical shell steel plate; 10-supporting leg location-plate; 11-turnover oralia; 12-import and export upper plate; 13-bolt locked position; 14-annular frock; 15-taper frock; 16-interior welding tooling; 17-external welding frock; 18-inner cover hold-down ring; H1 ~ 5 are position while welding; A1 ~ 9 expression angles; L1 ~ 14 expression width.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further specified.
To shown in Figure 13, the invention discloses a kind of perhydro bell furnace inner cover manufacture craft like Fig. 1, its step is following:
1) material prepare to require: flange in the bottom 1 buying steel plate thickness must than for designing requirement+8 ~ 10mm (former because guarantee planeness of flange; The flatness of rear flange is accomplished in twice welding); Bottom cylindrical shell steel plate 9, cylindrical shell 2 steel plates adopt the edging plate, length >=cylindrical shell girth 50mm (prevent that flat shape four limit types from appearring in material, cause cylindrical shell can't be round as a ball); All the other materials are all by designing requirement, and sheet material is purchased the certified products steel plate;
2) blanking: flange in the bottom 1, supporting leg 8, supporting leg location-plate 10, leading arm installing plate 7 all adopt the digital control flame blanking; Blanking requires: flange in the bottom divides 1/4 circular arc blanking; Interior circle is than the little 7 ~ 10mm of design radial; Cylindrical is not than the big 7 ~ 10mm of design radial (preventing has processing capacity because of reasons such as equipment cause flange in numerical control blanking process); Thickness is Duoed 8 ~ 10mm than designing requirement, reduces because of earnestly and weld the distortion that brings and cause flange not have allowance.Supporting leg location-plate 10,7 blankings of leading arm installing plate than design Duo 0 ~+1mm, supporting leg location-plate 10, leading arm installing plate 7 linearitys and the pin≤1mm that goes here and there; Supporting leg 8 is according to designing requirement;
Bottom cylindrical shell steel plate 9, cooling ring flat-plate 5 adopt the digital controlling plasma blanking; Blanking requires: bottom cylindrical shell steel plate 9 steel plate widths+5mm, linearity≤3mm; The blanking in 5 minutes 1/6 of cooling ring flat-plate, interior circle+2mm, cylindrical-2mm (being convenient to cool off the installation and the welding of ring flat-plate);
End socket 4 carries out blanking after launching according to the end socket size, splices behind the employing shearing machine shear, and the piece status requirement is with reference to the GB150 GB150-1998; Blanking requires: blanking than design size Duo 0 ~+1mm;
3) part processing: with the installed surface is benchmark, leading arm installing plate 7 contacted one side adopt milling machine to mill face with flange in the bottom 1, and with the machined surface key well; Processing request: it is key well with the machined surface that machined surface roughness 12.5, flatness 0.5mm, perpendicularity 0.2mm, installing hole and leading arm pre-install the back;
Bottom cylindrical shell steel plate 9 adopts edge milling machines to mill the limit and process bevel for welding, 55 ° of the groove a2 that docks with lower shell 21, and top L1 0.5 mm, the bevel angle of docking with end flange 1 is 60 ° of a1, form is seen Fig. 3; 60 ° of the bevel angle a3 of round as a ball butt joint, L2 0.5 ~ 1 mm, L3 1 mm see Fig. 4; Processing request: angle should be than design big by 0 ~+5 °; Length than design size Duo 0 ~+1mm; Width than design size many+2 ~+3mm (upper surface distortion in the welding process; Can be benchmark with flange ground in the flange in the bottom secondary operations, with upper surface processing and assurance design size) be linearity and string pin≤1mm, groove face roughness 12.5;
Adopt edge milling machines to process bevel for welding before the splicing of end socket 4 steel plates, see Fig. 5, a4 60 ° ± 0.5, L4 0.5 ~ 1 mm, L5 1 mm; After the groove face welding completion, necessary dye penetrant inspection after the back root cleaning, (necessary 100% film making is handled after the welding completion to cut into circle after welding is accomplished; The qualified back circle of contact); Adopting spinning machine to be processed into end socket (200mm position, weld seam two ends need polish flat), be processed into docking of end socket 4 and lower shell 22 then, the lower shell groove is seen Fig. 6; A5 30 ° ± 0.5, L6 1 mm, processing request: linearity≤1mm, groove face roughness 12.5;
Flange in the bottom 1 is divided into twice processing; 1. process after the assembly unit: the flange circular arc is spliced into circle, and flange circular arc butt joint form is seen Fig. 9, and a8 and a9 are 35 °, L11 60 mm, L12 35 mm, L13 22 mm, L14 3 mm; (the flange welding need have more the turn-over welding to reduce welding deformation amount) welding post-equalization is stepped back processing to flatness 2mm, adopts NC vertical lathe to process then; Processing request: the flange bottom thickness manys 5mm than designing requirement, flatness 0.5mm, and roughness 12.5, the inner cover hold-down ring is not processed.2. with bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, the 10 welding back processing of supporting leg location-plate: the flange in the bottom 1 after bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, supporting leg location-plate 10 processed with 1 time according to designing requirement welds; Welding after vibration Ageing Treatment adopts NC vertical lathe to process then; Processing request: processing is according to design size processing, flatness 0.5mm, roughness 6.3, inner cover hold-down ring size ± 0.3mm;
4) assembling, welding:
⑴ be placed on end socket 4 on the frock platform, platform plane degree 0.5mm, and it is fixing that lifting device and end socket 4 with the platform are that benchmark is assembled, and then end socket 4 and lifting device position while welding adopted the symmetry welding, reduces welding deformation;
⑵ be placed on upper shell 22 on the frock platform; Annular frock 14 is mounted to the downward 50mm of upper shell 22 upper interface place; Adopt bolt with annular frock 14 lockings, end socket is mounted to upper interface, adopt misalignment between taper frock 15 adjustment end sockets and the upper shell 22; Adjust and carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified and fix, then symmetric points welding line position;
According to step ⑵ successively with assembling spot welding between lower shell 21 and the upper shell 22; Form the parts of end socket 4+ upper shell 22+ lower shell 21+ lower shell 21; On turning rolls, carry out the welding of weld seam H1, weld seam H2, weld seam H3 then; Weld seam is divided into 8 equal portions symmetry welding (must measure girth before the cylindrical shell butt joint, and match);
⑷ join flange in the bottom 1 and bottom cylindrical shell steel plate 9 at the enterprising luggage of platform, be benchmark with flange in the bottom 1 upper surface, and cylindrical shell steel plate 9 assembling back height tolerance in bottom are 1mm; Divide 8 equal portions symmetry welding flange in the bottom 1 and bottom cylindrical shell steel plate 9, air ring 6 is installed then, divide the welding of 12 equal portions symmetry, cooling ring flat-plate 5 is installed then, divide the welding of 12 equal portions symmetry, reduce the flange in the bottom distortion that brings because of weld seam more; With the flange is benchmark, and supporting leg location-plate 10 and air ring 6 are carried out erection welding; The after vibration Ageing Treatment is accomplished in welding, processes flange bottom and inner cover hold-down ring 18 at NC vertical lathe again;
⑸ be assembled to leading arm installing plate 7 after the secondary operations on the flange in the bottom, welding then;
⑹ the flange in the bottom that will assemble after accomplishing is placed on the frock platform; Adopt annular frock 14 to assemble with it lower shell 21; Adopt taper frock 15 adjustment misalignments; Adjust and carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified and fix, then symmetric points welding line position;
⑺ be assembled into integral body with inner cover, and weld seam H4 docking location adopts annular frock 14 to assemble with it, adopts taper frock 15 adjustment misalignments; Adjust and carry out spot welding and fix 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified; Weld on turning rolls symmetric points welding line position then, first welded seam H5; Welded seam H4 then, weld seam divide the welding of 8 equal portions symmetry;
Welding requirements adopts φ 4 welding rods to weld between the flange in the bottom 1 of flange in the bottom position and the bottom cylindrical shell steel plate 9; All the other position weld seams of flange in the bottom adopt the gas shielded arc welding welding; It is to adopt the external welding frock that lower shell 21, upper shell 22 round as a ball splicings are welded on welding inside; Welding tooling in adopting during outside weldings; See Figure 12,13, welding adopts semi-automatic solid welding wire pulse MAG mode to weld, and prevents to occur in the cylindrical shell welding process weld seam peach type.End socket 4, lower shell 21, upper shell 22 splicing welding joints and butt weld adopt φ 1.2 solid welding wire pulse MAG modes to weld, and bevel for welding is seen figure, and welding is the welding barrel earlier, and the cylindrical shell outside is welded in outside back chipping dye penetrant inspection then;
Inner cover cylindrical shell after welding accomplished prevents on the frock platform, through size detection: the flatness≤0.5mm of flange in the bottom 1, inner cover hold-down ring ± 0.3mm, cylinder roundness+2 ~-0mm, lifting device to podium level is poor≤3mm.Outward appearance detects: weldquality and moulding are good.The film making inspection: weld seam film making II level is all qualified.
Claims (1)
1. perhydro bell furnace inner cover manufacture craft is characterized in that it comprises following steps:
1) material is prepared to require: flange in the bottom steel plate thickness must be than designing requirement+8 ~ 10mm, and bottom cylindrical shell steel plate, cylindrical shell steel plate adopt the edging plate, length >=cylindrical shell girth 50mm, and all the other materials are all by designing requirement, and sheet material adopts the certified products steel plate;
2) blanking: flange in the bottom, supporting leg, supporting leg location-plate, leading arm installing plate all adopt the digital control flame blanking; Blanking requires: flange in the bottom divides 1/4 circular arc blanking; Interior circle is than the little 7 ~ 10mm of design radial; Cylindrical is than the big 7 ~ 10mm of design radial, and thickness is Duoed 8 ~ 10mm than designing requirement, supporting leg location-plate, the blanking of leading arm installing plate than design Duo 0 ~+1mm; Supporting leg location-plate, leading arm installing plate linearity and string pin≤1mm, supporting leg is according to designing requirement;
Bottom cylindrical shell steel plate, cooling ring flat-plate adopt the digital controlling plasma blanking; Blanking requires: bottom cylindrical shell steel plate steel plate width+5mm, linearity≤3mm; The cooling ring flat-plate divides 1/6 blanking, interior circle+2mm, cylindrical-2mm;
Lower shell, upper shell, air ring, import and export upper plate, turnover oralia adopt shearing machine; Blanking requires: the lower shell blanking than design size Duo 0 ~+1mm, the linearity and the pin≤1mm that goes here and there; The upper shell width is according to inner cover ripple quantity x0.6mm+ design size, linearity and string pin≤1mm; Air ring, turnover oralia, import and export upper plate are all by the designing requirement blanking;
End socket carries out blanking after launching according to the end socket size, splices behind the employing shearing machine shear, and the piece status requirement is with reference to the GB150 GB150-1998; Blanking requires: blanking than design size Duo 0 ~+1mm;
3) part processing: with the installed surface is benchmark, the leading arm installing plate contacted one side adopt milling machine to mill face with flange in the bottom, and with the machined surface key well; Processing request: it is key well with the machined surface that machined surface roughness 12.5, flatness 0.5mm, perpendicularity 0.2mm, installing hole and leading arm pre-install the back;
Bottom cylindrical shell steel plate adopts edge milling machines to mill the limit and process bevel for welding; Processing request: angle is than design big by 0 ~+5 °, length than design size Duo 0 ~+1mm, width than design size many+2 ~+3mm; Linearity and string pin≤1mm, groove face roughness 12.5;
Adopt edge milling machines to process bevel for welding before the end socket steel plate splicing, welding cuts into circle after accomplishing, and is adopting spinning machine to be processed into end socket, is processed into the groove that docks of end socket and upper shell then; Processing request: linearity≤1mm, groove face roughness 12.5;
Lower shell, upper shell adopt edge milling machines to mill the limit and process bevel for welding; Processing request: angle than actual big by 0 ~+5 °; Length than design size Duo 0 ~+1mm, width than design size many+2 ~+3mm linearity and string pin≤1mm, groove face roughness 12.5;
Lower shell, upper shell adopt corrugation forming machine that corrugating is installed, and the ripple tolerance be+1 ~-3mm, press 0 °, 90 °, 180 °, 270 ° position height of measurement cylindrical shell after the ripple moulding, difference in height ± 1mm;
Flange in the bottom is processed at twice; (1). process after the assembly unit: the flange piece is spliced into circle, and the welding post-equalization is to flatness 2mm, and annealing in process adopts NC vertical lathe to process then; Processing request: the flange bottom thickness manys 5mm than designing requirement, flatness 0.5mm, and roughness 12.5, the inner cover hold-down ring is not processed; (2). with bottom cylindrical shell steel plate, air ring, cooling ring flat-plate, supporting leg location-plate welding back processing: the flange in the bottom after bottom cylindrical shell steel plate, air ring, cooling ring flat-plate, supporting leg location-plate processed with 1 time according to designing requirement welds; Welding after vibration Ageing Treatment adopts NC vertical lathe to process then; Processing request: processing is according to design size processing, flatness 0.5mm, roughness 6.3, inner cover hold-down ring size ± 0.3mm;
4) assembling, welding:
⑴ be placed on end socket on the frock platform, platform plane degree 0.5mm, and it is fixing that lifting device and end socket with the platform are that benchmark is assembled, and then end socket and lifting device position while welding adopted the symmetry welding, reduces welding deformation;
⑵ be placed on upper shell on the frock platform; Annular frock is mounted to the downward 50mm of upper shell upper interface place; Adopt bolt that annular frock is locked, end socket is mounted to upper interface, adopt misalignment between taper frock adjustment end socket and the upper shell; Adjust and carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified and fix, then symmetric points welding line position;
⑶ successively with assembling spot welding between lower shell and the upper shell, form the parts of end socket 4+ upper shell+lower shell+lower shell according to step ⑵, on turning rolls, carries out the welding of weld seam 1, weld seam 2, weld seam 3 then, and weld seam is divided into the welding of 8 equal portions symmetry;
⑷ join flange in the bottom and bottom cylindrical shell steel plate at the enterprising luggage of platform, be benchmark with the flange in the bottom upper surface, and bottom cylindrical shell steel plate assembling back height tolerance is 1mm; Divide 8 equal portions symmetry welding flange in the bottom and bottom cylindrical shell steel plate, air ring is installed then, divide the welding of 12 equal portions symmetry, the cooling ring flat-plate is installed then, divide the welding of 12 equal portions symmetry, reduce the flange in the bottom distortion that brings because of weld seam more; With the flange is benchmark, and supporting leg location-plate and air ring are carried out erection welding; The after vibration Ageing Treatment is accomplished in welding, processes flange bottom and inner cover hold-down ring at NC vertical lathe again;
⑸ be assembled to the leading arm installing plate after the secondary operations on the flange in the bottom, welding then;
⑹ the flange in the bottom that will assemble after accomplishing is placed on the frock platform; Adopt annular frock to assemble with it lower shell; Adopt taper frock adjustment misalignment, adjust and carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified and fix, then symmetric points welding line position;
⑺ be assembled into integral body with inner cover, and weld seam H4 docking location adopts annular frock to assemble with it, adopts taper frock adjustment misalignment; Adjust and carry out spot welding and fix 0 ° of interface position, 90 °, 180 °, 270 ° respectively after qualified; Weld on turning rolls symmetric points welding line position then, first welded seam H5; Welded seam H4 then, weld seam divide the welding of 8 equal portions symmetry;
Welding requirements: adopt φ 4 welding rods to weld between the flange in the bottom of flange in the bottom position and the bottom cylindrical shell steel plate; All the other position weld seams of flange in the bottom adopt the gas shielded arc welding welding; It is to adopt the external welding frock that lower shell, the round as a ball splicing of upper shell are welded on welding inside; Welding tooling in adopting during outside weldings; End socket, lower shell, upper shell splicing welding joint and butt weld adopt φ 1.2 solid welding wire pulse MAG modes to weld; Welding is the welding barrel earlier, and the cylindrical shell outside is welded in outside back chipping dye penetrant inspection then.
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| CN106078093A (en) * | 2016-06-28 | 2016-11-09 | 中国南方航空工业(集团)有限公司 | The processing method of flanged (FLGD) thin-walled tube-type part |
| CN106078093B (en) * | 2016-06-28 | 2018-08-21 | 中国南方航空工业(集团)有限公司 | The processing method of flanged (FLGD) thin-walled tube-type part |
| CN108673062A (en) * | 2018-05-24 | 2018-10-19 | 江苏福坛车桥科技有限公司 | A kind of automobile wheel edge shell production method |
| CN108672888A (en) * | 2018-05-28 | 2018-10-19 | 张化机（苏州）重装有限公司 | A kind of manufacturing method of sea water desalination heat exchanger shell plate |
| CN110303227A (en) * | 2019-07-16 | 2019-10-08 | 山东核电设备制造有限公司 | A kind of welding of nuclear power large size penetration piece and after welding treatment method and its application |
| CN110303227B (en) * | 2019-07-16 | 2021-01-26 | 山东核电设备制造有限公司 | Nuclear power large-scale penetration piece welding and post-welding treatment method and application thereof |
| CN112427888A (en) * | 2020-11-04 | 2021-03-02 | 陕西广大重型机械有限公司 | Machining process for fan shell |
| CN112427888B (en) * | 2020-11-04 | 2023-12-12 | 陕西广大重型机械有限公司 | Fan shell processing technology |
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