CN102632370B - 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 Full Hydrogen Bell Type Annealing 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; in bell furnace, heat-treating is the requisite technique of one in cold rolled strip steel production process; cold-strip steel in bell furnace through heating, insulation, the technical process such as cooling; change the institutional framework of steel, improve mechanical performance, therefore bell furnace is widely used in band coil of strip protective gas annealing in process.When bell furnace work, band coil of strip is contained in inner cover, between inner cover and outer cover with gas heating, inner cover inside is highly purified hydrogen, outside has 6 to 12 burners to carry out continuously or circulating-heating processing conventionally, temperature can reach 800 to 1000 DEG C, and therefore inner cover is very strict to air-tightness, heat resistance and requirement of strength, and common preparation method cannot reach designing requirement.For this reason, ensure the serviceability of inner cover, improve moulding, assembling and the weldquality of inner cover, become the emphasis that inner cover is made.
Inner cover is mainly 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 lifting device successively, and two leading arm symmetries are contained on flange in the bottom, and inner cover cylindrical shell can be made up of multistage, as shown in Figure 1 and Figure 2.The manufacture difficulty of inner cover cylindrical shell is mainly reflected in greatly following aspect: 1, inner cover cylindrical shell is pressed wave component by T=6mm corrosion resistant plate; 2: weld seam is more, require welding deformation amount less, and pressure-tight weld, film making grade is GB3323 II level; 3: required precision is high, cylindrical shell docking requires unfitness of butt joint≤0.5mm, flange in the bottom flatness≤0.5mm.
Existing inner cover mainly adopts turning rolls horizontal direction to make, welding procedure is Circumferential Welds In Cylinders integral solder substantially, make efficiency is lower, welding deformation is wayward, unfitness of butt joint cannot ensure, flange in the bottom flatness need adopt large-scale boring and milling machine to process after overall erection welding, and cost of manufacture is higher.
Summary of the invention
The object of this invention is to provide the manufacturing process of inner cover, this technique be beneficial to make efficiency high, make precision and sealing property and reach inner cover designing requirement.
To achieve these goals, technical scheme of the present invention is: Full Hydrogen Bell Type Annealing 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 edging plate, length >=cylindrical shell girth 50mm, and all the other materials are all by designing requirement, and sheet material adopts 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 digital control flame blanking; Blanking requires: flange in the bottom divides 1/4 circular arc blanking, inner circle is than the little 7～10mm of design radial, cylindrical is than the large 7～10mm of design radial, many 8～the 10mm of Thickness Ratio designing requirement, reduce because of earnestly and the distortion that brings of welding cause flange without allowance, supporting leg location-plate 10,7 blankings of leading arm installing plate be than the many 0～+ 1mm of design, supporting leg location-plate 10, leading arm installing plate 7 linearitys and string pin≤1mm, and supporting leg 8 is according to designing requirement;
Bottom cylindrical shell steel plate 9, cooling ring flat-plate 5 adopt digital controlling plasma blanking; Blanking requires: bottom cylindrical shell steel plate 9 steel plate widths+5mm, linearity≤3mm; 5 point of 1/6 blanking of cooling ring flat-plate, inner circle+2mm, cylindrical-2mm;
Lower shell 21, upper shell 22, air ring 6, import and export upper plate 12, turnover oralia 11 adopt shearing machine shear; Blanking requires: lower shell 21 blankings are than the many 0～+ 1mm of design size, linearity and string pin≤1mm; Upper shell 22 width are according to inner cover ripple quantity x0.6mm+ design size, linearity and string pin≤1mm; Air ring 6, turnover oralia 11, import and export upper plate 12 are all by designing requirement blanking;
End socket 4 carries out blanking after according to end socket auger Spread plane dimension, splices after adopting shearing machine shear, and piece status requirement is with reference to GB150 GB150-1998; Blanking requires: blanking is than the many 0～+ 1mm of design size;
3) part processing: taking installed surface as benchmark, the one side that leading arm installing plate 7 is contacted with flange in the bottom 1 adopts milling machine milling face, taking machined surface as key well; Processing request: machined surface roughness 12.5 μ m, flatness 0.5mm, perpendicularity 0.2mm, installing hole and leading arm pre-install after taking machined surface as key well;
Bottom cylindrical shell steel plate 9 adopts edge milling machines carry out milling limit and process bevel for welding, processing request: angle is than large 0～+ 5 ° of design, the many 0～+ 1mm of Length Ratio design size, width than design size many+2～+ 3mm, linearity and string pin≤1mm, groove face roughness 12.5 μ m;
Before end socket 4 steel plate splicings, adopt edge milling machines to process bevel for welding, after having welded, cut into circle, adopting spinning machine to be processed into end socket, be then processed into the butting grooves of end socket 4 and upper shell 22; Processing request: linearity≤1mm, groove face roughness 12.5 μ m;
Lower shell 21, upper shell 22 adopt edge milling machines carry out milling limit and process bevel for welding, processing request: angle is than actual large 0～+ 5 °, the many 0～+ 1mm of Length Ratio design size, width than design size many+2～+ 3mm linearity and string pin≤1mm, groove face roughness 12.5 μ m;
Lower shell 21, upper shell 22 adopt corrugation forming machine that corrugating is installed, and ripple tolerance is+1～-3mm, after the moulding of pressure ripple, measure 0 ° of cylindrical shell, 90 °, 180 °, 270 ° position height, difference in height ± 1mm;
Flange in the bottom 1 is processed at twice; (1). assembled rear processing: flange piece is spliced into circle, and welding post-equalization is to flatness 2mm, and annealing in process, then adopts NC vertical lathe to process; Processing request: flange bottom thickness is than the many 5mm of designing requirement, flatness 0.5mm, roughness 12.5 μ m, inner cover hold-down ring is not processed; (2). processing after welding with bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, supporting leg location-plate 10: bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, the flange in the bottom 1 of supporting leg location-plate 10 according to designing requirement and after processing for 1 time are welded, welding after vibration Ageing Treatment, then adopts NC vertical lathe to process; Processing request: processing is according to design size processing, flatness 0.5mm, roughness 6.3 μ m, inner cover hold-down ring size ± 0.3mm;
4) assembling, welding:
(1) end socket 4 is placed on tooling platform, platform plane degree 0.5mm, assembles lifting device and end socket 4 fixingly taking platform as benchmark, then end socket 4 is adopted and is symmetrically welded with lifting device position while welding, reduces welding deformation;
(2) upper shell 22 is placed on tooling platform, annular frock 14 is mounted to the upper shell downward 50mm of 22 upper interface place, adopt bolt that annular frock 14 is locked, end socket is mounted to upper interface, adopt taper frock 15 to adjust misalignment between end socket and upper shell 22, adjust and qualifiedly carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively and fix, then symmetric points welding line position afterwards;
(3) (2) will between lower shell 21 and upper shell 22, assemble spot welding successively according to step, form the parts of end socket 4+ upper shell 22+ lower shell 21+ lower shell 21, then on turning rolls, carry out the welding of weld seam H1, weld seam H2, weld seam H3, weld seam is divided into 8 equal portions and is symmetrically welded.
(4) flange in the bottom 1 and bottom cylindrical shell steel plate 9 are joined at the enterprising luggage of platform, taking flange in the bottom 1 upper surface as benchmark, after 9 assemblings of bottom cylindrical shell steel plate, height tolerance is 1mm; Divide 8 equal portions to be symmetrically welded flange in the bottom 1 and bottom cylindrical shell steel plate 9, then air ring 6 is installed, point 12 equal portions are symmetrically welded, and then cooling ring flat-plate 5 is installed, and point 12 equal portions are symmetrically welded, and reduce the flange in the bottom distortion next because of weld seam multi-band; Taking flange as benchmark, supporting leg location-plate 10 and air ring 6 are carried out to erection welding; Weld after vibration Ageing Treatment, then processed flange bottom and inner cover hold-down ring at NC vertical lathe;
(5) leading arm installing plate 7 is assembled to after secondary operations on flange in the bottom to then welding;
(6) the flange in the bottom after assembling being completed is placed on tooling platform, adopt annular frock 14 to assemble with it lower shell 21, adopt taper frock 15 to adjust misalignment, adjust and qualifiedly carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively and fix, then symmetric points welding line position afterwards;
(7) inner cover is assembled into entirety, weld seam H4 docking location adopts annular frock 14 to assemble with it, adopt taper frock 15 to adjust misalignment, adjust and qualifiedly carry out spot welding and fix 0 ° of interface position, 90 °, 180 °, 270 ° respectively afterwards, then weld on turning rolls symmetric points welding line position, first welded seam H5, then welded seam H4, weld seam divides 8 equal portions to be symmetrically welded;
Welding requirements: adopt φ 4mm welding rod to weld between the flange in the bottom 1 of flange in the bottom position and bottom cylindrical shell steel plate 9; All the other position weld seams of flange in the bottom adopt gas shielded arc welding welding; It is to adopt external welding frock that lower shell 21, the round as a ball splicing of upper shell 22 are welded on welding inside, welding tooling in adopting when outside weldings.End socket 4, lower shell 21, upper shell 22 splicing welding joints and butt weld adopt φ 1.2mm solid welding wire pulse MAG mode to weld, and inner barrel is first welded in welding, and outside back chipping dye penetrant inspection, then welds cylindrical shell outside.
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 it is high to be beneficial to make efficiency; Manufacture by this technique, the each size of actual detection meets required precision, and weld seam Radiographic test RT is qualified.
Brief description of the drawings
Fig. 1 structure master of the present invention looks schematic diagram.
Fig. 2 structure schematic top plan view of the present invention.
The upper and lower bevel for welding schematic diagram of Fig. 3 bottom cylindrical shell steel plate.
The round as a ball butting grooves schematic diagram of Fig. 4 bottom cylindrical shell steel plate.
Fig. 5 end socket steel plate splicing groove schematic diagram.
Fig. 6 end socket and cylindrical shell butting grooves schematic diagram.
Fig. 7 cylindrical shell steel plate docking schematic diagram.
Fig. 8 cylindrical shell steel plate splicing schematic diagram.
Fig. 9 flange in the bottom circular arc splicing groove schematic diagram.
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.
In 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-locking 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 represent angle, L1～14 represent width.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further described.
As shown in figure 1 to figure 13, the invention discloses a kind of Full Hydrogen Bell Type Annealing Furnace inner cover manufacture craft, its step is as follows:
1) material prepare require: flange in the bottom 1 purchase steel plate thickness must than for designing requirement+8～10mm (former because ensure planeness of flange, twice welding completes the flatness of rear flange), bottom cylindrical shell steel plate 9, cylindrical shell 2 steel plates adopt edging plate, length >=cylindrical shell girth 50mm (prevents that flat shape four limit types from appearring in material, cause the cylindrical shell cannot be round as a ball), all the other materials are all by designing requirement, and sheet material is purchased 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 digital control flame blanking; Blanking requires: flange in the bottom divides 1/4 circular arc blanking, inner circle is than the little 7～10mm of design radial, cylindrical is than the large 7～10mm of design radial (preventing in numerical control blanking process because the reasons such as equipment cause flange without processing capacity), many 8～the 10mm of Thickness Ratio designing requirement, reduce because of earnestly and the distortion that brings of welding cause flange without allowance.Supporting leg location-plate 10,7 blankings of leading arm installing plate be than the many 0～+ 1mm of design, supporting leg location-plate 10, leading arm installing plate 7 linearitys and string pin≤1mm; Supporting leg 8 is according to designing requirement;
Bottom cylindrical shell steel plate 9, cooling ring flat-plate 5 adopt digital controlling plasma blanking; Blanking requires: bottom cylindrical shell steel plate 9 steel plate widths+5mm, linearity≤3mm; 5 point of 1/6 blanking of cooling ring flat-plate, inner circle+2mm, cylindrical-2mm (being convenient to installation and the welding of cooling ring flat-plate);
Lower shell 21, upper shell 22, air ring 6, import and export upper plate 12, turnover oralia 11 adopt shearing machine shear; Blanking requires: lower shell 21 blankings are than the many 0～+ 1mm of design size, linearity and string pin≤1mm; Upper shell 22 width are according to inner cover ripple quantity x0.6mm+ design size, linearity and string pin≤1mm; Air ring 6, turnover oralia 11, import and export upper plate 12 are all by designing requirement blanking;
End socket 4 carries out blanking after according to end socket auger Spread plane dimension, splices after adopting shearing machine shear, and piece status requirement is with reference to GB150 GB150-1998; Blanking requires: blanking is than the many 0～+ 1mm of design size;
3) part processing: taking installed surface as benchmark, the one side that leading arm installing plate 7 is contacted with flange in the bottom 1 adopts milling machine milling face, taking machined surface as key well; Processing request: machined surface roughness 12.5 μ m, flatness 0.5mm, perpendicularity 0.2mm, installing hole and leading arm pre-install after taking machined surface as key well;
Bottom cylindrical shell steel plate 9 adopts edge milling machines carry out milling limit and process bevel for welding, the groove a255 ° docking with lower shell 21, and top L10.5mm, the bevel angle of docking with end flange 1 is a160 °, form is shown in Fig. 3; The bevel angle a360 of round as a ball docking °, L20.5～1mm, L31mm, be shown in Fig. 4; Processing request: angle should be than large 0～+ 5 ° of design, the many 0～+ 1mm of Length Ratio design size, width than design size many+2～+ 3mm (upper surface distortion in welding process, can be in flange in the bottom secondary operations taking flange ground as benchmark, upper surface is processed and ensures design size) be linearity and string pin≤1mm, groove face roughness 12.5 μ m;
Before end socket 4 steel plate splicings, adopt edge milling machines to process bevel for welding, see Fig. 5, a460 ° ± 0.5, L40.5～1mm, L51mm, after groove face has welded, necessary dye penetrant inspection after back root cleaning, (welding must be processed after completing in 100% film making after having welded, to cut into circle, the qualified rear circle of contact), adopting spinning machine to be processed into end socket (200mm position, weld seam two ends need polish flat), then be processed into docking of end socket 4 and lower shell 22, lower shell groove is shown in Fig. 6, a530 ° ± 0.5, L61mm, processing request: linearity≤1mm, groove face roughness 12.5 μ m,
Lower shell 21, upper shell 22 adopt edge milling machines carry out milling limit and process bevel for welding, see Fig. 7, a660 ° ± 0.5, L70.5～1mm, L81mm; Processing request: angle should be than reality large 0～+ 5 °, the many 0～+ 1mm of Length Ratio design size, width than design size many+2～+ 3mm linearity and string pin≤1mm, groove face roughness 12.5 μ m; Between lower shell 21, upper shell 22, bevel for welding is shown in Fig. 8, a760 ° ± 0.5, L90.5～1mm, L101mm;
Lower shell 21, upper shell 22 adopt corrugation forming machine installation drawing design corrugating, and ripple tolerance is+1～-3mm, after the moulding of pressure ripple, measure 0 ° of cylindrical shell, 90 °, 180 °, 270 ° position height, difference in height ± 1mm;
Flange in the bottom 1 is divided into twice processing; 1. assembled rear processing: flange circular arc is spliced into circle, and flange circular arc docking form is shown in Fig. 9, a8 and a9 are 35 °, L1160mm, L1235mm, L1322mm, L143mm; (flange welding need have more turn-over and weld to reduce welding deformation amount) welding post-equalization, to flatness 2mm, is stepped back processing, then adopts NC vertical lathe to process; Processing request: flange bottom thickness is than the many 5mm of designing requirement, flatness 0.5mm, roughness 12.5 μ m, inner cover hold-down ring is not processed.2. with after bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5,10 welding of supporting leg location-plate process: bottom cylindrical shell steel plate 9, air ring 6, cooling ring flat-plate 5, the flange in the bottom 1 of supporting leg location-plate 10 according to designing requirement and after processing for 1 time are welded, welding after vibration Ageing Treatment, then adopts NC vertical lathe to process; Processing request: processing is according to design size processing, flatness 0.5mm, roughness 6.3 μ m, inner cover hold-down ring size ± 0.3mm;
4) assembling, welding:
(1) end socket 4 is placed on tooling platform, platform plane degree 0.5mm, assembles lifting device and end socket 4 fixingly taking platform as benchmark, then end socket 4 is adopted and is symmetrically welded with lifting device position while welding, reduces welding deformation;
(2) upper shell 22 is placed on tooling platform, annular frock 14 is mounted to the upper shell downward 50mm of 22 upper interface place, adopt bolt that annular frock 14 is locked, end socket is mounted to upper interface, adopt taper frock 15 to adjust misalignment between end socket and upper shell 22, adjust and qualifiedly carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively and fix, then symmetric points welding line position afterwards;
(3) (2) will between lower shell 21 and upper shell 22, assemble spot welding successively according to step, form the parts of end socket 4+ upper shell 22+ lower shell 21+ lower shell 21, then on turning rolls, carry out the welding of weld seam H1, weld seam H2, weld seam H3, weld seam is divided into 8 equal portions and is symmetrically welded (before cylindrical shell docking, must measure girth, and match);
(4) flange in the bottom 1 and bottom cylindrical shell steel plate 9 are joined at the enterprising luggage of platform, taking flange in the bottom 1 upper surface as benchmark, after 9 assemblings of bottom cylindrical shell steel plate, height tolerance is 1mm; Divide 8 equal portions to be symmetrically welded flange in the bottom 1 and bottom cylindrical shell steel plate 9, then air ring 6 is installed, point 12 equal portions are symmetrically welded, and then cooling ring flat-plate 5 is installed, and point 12 equal portions are symmetrically welded, and reduce the flange in the bottom distortion next because of weld seam multi-band; Taking flange as benchmark, supporting leg location-plate 10 and air ring 6 are carried out to erection welding; Weld after vibration Ageing Treatment, then processed flange bottom and inner cover hold-down ring 18 at NC vertical lathe;
(5) leading arm installing plate 7 is assembled to after secondary operations on flange in the bottom to then welding;
(6) the flange in the bottom after assembling being completed is placed on tooling platform, adopt annular frock 14 to assemble with it lower shell 21, adopt taper frock 15 to adjust misalignment, adjust and qualifiedly carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively and fix, then symmetric points welding line position afterwards;
(7) inner cover is assembled into entirety, weld seam H4 docking location adopts annular frock 14 to assemble with it, adopt taper frock 15 to adjust misalignment, adjust and qualifiedly carry out spot welding and fix 0 ° of interface position, 90 °, 180 °, 270 ° respectively afterwards, then weld on turning rolls symmetric points welding line position, first welded seam H5, then welded seam H4, weld seam divides 8 equal portions to be symmetrically welded;
Welding requirements, adopts φ 4mm welding rod to weld between the flange in the bottom 1 of flange in the bottom position and bottom cylindrical shell steel plate 9; All the other position weld seams of flange in the bottom adopt gas shielded arc welding welding; It is to adopt external welding frock that lower shell 21, the round as a ball splicing of upper shell 22 are welded on welding inside, welding tooling in adopting when outside weldings, see Figure 12,13, welding adopts semi-automatic solid welding wire pulse MAG mode to weld, and prevents from occurring in barrel soldering process weld seam peach type.End socket 4, lower shell 21, upper shell 22 splicing welding joints and butt weld adopt φ 1.2mm solid welding wire pulse MAG mode to weld, and bevel for welding is shown in figure, and inner barrel is first welded in welding, and outside back chipping dye penetrant inspection, then welds cylindrical shell outside;
Inner cover cylindrical shell after welding is completed prevents on tooling 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 poor≤3mm.Outward appearance detects: weldquality and moulding are good.Film making checks: weld seam film making II level is all qualified.
Claims (1)
1. Full Hydrogen Bell Type Annealing 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 increase by 8 ~ 10mm than designing requirement, bottom cylindrical shell steel plate, cylindrical shell steel plate adopt edging plate, length is more than or equal to cylindrical shell girth and adds 50mm, and all the other materials are all prepared by designing requirement, and sheet material adopts certified products steel plate;
2) blanking: flange in the bottom, supporting leg, supporting leg location-plate, leading arm installing plate all adopt digital control flame blanking; Blanking requires: flange in the bottom divides 1/4 circular arc blanking, flange in the bottom inner circle is than the little 7 ~ 10mm of design radial, flange in the bottom cylindrical is than the large 7 ~ 10mm of design radial, many 8 ~ the 10mm of Thickness Ratio designing requirement, supporting leg location-plate, the blanking of leading arm installing plate increase by 0 ~ 1mm than designing requirement, supporting leg location-plate, leading arm installing plate linearity and string pin are less than or equal to 1mm, and supporting leg is according to designing requirement blanking;
Bottom cylindrical shell steel plate, cooling ring flat-plate adopt digital controlling plasma blanking; Blanking requires: bottom cylindrical shell steel plate width adds 5mm, and bottom cylindrical shell steel plate linearity is less than or equal to 3mm; Cooling ring flat-plate divides 1/6 blanking, and cooling ring flat-plate inner circle adds 2mm, and cooling ring flat-plate cylindrical subtracts 2mm;
Lower shell, upper shell, air ring, import and export upper plate, turnover oralia adopt shearing machine shear; Blanking requires: lower shell blanking increases by 0 ~ 1mm than design size, and lower shell linearity and string pin are less than or equal to 1mm; Upper shell width is multiplied by 0.6mm according to inner cover ripple quantity and adds design size, and upper shell linearity and string pin are less than or equal to 1mm; Air ring, turnover oralia, import and export upper plate are all by designing requirement blanking;
End socket carries out blanking after according to end socket auger Spread plane dimension, splices after adopting shearing machine shear, and piece status requirement is with reference to GB150 GB150-1998; Blanking requires: blanking increases by 0 ~ 1mm than design size;
3) part processing: taking installed surface as benchmark, the one side that leading arm installing plate is contacted with flange in the bottom adopts milling machine milling face, taking machined surface as key well; Processing request: machined surface roughness is that 12.5 μ m, flatness are that 0.5mm, perpendicularity are 0.2mm, installing hole and leading arm pre-install after taking machined surface as key well;
Bottom cylindrical shell steel plate adopts edge milling machines carry out milling limit and process bevel for welding, processing request: angle increases by 0 ~ 5 ° than design size, Length Ratio design size increases by 0 ~ 1mm, width increases by 2 ~ 3mm than design size, bottom cylindrical shell steel plate linearity and string pin are less than or equal to 1mm, and groove face roughness is 12.5 μ m;
Before end socket steel plate splicing, adopt edge milling machines to process bevel for welding, after having welded, cut into circle, then adopt spinning machine to be processed into end socket, be then processed into the butting grooves of end socket and upper shell; Processing request: end socket steel plate linearity is less than or equal to 1mm, groove face roughness is 12.5 μ m;
Lower shell, upper shell adopt edge milling machines carry out milling limit and process bevel for welding, processing request: Length Ratio design size increases by 0 ~ 1mm, width increases by 2 ~ 3mm than design size, and lower shell, upper shell linearity and string pin are less than or equal to 1mm, and groove face roughness is 12.5 μ m;
Lower shell, upper shell adopt corrugation forming machine that corrugating is installed, and ripple tolerance be+1mm ~-3mm, after the moulding of pressure ripple, measure 0 ° of cylindrical shell, 90 °, 180 °, 270 ° position height, and difference in height is+1mm ~-1mm ";
Flange in the bottom is processed at twice; (1). assembled rear processing: flange piece is spliced into circle, and welding post-equalization is to flatness 2mm, and annealing in process, then adopts NC vertical lathe to process; Processing request: flange bottom thickness increases 5mm than designing requirement, flatness is 0.5mm, and roughness is 12.5 μ m, and inner cover hold-down ring is not processed; (2). processing after welding with bottom cylindrical shell steel plate, air ring, cooling ring flat-plate, supporting leg location-plate: bottom cylindrical shell steel plate, air ring, cooling ring flat-plate, the flange in the bottom of supporting leg location-plate according to designing requirement and after processing for 1 time are welded, welding after vibration Ageing Treatment, then adopts NC vertical lathe to process; Processing request: processing is according to design size processing, and flatness is 0.5mm, and roughness is 6.3 μ m, be of a size of ± 0.3mm of inner cover hold-down ring;
4) assembling, welding:
(1) end socket is placed on tooling platform, platform plane degree is 0.5mm, lifting device and end socket is assembled fixing taking platform as benchmark, then end socket is adopted and is symmetrically welded with lifting device position while welding, minimizing welding deformation;
(2) upper shell is placed on tooling 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 taper frock to adjust misalignment between end socket and upper shell, adjust and qualifiedly carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively and fix, then symmetric points welding line position afterwards;
(3) (2) will between lower shell and upper shell, assemble spot welding successively according to step, form the parts of end socket+upper shell+lower shell, then on turning rolls, carry out the welding of weld seam H1, weld seam H2, weld seam H3, weld seam is divided into 8 equal portions and is symmetrically welded;
(4) flange in the bottom and bottom cylindrical shell steel plate are joined at the enterprising luggage of platform, taking flange in the bottom upper surface as benchmark, after the assembling of bottom cylindrical shell steel plate, height tolerance is 1mm; Divide 8 equal portions to be symmetrically welded flange in the bottom and bottom cylindrical shell steel plate, then air ring is installed, point 12 equal portions are symmetrically welded, and then cooling ring flat-plate is installed, and point 12 equal portions are symmetrically welded, and reduce the flange in the bottom coming because of weld seam multi-band and are out of shape; Taking flange as benchmark, supporting leg location-plate and air ring are carried out to erection welding; Weld after vibration Ageing Treatment, then processed flange bottom and inner cover hold-down ring at NC vertical lathe;
(5) leading arm installing plate is assembled to after secondary operations on flange in the bottom to then welding;
(6) the flange in the bottom after assembling being completed is placed on tooling platform, adopt annular frock to assemble with it lower shell, adopt taper frock to adjust misalignment, adjust and qualifiedly carry out spot welding 0 ° of interface position, 90 °, 180 °, 270 ° respectively and fix, then symmetric points welding line position afterwards;
(7) inner cover is assembled into entirety, weld seam H4 docking location adopts annular frock to assemble with it, adopt taper frock to adjust misalignment, adjust and qualifiedly carry out spot welding and fix 0 ° of interface position, 90 °, 180 °, 270 ° respectively afterwards, then weld on turning rolls symmetric points welding line position, first welded seam H5, then welded seam H4, weld seam divides 8 equal portions to be symmetrically welded;
Welding requirements: adopt φ 4mm welding rod to weld between the flange in the bottom of flange in the bottom position and bottom cylindrical shell steel plate; All the other position weld seams of flange in the bottom adopt gas shielded arc welding welding; Lower shell, the round as a ball splicing of upper shell must adopt external welding frock while being welded on welding inside, welding tooling in adopting when outside weldings, end socket, lower shell, upper shell splicing welding joint and butt weld adopt φ 1.2mm solid welding wire pulse MAG mode to weld, inner barrel is first welded in welding, outside back chipping dye penetrant inspection, then welds cylindrical shell outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210130312.5A CN102632370B (en) | 2012-04-28 | 2012-04-28 | Manufacturing process of inner cover of total hydrogen cover-type furnace |
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| CN110666378A (en) * | 2019-08-19 | 2020-01-10 | 武汉船用机械有限责任公司 | Manufacturing method of bracket structural part |
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| CN110666378B (en) * | 2019-08-19 | 2021-08-24 | 武汉船用机械有限责任公司 | Manufacturing method of bracket structural part |
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