CN104097037A - Machining process for nuclear main pump guide blade of nuclear power station - Google Patents
Machining process for nuclear main pump guide blade of nuclear power station Download PDFInfo
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- CN104097037A CN104097037A CN201410293631.7A CN201410293631A CN104097037A CN 104097037 A CN104097037 A CN 104097037A CN 201410293631 A CN201410293631 A CN 201410293631A CN 104097037 A CN104097037 A CN 104097037A
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- 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
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
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Abstract
The invention relates to a machining process for a nuclear main pump guide blade of a nuclear power station. An integral blade wing type is machined on an integral solid forge piece, the difficulty is larger compared with that of an impeller in the nuclear main pump, and the method is different from the casting or welding method in the traditional blade manufacturing method. The machined surface roughness can achieve Ra3.2. The roughness can achieve more than Ra0.8 after the bad surface is polished. In blade detection, the molded line of the blade is scanned by adopting a joint arm, and the scanned data are compared with data of a standard three dimensional model. The final detection result through a simulation part and multiple products shows that the blade wing type of the guide blade fully accords with the design paper demands.
Description
Technical field: the processing technology that the present invention relates to Nuclear Power Station main pump stator.
Background technology: the stator that two generations added in core main pump is one of parts of the most critical in main pump, and be the important hydraulic part that directly affects pump lift, flow.At present, in two generations, added the equipment that core main pump is unique realization production domesticization in China's nuclear island of nuclear power station.Domestic existing blade machining process is to adopt individual blade processing to be then welded to one by one on stator wheel hub mostly, or adopt the whole stator casting out then to polish, the stator producing of these two kinds of methods is of low quality, the former exists welding precision not high,, there is welding stress in post welding distortion.The latter exists castability also not high, often there is casting sand hole, crackle, polishing blade difficulty, is difficult to guarantee vane airfoil profile, and the stator reliability that produces of two kinds of methods to be all difficult to meet in core main pump operating pressure 17.16MP, temperature be 350 ℃ of requirements under this operating mode.At present, China does not also process the producer of core main pump stator, and external colleague's processing also adopts three-dimensional lathe to add auxiliary mould processing, and the blade processing and water passage surface roughness reach Ra12.5, so manual grinding occupies very large proportion.The shape of gate vane channel be can affect like this, the main pump lift of core, efficiency affected.The manufacture of common stator is generally divided into two kinds of methods, casts and welds, and the stator strength of materials of casting is poor, precision is low, and the molded line of blade, by manual grinding, is difficult to guarantee the molded line of its design, both have influence on service life, also just had influence on the power of whole main pump motor group.In core pump, stator need to bear HTHP, and its material property of casting stator is poor, so can shorten the life-span, can increase the repair rate of nuclear power station, even there will be accident.If the blade of stator is fixed the mode that adopts welding, be difficult to control welding deformation amount of vane, increase welding difficulty, the annealing of the blade of postwelding, polishing are very also difficult to ensure card vane type line, the requirements such as weld strength of carrying HTHP are also difficult to meet the service requirement of core pump, for efficiency and security, the maintenance of unit, all make troubles.
Summary of the invention:
The object of this invention is to provide that a kind of crudy is good, process operation is stable, shorten fabrication cycle, the processing technology of the Nuclear Power Station main pump stator of increasing work efficiency.Technical scheme of the present invention is: a kind of processing technology of Nuclear Power Station main pump stator, core main pump stator is processed by unitary solid forging (1), stator is by 14 blades (21), be evenly distributed between wheel hub (24) and outer shroud (25), between adjacent two blades (21), wheel hub (24) and outer shroud (25), form runner (23), the junction of blade (21) and wheel hub (24), outer shroud (25) is with knuckle (22) and be smoothly connected, and concrete technology step is:
The first step is to select roughing face cutter (4), by the angle of inclination of blade, rough mill out one perpendicular to the inclined-plane 5 with blade tangent line, rotating speed 800rpm, vertical step pitch is 1mm, feed engagement 0.6mm, and object is for next step easy drilling, can not produce cutter relieving, because cutting output is larger, and be inclined to one side milling, when starting to carry out rough cut, need the handle of a knife that design strength is large;
Second step is that design selects suitable drill bit (6) in the angle perpendicular to inclined-plane, to drill through die cavity through hole (7), rotating speed 500rpm, feed engagement 0.1mm;
The 3rd step uses the face milling cutters of D43L400 by the diameter of the through hole having bored (7) expanded hole, rotating speed 1200rpm, and feed engagement 0.45mm, can increase like this working (machining) efficiency and also be conducive to better arrange and cut;
The 4th step is carried out two interlobate pocketings, rotating speed 900rpm, feed engagement 0.5mm with the face milling cutters of D63L210;
The 5th step is deepened two interlobate pocketings, rotating speed 900rpm, feed engagement 0.5mm with the face milling cutters of D63L260;
The 6th step is carried out the milling of the stator blade entrance point blade chamfering that wherein a side shape is a bit recessed, rotating speed 1500rpm, feed engagement 0.5mm with the face milling cutters of D40L350;
The 7th step further deepens along blade the milling that the 6th step is put blade die cavity by the method for the 6th step;
The 8th step is processed interior some the protruding blade of opposite side shape of stator die cavity near the milling of outside fillet with the face milling cutters of D63L200;
The 9th step is processed interior the 8th processing of stator die cavity near the position of interior rounded corner with the face milling cutters of D63L200;
The face milling cutters of the tenth use D40L350 are further deepened the 7th step milling;
The 11 step deepens with D40L350 the milling that the 9th step is put; The 12 step continues to deepen with D40L350 the milling that the 8th step is put;
The 13 step is deepened two interlobate die cavity millings with the face milling cutters of D63L310;
The 14 step with the face milling cutters of D63L350 by pocket machining to communicating;
The 15 step translation-angle, the middle part and the bottom that with the face milling cutters machining blade curve of D40L400, fall in, until bottom is led in milling;
The 16 step is rough milled by the chamfering that the rose cutter of R8L230 carries out blade edge;
The 17 step is carried out half finish-milling of blade surface with the rose cutter of R8L230;
The 18 step is carried out five axle half finish-millings with R8L400 to the middle part of die cavity and bottom, by above 18 steps, half finish-milling of die cavity runner (9) all directions is cut, for next step finish-milling ready;
The 19 rose cutter for step (8) carries out five shaft five linkage profile finish-milling, rotating speed 3000rpm, feed engagement 0.15mm, the taper handle of a knife that knife bar cutter used is special designs and interchangeable rose cutter, by five-axle linkage fine finishining blade die cavity and edge chamfer, along the edge of die cavity runner (9), walk Corkscrews like the curve of rectangle, from top to middle part again to bottom, add five shaft five linkage in man-hour, main shaft is the various angles of conversion constantly, workpiece is also being followed rotation simultaneously, by this each die cavity of method cyclic process, process complete stator aerofoil profile and die cavity runner (9),
The 20 step is processed all holes and groove,
The 21 step is to carry out the polishing of blade, utilize the pneumatic grinding machine of rotating speed 18000rpm, install respectively sized flap wheel, fiber dish, fiber wheel, wool dish vane airfoil profile is carried out to manual polishing, polishing only makes surface reach better effect, more than surface roughness can reach Ra0.8, polishing does not change the shape and size of blade, pre-made allowance when just fine finishining is fallen in polishing.Finally with joint arm, the aerofoil profile of blade is scanned, carry out outline line contrast with the model having designed, after polishing detection is qualified, complete the processing of core main pump stator.
Advantage of the present invention and technique effect are: by stator drawing, carry out blade programming, adopt applicable digital control vertical machining tool and the equipment of numerical control five-shaft linkage machining center, mix special tooling, the special holder cutter of design, preferred suitable cutting parameter, can on solid forging, process complete stator blade, exempt the unfavorable factor that traditional stator blade manufacture adopts the method for casting or welding to bring.Not only Design of Dies is complicated for traditional casting stator, manufacture difficulty, and foundry goods stator easily produces numerous defects, as drop, sand washing etc., easily produce pore, pin hole, shrinkage porosite, loose etc., easily there are numerous shortcomings such as crackle, physical property, mechanical property and chemical composition be defective in surface, the various shortcomings of foundry goods stator all cannot meet the design parameter requirement of core main pump stator.Also there are some problems in traditional welding method, such as stretch into volume while welding different solder joints, constantly change, welding current produces fluctuation, causes each quality of welding spot non-constant, and welding stator blade process is to operate in narrow space, so cannot directly observe, welding quality can only lean on engineer testing and destructive testing to check, the electric welding time is short, and welding heat fluctuation is larger, be difficult to control, in welding, produce the defects such as rosin joint and sealing-off.In nuclear power station main pump running, stator is to bear the high temperature of 350 degree and the pressure of 17.16MPA, so the stator of casting and the stator of welding are to meet the requirement that stator moves for a long time under the condition of HTHP.With respect to above-mentioned two kinds of methods, the first, the blade that the machining manufacture method that the present invention adopts machines has been avoided above-mentioned all shortcomings, can meet the requirement of core main pump completely.Steel forgings material physical property, mechanical property and chemical composition etc. can reach requirement, be difficult for producing defect, the various performances of material have obtained effective control, have avoided because of casting produces or welding blade produces distortion, sand holes, pore etc. and because welding the various defect of easy generation etc.The second, the stator precision of blades processing is high, completely by numerical control program operation, Digit Control Machine Tool processing, surface roughness has approached drawing requirement, only need do surface finish again and process, and can be better than drawing requirement, guaranteed design accuracy requirement, guarantee the design parameters such as main pump lift and efficiency, met the requirement of the long-term highly effective and safe stable operation of nuclear power station main pump stator, improved product quality, met the designing requirement of core main pump, guaranteed the performance of core main pump operation and stablized.The 3rd, the technical process that the present invention manufactures stator is easier, clean, environmental protection, and safety, can or not waste non-renewable resources because of the pernicious gas of casting and welding generation yet, has reduced the danger of casting and manual welding simultaneously yet.The 4th, efficient, the present invention has shortened the manufacturing cycle, is 1/3rd of the manufacturing cycle of abroad going together, and has reduced and has manufactured related work post and equipment, has reduced manufacturing cost.
Contrast external nuclear power station stator manufacturing process: two generations of external several grasps add the method that the producer of main pump manufacturing technology also adopts solid forging directly to process blade and manufacture stator, but the surface roughness of the stator of their processing can only reach Ra12.5 reluctantly, 10mm surplus has been stayed on the surface of blade, polishing by for a long time guarantees size and reduces surface roughness, this by the method for polishing, control blade curve will be with operator's experience, human factor is very large, if operator lacks blade polishing experience, the change that polishing is easy to produce blade wheel profile, cause overproof, waterpower curve is exerted an influence, the blade of the present invention processing with respect to the advantage of external main pump manufacturing technology producer is, blade surface only needs polishing, can not exert an influence to blade wheel profile, with the processing of core main pump stator of the present invention, replace manual polishing, guaranteed the blade curve required precision of design, improved reliability, the generation of the situation such as can not cause that stator is scrapped because of operator's error.The method applied in the present invention has improved the working (machining) efficiency of stator, and crudy is also better than external colleague, can greatly improve the accuracy of manufacture.Surface roughness after processing can reach Ra3.2, only blade surface is carried out to polishing, more than stator roughness can reach Ra0.8 after processing.The joint arm that the detection utilization Germany of blade manufactures scans the molded line of blade, scans rear and threedimensional model contrast.Measurement result as shown in Figure 9, stator scanning percent deviation and as shown in figure 10, the standard deviation of scanning after stator processing, the radius of measure-ball is 3mm, be that X-axis 3mm actual deviation is 0,93% deviation concentrates between 0.00～0.35mm, this is mainly the polishing surplus of staying, by the blade deviation of design drawing requirement, be 0～0.30mm, actual processing result meets processing technology and requires, stator after polishing meets designing requirement, and the final result of detection refers to figure nine and figure ten.Through the contrast of simulating piece and many product part final detection result, show the complete no design drawing requirement that meets of vane airfoil profile of stator.The stator of manufacturing by the method, respond well after full flow test.Be applied in Fuqing Fan family mountain nuclear power station main pump and Pakistani project nuclear power station main pump project.
Meaning of the present invention will promote the localization process of core main pump greatly.Before, the processing and manufacturing technology of stator is developed country's monopolization always, and the present invention will break this deadlock, realize the production domesticization that stator is manufactured, stator processing and manufacturing the domestic heart that turns to nuclear power station---the production domesticization of main pump manufacture provides safeguard.
Accompanying drawing explanation:
Fig. 1 stator forging drawing
Fig. 2 is the nonstandard knife bar in turning stator water side
The water side turning special non-standard knife bar cutter of Fig. 3 stator uses schematic diagram
Fig. 4 is that stator is by certain angle milling plane figure
Fig. 5 is that stator drills through die cavity runner figure by vertical plane
Fig. 6 is stator milling die cavity runner figure
Fig. 7 is that milling special tooling is used schematic diagram
Fig. 8 is stator final products graphics
Fig. 9 is stator scanning percent deviation
Figure 10 is the standard deviation of scanning after stator processing
The specific embodiment:
As shown in Figure 1, a kind of processing technology of Nuclear Power Station main pump stator, core main pump stator is processed by unitary solid forging 1, as shown in Figure 8, stator, by 14 blades 21, is evenly distributed between wheel hub 24 and outer shroud 25, and adjacent two blades 21, wheel hub 24 and 25 of outer shrouds form runner 23, the junction of blade 21 and wheel hub 24, outer shroud 25 is with knuckle 22 and be smoothly connected, and concrete technology step is:
As shown in Figure 4, the first step is to select roughing face cutter 4 (D63L150 is that diameter is the long 150mm of 63mm), by the angle of inclination of blade, rough mill out one perpendicular to the inclined-plane 5 with blade tangent line, rotating speed 800rpm, vertical step pitch is 1mm, feed engagement 0.6mm, object is for next step easy drilling, can not produce cutter relieving, because cutting output is larger, and be inclined to one side milling, when starting to carry out rough cut, need the handle of a knife that design strength is large;
As shown in Figure 5, second step is that design selects suitable drill bit 6 (D80L395) in the angle perpendicular to inclined-plane, to drill through die cavity through hole 7, rotating speed 500rpm, feed engagement 0.1mm;
The 3rd step uses the face milling cutters of D43L400 by the diameter of the through hole having bored 7 expanded holes, rotating speed 1200rpm, and feed engagement 0.45mm, can increase like this working (machining) efficiency and also be conducive to better arrange and cut;
The 4th step is carried out two interlobate pocketings, rotating speed 900rpm, feed engagement 0.5mm with the face milling cutters of D63L210;
The 5th step is deepened two interlobate pocketings, rotating speed 900rpm, feed engagement 0.5mm with the face milling cutters of D63L260;
The 6th step is carried out the milling of the stator blade entrance point blade chamfering that wherein a side shape is a bit recessed, rotating speed 1500rpm, feed engagement 0.5mm with the face milling cutters of D40L350;
As shown in Figure 6, the 7th step further deepens along blade the milling that the 6th step is put blade die cavity by the method for the 6th step;
The 8th step is processed interior some the protruding blade of opposite side shape of stator die cavity near the milling of outside fillet with the face milling cutters of D63L200;
The 9th step is processed interior the 8th processing of stator die cavity near the position of interior rounded corner with the face milling cutters of D63L200;
The face milling cutters of the tenth use D40L350 are further deepened the 7th step milling;
The 11 step deepens with D40L350 the milling that the 9th step is put; The 12 step continues to deepen with D40L350 the milling that the 8th step is put;
The 13 step is deepened two interlobate die cavity millings with the face milling cutters of D63L310;
The 14 step with the face milling cutters of D63L350 by pocket machining to communicating;
The 15 step translation-angle, the middle part and the bottom that with the face milling cutters machining blade curve of D40L400, fall in, until bottom is led in milling;
The 16 step is rough milled by the chamfering that the rose cutter of R8L230 carries out blade edge;
The 17 step is carried out half finish-milling of blade surface with the rose cutter of R8L230;
The 18 step is carried out five axle half finish-millings with R8L400 to the middle part of die cavity and bottom, by above 18 steps, half finish-milling of die cavity runner 9 all directions is cut, for next step finish-milling ready;
The 19 rose cutter 8 for step (R8L400) carries out five shaft five linkage profile finish-milling, rotating speed 3000rpm, feed engagement 0.15mm, the taper handle of a knife that knife bar cutter used is special designs and interchangeable rose cutter, by five-axle linkage fine finishining blade die cavity and edge chamfer, along the edge of die cavity runner 9, walk Corkscrews like the curve of rectangle, from top to middle part again to bottom, add five shaft five linkage in man-hour, main shaft is the various angles of conversion constantly, workpiece is also being followed rotation simultaneously, by this each die cavity of method cyclic process, process complete stator aerofoil profile and die cavity runner 9,
The 20 step is processed all holes and groove,
The 21 step is to carry out the polishing of blade, utilize the pneumatic grinding machine of rotating speed 18000rpm, install respectively sized flap wheel, fiber dish, fiber wheel, wool dish vane airfoil profile is carried out to manual polishing, polishing only makes surface reach better effect, more than surface roughness can reach Ra0.8, polishing does not change the shape and size of blade, pre-made allowance when just fine finishining is fallen in polishing.Finally with joint arm, the aerofoil profile of blade is scanned, carry out outline line contrast with the model having designed, after polishing detection is qualified, complete the processing of core main pump stator.
As shown in Figure 2, the nonstandard knife bar 2 in Special purpose turning stator water side, be divided into, lower two parts, the first half is according to the Interface design of AC20 lathe, employing hexagon socket head cap screw is fixed, the latter half shape and angle are according to the shape of stator water side runner 3, and consider that the part material shape machining away is annular cornice, general knife bar is designed to be able to be installed, as shown in Figure 3, the mode of knife bar of being installed can meet the form of processing stator water side runner 3 and the cylindrical of wheel hub 24 simultaneously, also can meet the interior anchor ring of processing stator outlet edge outer shroud 25 runners, while processing inside and outside circle respectively, do not interfere mutually, special non-standard knife bar material selection 45# forged steel, solid forging processing, prevent that knife bar from producing the phenomenons such as cutter relieving due to insufficient rigidity, by the water side turning special non-standard knife bar cutter 2 thick fine finishining of stator, can complete the shape processing of stator water side 3 and curved surface runner thereof.
As shown in Figure 7, milling special tooling is: by upper, lower seam is with being installed on five axle machining center workbench by certain tolerance fit requirement and with the carcass 13 of pin-and-hole location, its kingpin hole drops in the pin-and-hole of five axle machining center workbench after packing alignment pin 10 into, and in utilizing, hexagonal M16 screw 12 is incorporated into 8 of carcasses on workbench with b28T type slide block 11, wherein interior hexagonal M16 screw 12 falls into the counterbore of carcass 13, b28T type slide block 11 is put into the standard keyway of platen, stator upper surface male half coupling is dropped into the position that the recessed seam of carcass 13 coordinates, pressing plate 14 is pushed down stator step, with M24 bolt 15, pressing plate 14 is compressed, above with cover plate 16 and M24 pull bar 17, thickening washer 19 and M24 nut 18 are strained stator on carcass 13, after clamping workpiece without centering, alignment pin 10 by workbench center gets final product centering center, for preventing workpiece rotation, with alignment pin 20, stator and carcass 13 are located.
Claims (3)
1. the processing technology of a Nuclear Power Station main pump stator, it is characterized in that: core main pump stator is processed by unitary solid forging (1), stator is by 14 blades (21), be evenly distributed between wheel hub (24) and outer shroud (25), between adjacent two blades (21), wheel hub (24) and outer shroud (25), form runner (23), the junction of blade (21) and wheel hub (24), outer shroud (25) is with knuckle (22) and be smoothly connected, and concrete technology step is:
The first step is to select roughing face cutter (4), by the angle of inclination of blade, rough mill out one perpendicular to the inclined-plane 5 with blade tangent line, rotating speed 800rpm, vertical step pitch is 1mm, feed engagement 0.6mm, and object is for next step easy drilling, can not produce cutter relieving, because cutting output is larger, and be inclined to one side milling, when starting to carry out rough cut, need the handle of a knife that design strength is large;
Second step is that design selects suitable drill bit (6) in the angle perpendicular to inclined-plane, to drill through die cavity through hole (7), rotating speed 500rpm, feed engagement 0.1mm;
The 3rd step uses the face milling cutters of D43L400 by the diameter of the through hole having bored (7) expanded hole, rotating speed 1200rpm, and feed engagement 0.45mm, can increase like this working (machining) efficiency and also be conducive to better arrange and cut;
The 4th step is carried out two interlobate pocketings, rotating speed 900rpm, feed engagement 0.5mm with the face milling cutters of D63L210;
The 5th step is deepened two interlobate pocketings, rotating speed 900rpm, feed engagement 0.5mm with the face milling cutters of D63L260;
The 6th step is carried out the milling of the stator blade entrance point blade chamfering that wherein a side shape is a bit recessed, rotating speed 1500rpm, feed engagement 0.5mm with the face milling cutters of D40L350;
The 7th step further deepens along blade the milling that the 6th step is put blade die cavity by the method for the 6th step;
The 8th step is processed interior some the protruding blade of opposite side shape of stator die cavity near the milling of outside fillet with the face milling cutters of D63L200;
The 9th step is processed interior the 8th processing of stator die cavity near the position of interior rounded corner with the face milling cutters of D63L200;
The face milling cutters of the tenth use D40L350 are further deepened the 7th step milling;
The 11 step deepens with D40L350 the milling that the 9th step is put; The 12 step continues to deepen with D40L350 the milling that the 8th step is put;
The 13 step is deepened two interlobate die cavity millings with the face milling cutters of D63L310;
The 14 step with the face milling cutters of D63L350 by pocket machining to communicating;
The 15 step translation-angle, the middle part and the bottom that with the face milling cutters machining blade curve of D40L400, fall in, until bottom is led in milling;
The 16 step is rough milled by the chamfering that the rose cutter of R8L230 carries out blade edge;
The 17 step is carried out half finish-milling of blade surface with the rose cutter of R8L230;
The 18 step is carried out five axle half finish-millings with R8L400 to the middle part of die cavity and bottom, by above 18 steps, half finish-milling of die cavity runner (9) all directions is cut, for next step finish-milling ready;
The 19 rose cutter for step (8) carries out five shaft five linkage profile finish-milling, rotating speed 3000rpm, feed engagement 0.15mm, the taper handle of a knife that knife bar cutter used is special designs and interchangeable rose cutter, by five-axle linkage fine finishining blade die cavity and edge chamfer, along the edge of die cavity runner (9), walk Corkscrews like the curve of rectangle, from top to middle part again to bottom, add five shaft five linkage in man-hour, main shaft is the various angles of conversion constantly, workpiece is also being followed rotation simultaneously, by this each die cavity of method cyclic process, process complete stator aerofoil profile and die cavity runner (9),
The 20 step is processed all holes and groove,
The 21 step is to carry out the polishing of blade, utilize the pneumatic grinding machine of rotating speed 18000rpm, install respectively sized flap wheel, fiber dish, fiber wheel, wool dish vane airfoil profile is carried out to manual polishing, polishing only makes surface reach better effect, more than surface roughness can reach Ra0.8, polishing does not change the shape and size of blade, pre-made allowance when just fine finishining is fallen in polishing.Finally with joint arm, the aerofoil profile of blade is scanned, carry out outline line contrast with the model having designed, after polishing detection is qualified, complete the processing of core main pump stator.
2. the processing technology of a kind of Nuclear Power Station main pump stator according to claim 1, it is characterized in that: the nonstandard knife bar in Special purpose turning stator water side (2), be divided into, lower two parts, the first half is according to the Interface design of AC20 lathe, employing hexagon socket head cap screw is fixed, the latter half shape and angle are according to the shape of stator water side runner (3), and consider that the part material shape machining away is annular cornice, general knife bar is designed to be able to be installed, the mode of knife bar of being installed can meet the form of processing stator water side runner (3) and the cylindrical of wheel hub (24) simultaneously, also can meet the interior anchor ring of processing stator outlet edge outer shroud (25) runner, while processing inside and outside circle respectively, do not interfere mutually, special non-standard knife bar material selection 45# forged steel, solid forging processing, prevent that knife bar from producing the phenomenons such as cutter relieving due to insufficient rigidity, by the thick fine finishining of the water side turning special non-standard knife bar cutter (2) of stator, can complete the shape processing of stator water side (3) and curved surface runner thereof.
3. the processing technology of a kind of Nuclear Power Station main pump stator according to claim 1, it is characterized in that: milling special tooling is: by upper, lower seam is with being installed on five axle machining center workbench by certain tolerance fit requirement and with the carcass (13) of pin-and-hole location, its kingpin hole drops in the pin-and-hole of five axle machining center workbench after packing alignment pin (10) into, and in utilizing hexagonal M16 screw (12) with b28T type slide block (11) by carcass (8) being incorporated on workbench, wherein interior hexagonal M16 screw (12) falls into the counterbore of carcass (13), b28T type slide block (11) is put into the standard keyway of platen, stator upper surface male half coupling is dropped into the position that the recessed seam of carcass (13) coordinates, pressing plate (14) is pushed down stator step, with M24 bolt (15), pressing plate (14) is compressed, above with cover plate (16) and M24 pull bar (17), thickening washer (19) and M24 nut 18 are strained stator on carcass (13), after clamping workpiece without centering, alignment pin (10) by workbench center gets final product centering center, for preventing workpiece rotation, with alignment pin (20), stator and carcass (13) are located.
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| CN106448772A (en) * | 2016-08-25 | 2017-02-22 | 天津市华天世纪机械有限公司 | Five-shaft processing nuclear power housing |
| CN106425579A (en) * | 2016-11-16 | 2017-02-22 | 四川省自贡市海川实业有限公司 | Closed integral blade disc machining clamping system |
| CN107511719A (en) * | 2017-09-05 | 2017-12-26 | 哈尔滨汽轮机厂有限责任公司 | A kind of turbine rotor is to wheel hole machined alignment device and method |
| CN113523718A (en) * | 2021-07-08 | 2021-10-22 | 哈尔滨电气动力装备有限公司 | Manufacturing process of nuclear main pump bearing guide ring key groove of nuclear power station |
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