CN114083229B - Method for manufacturing annular thick plate magnet yoke - Google Patents
Method for manufacturing annular thick plate magnet yoke Download PDFInfo
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- CN114083229B CN114083229B CN202111299282.6A CN202111299282A CN114083229B CN 114083229 B CN114083229 B CN 114083229B CN 202111299282 A CN202111299282 A CN 202111299282A CN 114083229 B CN114083229 B CN 114083229B
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Abstract
The invention discloses a method for manufacturing an annular thick plate magnet yoke, which comprises the steps of manufacturing a magnet yoke steel plate, welding the magnet yoke steel plate, stacking the magnet yoke steel plate to form a semi-finished magnet yoke module, roughly turning the magnet yoke module, finely turning, finely milling and drilling the magnet yoke module, cleaning and drying the magnet yoke module, pre-assembling the magnet yoke and painting. The invention is particularly suitable for the production and the manufacture of the magnetic yoke of a high-water-head, large-capacity and high-rotating-speed unit, a plurality of magnetic yoke steel plates are processed into finished magnetic yoke modules together, the consistency of the magnetic yoke steel plates is ensured, the consistency of each section of the magnetic yoke modules is improved by using the magnetic yoke modules of the same finished product as reference processing, the processing difficulty of the annular thick plate magnetic yoke is reduced, the size is detected in a pre-assembly mode, the field installation period is shortened, the repeatability is strong, the method efficiency is high, the economic benefit is obvious, and the use prospect is wide.
Description
Technical Field
The invention relates to the technical field of hydraulic mechanical equipment, in particular to a method for manufacturing an annular thick plate magnetic yoke.
Background
The generator motor for pumped storage is basically characterized by high rotating speed, large capacity and double steering. The high-capacity and high-water-head pumping and storing unit has the advantages that when the high-speed operation is carried out, the centrifugal force borne by a single magnetic pole can reach ten thousand tons, in addition, the pumping and storing unit not only has high rotating speed, but also needs to be started and stopped frequently, so the fatigue strength is checked, the annular thick plate magnetic yoke has higher strength relative to the laminated magnetic yoke, can bear larger magnetic pole centrifugal force, has higher rigidity and stronger stability when the high-speed operation is carried out, is particularly suitable for the high-rotating-speed unit, and is very favorable for the long-term, safe and stable operation of the unit. Although the annular thick-plate magnet yoke has a plurality of advantages, the manufacturing method of the annular thick-plate magnet yoke is not available in domestic industry at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for manufacturing an annular thick-plate magnetic yoke.
The purpose of the invention is realized by the following technical scheme: the manufacturing method of the annular thick plate magnetic yoke comprises the following steps:
s1, cutting a steel plate into a plurality of semi-finished magnetic yoke steel plates according to a design drawing of a magnetic yoke, and chamfering the semi-finished magnetic yoke steel plates to obtain a plurality of finished magnetic yoke steel plates;
s2, measuring unevenness and thickness of the plurality of magnetic yoke steel plates in the step S1, and welding a plurality of magnetic pole landing blocks and a plurality of ventilation blades to the plurality of magnetic yoke steel plates;
s3, stacking the plurality of magnetic yoke steel plates obtained in the step S2 through tensioning screws to obtain a plurality of sections of semi-finished magnetic yoke modules;
s4, mounting a plurality of hinged bolts on the first section of the semi-finished magnetic yoke module;
s5, marking a magnetic pole center line and various processing lines on the multi-section semi-finished magnetic yoke module in the step S4;
s6, roughly turning T-shaped grooves, balancing weight block mounting holes, drilling excitation lead clamp mounting holes, magnetic yoke floating stop plate mounting holes and magnetic pole key pressing plate holes on the plurality of sections of semi-finished magnetic yoke modules according to the plurality of processing lines;
s7, tapping threads on the balance weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating stop plate mounting hole and the magnetic pole key press plate hole, mounting a brake ring plate on the first section of the semi-finished magnetic yoke module, and scribing a T-shaped groove final processing line on the sections of the semi-finished magnetic yoke module;
s8, roughly milling T-shaped grooves on the multiple sections of the semi-finished magnet yoke modules according to the T-shaped groove final processing line, and then laminating part of the semi-finished magnet yoke modules through tool screws;
s9, performing finish turning on the inner circle and the outer circle of part of the semi-finished magnet yoke module and milling a magnet yoke key groove;
s10, according to the positions of the magnetic yoke key grooves, finely milling T grooves, tapping centripetal screw holes and parallel screw holes in part of the semi-finished magnetic yoke modules to obtain part of the finished magnetic yoke modules, splitting the part of the finished magnetic yoke modules, and taking out a section of the finished magnetic yoke modules from the part of the finished magnetic yoke modules to assemble with the rest of the semi-finished magnetic yoke modules;
s11, correcting the rest semi-finished magnet yoke modules by taking the finished magnet yoke module at one section as a reference, and finely turning the rest semi-finished magnet yoke modules into inner and outer circles and milling a magnet yoke key groove;
s12, correcting the rest semi-finished magnet yoke modules by using the finished magnet yoke module at one section, drilling the centripetal screw holes and the parallel screw holes on the rest semi-finished magnet yoke modules, and finely milling T-shaped grooves to obtain the rest finished magnet yoke modules;
s13, cleaning and drying the multiple sections of finished magnet yoke modules;
s14, pre-assembling the magnet yoke according to the design drawing of the magnet yoke, measuring data of the magnet yoke, and disassembling and recording the magnet yoke when the data meet requirements;
s15, painting the magnet yoke in the step S14.
Preferably, the step S2 includes the following steps:
s21, carrying out sand blasting and painting on a plurality of magnetic yoke steel plates, and then leveling the plurality of magnetic yoke steel plates by using an oil press;
s22, measuring and marking the thicknesses of the plurality of magnetic yoke steel plates, and uniformly matching the magnetic yoke steel plates according to the thickness deviation values of the plurality of magnetic yoke steel plates;
s23, placing a plurality of magnetic yoke steel plates on a platform, and welding the magnetic pole falling-stopping blocks with the magnetic yoke steel plates according to a design drawing of a magnetic yoke to obtain the magnetic yoke steel plates with the magnetic pole falling-stopping blocks;
s24, tightening the magnetic conduction block of the magnetic yoke steel plate in the step S23 and the ventilation blade through a process bolt, and then welding;
and S25, performing MT flaw detection on the welding seam of the magnetic pole landing block according to a design drawing of the magnetic yoke.
Preferably, the step S3 includes the following steps:
s31, drilling tensioning screw mounting holes in the plurality of magnetic yoke steel plates, and measuring the thicknesses of the plurality of magnetic yoke steel plates;
s32, after the thicknesses of the plurality of magnetic yoke steel plates are measured, matching and stacking are carried out according to the thicknesses of the plurality of magnetic yoke steel plates, and a multi-section semi-finished magnetic yoke module is obtained;
s33, installing tensioning screws on the plurality of sections of semi-finished magnet yoke modules in the step S32;
s34, after all the tensioning screws are fastened, preheating nuts of the tensioning screws, and welding the nuts with the sections of the semi-finished magnet yoke modules;
s35, marking and positioning the multiple sections of the semi-finished magnet yoke modules, and then drilling and reaming bolt mounting holes on the multiple sections of the semi-finished magnet yoke modules;
and S36, carrying out PT flaw detection on the nut in the step S34.
Preferably, the step S4 includes the following steps:
s41, pre-installing a plurality of hinged bolts in hinged bolt installation holes of the semi-finished magnet yoke module at the first section, then tensioning the hinged bolts and recording the elongation of the hinged bolts;
s42, after the hinged bolt is tightened, welding two chamfered parts of the semi-finished magnet yoke module of the first section;
s43, after the chamfer part is welded, welding the hinged bolt and the first section of the semi-finished magnetic yoke module;
s44, carrying out PT flaw detection on the hinged bolt and the welding seam of the multi-section semi-finished magnet yoke module;
and S45, performing appearance treatment on the multiple sections of the semi-finished magnet yoke modules.
Preferably, the step S6 includes the following steps:
s61, roughly turning inner and outer circles on the sections of the semi-finished magnet yoke modules according to various machining lines, and punching corner points of the T-shaped grooves on the sections of the semi-finished magnet yoke modules;
s62, drilling the balancing weight block mounting holes on the head section and the tail section of the semi-finished magnet yoke module, and drilling the excitation lead clamp mounting holes on the tail section of the semi-finished magnet yoke module;
s63, drilling and tapping a magnetic yoke floating stop plate mounting hole on the penultimate section of the semi-finished magnetic yoke module;
and S64, drilling and tapping the magnetic pole key pressing plate mounting holes in the multiple sections of the semi-finished magnetic yoke modules.
Preferably, the step S7 includes the following steps:
s71, rechecking the balancing weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating-stop plate mounting hole and the magnetic pole key pressing plate hole, and drilling and tapping the balancing weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating-stop plate mounting hole and the magnetic pole key pressing plate hole;
s72, turning a brake ring plate mounting surface on the first section of the semi-finished magnet yoke module, pre-mounting a brake ring plate on the brake ring plate mounting surface, drilling a brake ring plate mounting hole on the brake ring plate mounting surface, and marking a pairing mark on the brake ring plate mounting surface and the brake ring plate;
and S73, rechecking the balancing weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating stop plate mounting hole and the magnetic pole key pressing plate hole, and repositioning the T-shaped groove final processing line on the multi-section semi-finished magnetic yoke module.
Preferably, the step S10 includes the following steps:
s101, placing part of the semi-finished magnet yoke module on a turntable for leveling and rounding;
s102, setting a starting point by taking the magnetic yoke key groove as a reference;
s103, finely milling the T-shaped groove in part of the semi-finished magnet yoke module;
s104, milling the centripetal screw holes and the parallel screw holes in part of the semi-finished magnet yoke modules;
s105, tapping the centripetal screw hole and the parallel screw holes to obtain a partial finished magnet yoke module;
s106, splitting part of the finished magnet yoke modules, and assembling a section of the finished magnet yoke module and the rest of the semi-finished magnet yoke modules from the part of the finished magnet yoke modules through a tooling screw rod.
Preferably, the step S12 includes the following steps:
s121, hanging a section of finished magnet yoke module and the rest of semi-finished magnet yoke modules to a turntable, correcting by taking the magnet yoke modules as a reference, and milling T-shaped grooves in the rest of semi-finished magnet yoke modules;
s122, drilling a centripetal screw hole and a parallel screw hole in the rest semi-finished magnet yoke modules;
and S123, finely milling a T-shaped groove in the residual semi-finished magnet yoke module and removing the tool screw to obtain the residual finished magnet yoke module.
Preferably, the step S14 includes the following steps:
s141, hoisting the rotor support into a platform, and fixing the rotor support;
s142, adjusting the rotor support to be horizontal;
s143, cleaning each part of the magnetic yoke;
s144, inserting a driving key into the T-shaped key, hoisting the finished magnet yoke module of the first section into the platform, adjusting the level, and driving the driving key tightly after the finished magnet yoke module of the first section is qualified in level;
s145, hanging the rest finished magnet yoke modules into the platform one by one and installing to obtain a semi-finished magnet yoke;
s146, measuring the dislocation of the T-shaped groove;
s147, pre-installing a magnetic yoke floating stop plate, an adjusting pad and a fixing bolt on the magnetic yoke according to a design drawing of the magnetic yoke, and adjusting a gap between the magnetic yoke floating stop plate and the rotor central body;
s148, measuring concentricity of the finished magnet yoke module and the rotor support;
s149, uniformly installing the coil and the excitation lead wire in the magnetic yoke according to a design drawing of the magnetic yoke, checking the concentricity and the verticality of a detection coil supporting hole, an excitation lead wire clamp installing hole and a coil interpolar connecting hole of the magnetic yoke, and removing the coil and the excitation lead wire after the detection is qualified;
s1410, measuring and recording the flatness of the brake ring plate and the size of the magnetic pole falling block;
s1411, marking the multiple sections of finished magnet yoke modules;
and S1412, splitting the magnetic yoke.
Preferably, the step S5 includes the following steps:
s51, marking out a center line in the height direction and a processing line of the ventilating vanes on the plurality of sections of semi-finished magnet yoke modules according to the processing allowance of the ventilating vanes;
and S52, scribing T-shaped groove processing lines and inner and outer circle processing lines on the plurality of sections of semi-finished magnet yoke modules.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention is particularly suitable for the production and the manufacture of the magnetic yoke of a high-water-head, large-capacity and high-rotating-speed unit by the manufacturing method of the magnetic yoke of the annular thick plate, a plurality of magnetic yoke steel plates are processed into the finished magnetic yoke modules together, the consistency of the magnetic yoke steel plates is ensured, the consistency of the magnetic yoke modules at each section is improved by using the magnetic yoke modules of the same finished product as the reference for processing, the processing difficulty of the magnetic yoke of the annular thick plate is reduced, the size is detected by a pre-assembling mode, the field installation period is shortened, the repeatable operability is strong, the method efficiency is high, the economic benefit is obvious, and the use prospect is wide.
Drawings
FIG. 1 is a top view of an annular thick plate yoke of the present invention;
FIG. 2 is an enlarged view at U of FIG. 1 of the annular thick plate yoke of the present invention;
FIG. 3 is a cross-sectional view at A of FIG. 1 of an annular thick plate yoke of the present invention;
FIG. 4 is a top view at W of FIG. 3 of the annular thick plate yoke of the present invention;
FIG. 5 is an enlarged view at W of FIG. 3 of the annular thick plate yoke of the present invention;
FIG. 6 is a right side view of the annular thick plate yoke of the present invention;
reference numbers for parts in the drawings: 1-a hole for coil support; 2-excitation lead clamp mounting holes; 3-tensioning screw mounting holes or hinging bolt mounting holes; 4-a ventilation blade; 5-magnetic pole landing block; 6-magnetic conduction block; 7-T groove; 8-a brake ring plate mounting hole; 9-a mounting hole of a magnetic yoke wind-blocking ring; 10-tensioning screw connecting holes by damping rings; 11-balancing weight block mounting holes; 12-interelectrode wind deflector mounting holes; 13-yoke key slot; 14-coil interelectrode connection hole; 15-a magnet yoke floating stop plate mounting hole; 16-chamfered portions; 17-yoke inside diameter; 18-assembling a magnetic yoke floating stop plate; 19-a yoke module; 1901-segment 1 yoke module; 1902-2 nd section yoke module; 1903-segment 3 yoke module; 1904-section 4 yoke module; 1905-5 th segment yoke module; 1906-6 th segment yoke module; 1907-segment 7 yoke module; 1908-segment 8 yoke module; 1909-section 9 yoke module; 1910-yoke steel plate; 20-reaming the bolt; 21-tensioning screw; 22-yoke outside diameter; 23-a fixing bolt; 24-studs; 25-vertical rib hook surface; 26-pole key pressing plate mounting holes; 27-brake ring plate mounting surface; 28. pole center line.
Detailed Description
The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.
The annular thick plate magnetic yoke has high requirements on the concentricity of the inner diameter and the outer diameter, the magnetic yoke key (corresponding to the magnetic yoke key groove 13), the size of the magnetic pole key (corresponding to the T-shaped groove 7) and the form and position tolerance, and after the sections are stacked, the magnetic yoke key grooves 13 and the T-shaped grooves 7 are staggered greatly as a whole, so that the tightness of the magnetic yoke key and the magnetic pole key is influenced. Particularly, the size is large, the weight is heavy, a conversion machine tool is needed during processing of the magnetic yoke, namely, after the inner circle, the outer circle and the magnetic yoke key groove 13 are processed by the vertical lathe, the conversion machine tool needs to be converted into a boring machine for processing the T-shaped groove 7, and in addition, when the processing length of the Z axis of the vertical lathe is insufficient and the bearing capacity of a rotary table is insufficient, the whole processing of each section cannot be realized, and only the mode of processing in sections and transferring stations can be adopted. The determination of the processing reference of each section and the maintenance of the reference during station transfer are key points of processing control, so that the whole processing process is complex in process, difficult to control and high in processing difficulty.
As shown in fig. 1 to 6, the method for manufacturing the annular thick-plate yoke includes the steps of:
s1, cutting a semi-finished yoke steel plate 1910: according to a design drawing of a magnetic yoke, a plurality of semi-finished magnetic yoke steel plates 1910 are scribed on a high-strength steel plate, then chamfering processing is carried out on the outer edges of the semi-finished magnetic yoke steel plates 1910, and the chamfered edges are polished smoothly, so that a plurality of finished magnetic yoke steel plates 1910 are obtained.
The unevenness of the yoke steel plate 1910 directly affects the gap between the stacked plates, which causes the height of each yoke module 19 to be different, and affects the final size and cooling effect of the ventilation blades 4. Therefore, the integral unevenness of the steel plate after blanking and before stacking is required to be less than or equal to 3mm and far exceeds the national standard. This puts high demands on the steel plate manufacturer, blanking, welding and stacking. Besides making strict requirements for the unevenness of the steel plate in the steel plate purchase contract, the steel plate is sent out to staff with rich experience before leaving the factory, and is subjected to joint inspection with a steel mill, and if necessary, the shape of the steel plate is adjusted by using a 4000T gantry oil press of the steel mill. Before blanking, the unevenness of each steel plate is measured again, the numerical control cutting sequence is optimized, and the deformation is reduced.
S2, measuring the unevenness and the thickness of the plurality of yoke steel plates 1910 in the step S2, and then welding a plurality of magnetic pole falling blocks 5 and a plurality of ventilation blades 4 on the yoke steel plates 1910; long-time stacking, the blanking piece generates aging deformation, the unevenness of the plate needs to be accurately measured again by the level gauge before stacking, the shape is adjusted when necessary, and the integral unevenness is adjusted to be below 3mm so as to meet the design requirement. The leveling rod can be used for pre-checking, then the leveling instrument is used for measuring, and a plurality of measuring points are selected properly at the position with larger deformation. By referring to the measurement data, the gap of each part is considered, and the rolling direction of the magnetic yoke steel plate 1910 is staggered by one pole, so that the height of the whole periphery of the magnetic yoke tends to be consistent, and the strength of the whole periphery is uniform.
S21, after sand blasting and painting are carried out on a plurality of yoke steel plates 1910, leveling is carried out on the plurality of yoke steel plates 1910 by an oil press, and unevenness of the plurality of yoke steel plates 1910 is guaranteed;
s22, measuring the thickness of each magnetic yoke steel plate 1910 by adopting a cross line of plus X and plus Y, marking the thickness by using paint, and uniformly matching according to the thickness deviation value of each magnetic yoke steel plate 1910 to ensure that the peripheral heights of the magnetic yoke steel plates 1910 are consistent;
s23, placing the magnetic yoke steel plate 1910 on a platform, and welding the magnetic pole falling block 5 and the magnetic yoke steel plate 1910 according to a design drawing of a magnetic yoke to obtain the magnetic yoke steel plate 1910 with the magnetic pole falling block 5;
s24, welding the magnetic conduction blocks 6 on the magnetic yoke steel plate 1910 and the ventilation blades 4 after being tightened by adopting back-to-back process bolts, wherein welding deformation can be controlled by adopting the mode;
s25, during welding, the yoke steel plate 1910 is taken as a high-strength quenched and tempered steel plate, the yoke steel plate 1910 needs to be preheated before welding, and edge deformation of the yoke steel plate 1910 is controlled; MT flaw detection is carried out on the welding seam of the magnetic pole landing block 5 according to a design drawing of a magnetic yoke, so that welding deformation can be reduced;
and S3, stacking a plurality of magnetic yoke steel plates 1910 to obtain a multi-section semi-finished magnetic yoke module 19.
S31, tightening screw mounting holes 3 (two circles of screw holes close to the inner diameter of the first section to the ninth section of the magnetic yoke modules 19 and one circle of screw holes close to the outer diameter of the second section to the ninth section of the magnetic yoke modules 19) on the plurality of magnetic yoke steel plates 1910, and measuring the thicknesses of the plurality of magnetic yoke steel plates 1910; the yoke steel plate 1910 may be deformed with age by being stacked for a long time. Before stacking, the unevenness of the yoke steel plate 1910 needs to be accurately measured again by a level gauge, and if necessary, shape adjustment is carried out, so that the integral unevenness is required to be adjusted to be less than 3 mm. The leveling rod can be used for pre-checking, then the leveling instrument is used for measuring, and a plurality of measuring points are selected properly at the position with larger deformation. By referring to the measurement data and considering the gaps of all parts, the magnetic yoke steel plate 1910 is staggered by one pole in the rolling direction, so that the heights of the whole peripheries of the magnetic yokes tend to be consistent, and the strength of the whole periphery is uniform.
S32, after the thicknesses of the plurality of yoke steel plates 1910 are measured, matching and stacking are carried out according to the thicknesses of the yoke steel plates 1910, so that the machining allowance of each part is uniform when the yoke steel plates 1910 are stacked, and a semi-finished yoke module 19 is obtained; when necessary, pressing the semi-finished magnet yoke module 19 in place by using an oil press, welding a lapping block (removing a lapping plate after fastening a tensioning screw 21) on the excircle of the semi-finished magnet yoke module 19, and welding a stop rib at an interelectrode ventilation ditch of the semi-finished magnet yoke module 19 (before five sections of magnet yoke steel plates 1910 are laminated, removing the stop rib after the semi-finished magnet yoke module 19 is determined not to turn over again, and protecting a processed plane);
s33, installing the tensioning screws 21 on the tensioning screw installation holes 3 in two circles on the inner sides of the plurality of magnetic yoke steel plates 1910, checking each machining size before tensioning, fastening the tensioning screws 21 after the qualified products are guaranteed, enabling the polished rod parts of the tensioning screws 21 to be attached to the tensioning screw installation holes 3 of the magnetic yoke steel plates 1910, and symmetrically tensioning the tensioning screws 21 for multiple times in the fastening process to prevent the thickness of the whole section of semi-finished magnetic yoke module 19 from generating deviation; during the laminating operation, each yoke steel plate 1910 and the stacked working surface need to be cleaned, and foreign matters cannot be mixed between the plates.
S34, after all the tensioning screws 21 are fastened, preheating the nuts of the tensioning screws 21 before welding, welding two symmetrical surfaces of the nuts to prevent the nuts from loosening, and performing PT inspection on the welded positions after welding;
s35, marking and positioning the semi-finished magnet yoke module 19, and drilling and reaming a bolt mounting hole 3 (located on the outer diameter side of the first section of the magnet yoke module 19);
and S36, carrying out PT flaw detection on the nut of the tensioning screw 21.
And S4, mounting the hinged bolt 20 on the semi-finished magnetic yoke module 19 of the first section.
S41, pre-installing a plurality of hinged bolts 20 on the hinged bolt installation holes 3 of the first section of semi-finished magnetic yoke module 19, checking each machining size of the semi-finished magnetic yoke module 19, then tensioning the hinged bolts 20 and recording the elongation of the hinged bolts 20;
s42, after the hinged bolt 20 is tightened, welding the chamfer part 16 of the semi-finished magnet yoke module 19 of the first section;
s43, after the welding of the chamfering part 16 is finished, preheating a nut of the hinged bolt 20 before welding, then welding two symmetrical surfaces of the nut of the hinged bolt 20 to prevent the nut from loosening, and performing PT inspection on a welding position of the nut after welding;
s44, performing PT flaw detection on the welding seams of the plurality of hinged bolts and the first section of semi-finished magnet yoke module;
and S45, performing appearance treatment on the nine-section semi-finished magnet yoke module 19.
And S5, marking a central line and various processing lines on the multi-section semi-finished magnet yoke module 19 in the step S4.
S51, marking out a magnetic pole center line 28 in the height direction and a processing line of a ventilating blade on the nine-section semi-finished magnetic yoke module 19 according to the processing allowance uniformity of the upper plane and the lower plane of the semi-finished magnetic yoke module 19;
and S52, marking out a T-shaped groove processing line and an inner and outer circle processing line according to the uniformity of the allowance of each part of the semi-finished magnet yoke module 19.
S6, roughly turning the multi-section semi-finished magnet yoke module 19 to form a T-shaped groove 7, a balancing weight block mounting hole 11, an excitation lead clamp mounting hole 2, a magnet yoke floating stop plate mounting hole 15 and a magnetic pole key pressing plate mounting hole 26.
And S61, roughly turning the inner circle and the outer circle of the magnet yoke module 19 in a single-side allowance remaining mode according to the processing line of the T-shaped groove 7 and the processing line of the inner circle and the outer circle, wherein two end faces of each section of semi-finished magnet yoke module 19 meet the requirement of a design drawing of a magnet yoke. Each point at the corner of the processing line of the T-shaped groove 7 is punched on the excircle of each section of the semi-finished magnet yoke module 19, and 9 sections are formed; and all screw hole locations are punched on the plane of the semi-finished yoke module 19 of each section. When the semi-finished magnet yoke module 19 of the first section is processed, the magnetic pole falling block 5 is used for correcting, the height difference of the magnetic pole falling block 5 is measured, and if the semi-finished magnet yoke module 19 of the first section is out of tolerance, the semi-finished magnet yoke module 19 of the first section is polished to be in the tolerance range of the design drawing of the magnet yoke; the semi-finished magnet yoke modules 19 of each section complete the following drilling contents, and the turn-over times of the semi-finished magnet yoke modules 19 of each section are reduced;
s62, drilling a balancing weight block mounting hole 11 on the first section of semi-finished magnet yoke module 19 and the ninth section of semi-finished magnet yoke module 19, and drilling an excitation lead clamp mounting hole 2 on the ninth section of semi-finished magnet yoke module 19;
s63, drilling and tapping a magnetic yoke floating stopping plate mounting hole 15 on the semi-finished magnetic yoke module 19 at the eighth section, as shown in the figures 3 and 4;
and S64, drilling and tapping the magnetic pole key pressing plate mounting holes 26 in the nine-section semi-finished magnetic yoke module 19, as shown in figures 1 and 2.
And S7, tapping threads 26 on the balancing weight block mounting hole 11, the drilled excitation lead clamp mounting hole 2, the magnetic yoke floating stop plate mounting hole 15 and the magnetic pole key pressing plate hole, mounting the brake ring plate on the brake ring plate mounting hole of the first section of the semi-finished magnetic yoke module 19, and finally marking a T-shaped groove processing line.
S71, tapping on hole positions drilled by the rechecking vertical lathe (including a balancing weight block mounting hole 11, an excitation lead clamp mounting hole 2, a magnetic yoke floating-stop plate mounting hole 15 and a magnetic pole key pressing plate mounting hole 26), wherein the balancing weight block mounting hole 11, the excitation lead clamp mounting hole 2, the magnetic yoke floating-stop plate mounting hole 15 and the magnetic pole key pressing plate mounting hole 26 are tapped;
s72, turning a brake ring plate mounting surface 27 on the semi-finished magnet yoke module 19 at the first section, pre-assembling the semi-finished magnet yoke module 19 at the first section and a brake ring plate, drilling and tapping a brake ring plate mounting hole 8 on the brake ring plate mounting surface 27, and making matching marks on the semi-finished magnet yoke module 19 at the first section and the brake ring plate;
s73, drilling a balancing weight block mounting hole, drilling an excitation lead clamp mounting hole, a magnetic yoke floating stop plate mounting hole and a magnetic pole key pressing plate hole by a rechecking vertical lathe, and repositioning and scribing a T-groove final processing line on the nine-section semi-finished magnetic yoke module 19, wherein the T-groove final processing line has deviation in the manufacturing process and needs repositioning.
S8, roughly milling the T-shaped groove 7 according to a final machining line and allowance of the T-shaped groove 7, laminating the T-shaped grooves 7 of five sections of semi-finished magnet yoke modules 19 together by using a tooling screw rod, preventing dislocation of the sections when a workpiece is transferred to a station, fastening the five sections of semi-finished magnet yoke modules 19 by using a tensioning screw rod 21 at the position of the T-shaped groove 7 during segmented machining, and preventing machined surfaces of the ventilation blades and the magnetic conduction blocks 6 from being deformed by pulling by using a knocking wrench; after the tightening screw 21 is fastened, the inter-pole ventilation groove between each section of the semi-finished magnet yoke module 19 is fixed by welding through a butt strap.
S9, performing finish turning on the inner circle and the outer circle of the five-section semi-finished magnet yoke module 19 and milling a magnet yoke key groove 13; for the yoke modules 19 with high height, heavy weight and large number of segments, the yoke modules cannot be integrally processed once due to the limitation of processing conditions of a machine tool and the like, the finish machining needs to be completed for several times, several segments of the semi-finished yoke modules 19 need to be processed firstly, and after the finish machining is completed, the rest segments of the semi-finished yoke modules 19 are processed by taking the finished yoke module 19 as a reference, and the number of the segment processing is reduced as much as possible. And each keyway is processed with the shaping sword of customization, control section and the dislocation between the section, guarantee the tightness of yoke key and magnetic pole key.
S91, finely turning the inner circle and the outer circle of each section of the semi-finished magnet yoke module 19, and punching each point at a corner according to a final processing line of the T-shaped groove 7 (the processing line before and after rough processing may have deviation and needs to be re-planned);
and S92, milling a magnetic yoke key groove 13 on the five-section semi-finished magnetic yoke module 19 by adopting numerical control indexing.
S10, according to the positions of the magnetic yoke key grooves 13, finely milling T-shaped grooves 7, and tapping centripetal screw holes and parallel screw holes in the five sections of the semi-finished magnetic yoke modules 19 to obtain five sections of the finished magnetic yoke modules 19, splitting the five sections of the finished magnetic yoke modules 19, and taking one section of the finished magnetic yoke modules 19 out of the five sections of the finished magnetic yoke modules 19 to be assembled with the remaining four sections of the semi-finished magnetic yoke modules 19.
S101, placing the five sections of semi-finished magnet yoke modules 19 on a turntable for leveling and rounding;
s102, setting starting points by taking the yoke key grooves 13 of the five-section semi-finished yoke module 19 as a reference;
s103, milling a T-shaped groove 7 in the excircle of the five-section semi-finished magnet yoke module 19;
s104, drilling a centripetal screw hole and a parallel screw hole in the outer circle of the five-section semi-finished magnet yoke module 19; the centripetal screw hole is formed by pointing the center line of the screw hole to the circle center, the parallel screw hole is formed by parallel the center line of the screw hole and the centripetal line, and the centripetal screw hole and the parallel screw holes are uniformly distributed on the excircle of the magnetic yoke;
s105, tapping the centripetal screw holes and the parallel screw holes in the step S104, wherein water-based tapping liquid is used for tapping or the gaps between the plates are adhered by adhesive tape paper so as to prevent oil from permeating the gaps between the plates and prevent the oil from being dried easily;
s106, detaching one section of the yoke module 19 from the five sections of the finished yoke modules 19, and combining the section of the finished yoke module 19 and the remaining four sections of the semi-finished yoke modules 19 into a whole through a tooling screw rod; the machining allowance of the remaining four sections of the semi-finished yoke module 19 is checked with the removed finished yoke module 19 as a reference.
And S11, loosening the tool screw, considering that the allowance of each part is uniform, taking the yoke key groove 13 of the finished yoke module 19 detached in the step S106 as a reference, tightening the tool screw, rechecking the allowance of each part, and finely turning the inner circle and the outer circle and milling the yoke key groove 13 on the remaining four sections of semi-finished yoke modules 19.
And S12, correcting the rest semi-finished magnet yoke modules 19 by using the section of finished magnet yoke modules 19, tapping and drilling centripetal screw holes and parallel screw holes on the rest semi-finished magnet yoke modules 19, and finely milling the T-shaped groove 7 to obtain the rest finished magnet yoke modules 19.
S121, hanging the finished magnet yoke module 19 of one section and the magnet yoke modules 19 of the remaining four sections on a turntable, correcting by taking the finished magnet yoke module 19 of one section detached in the step S106 as a reference, and milling T-shaped grooves 7 on the semi-finished magnet yoke modules 19 of the remaining four sections;
s122, drilling a centripetal screw hole and parallel screw holes in the semi-finished magnet yoke modules 19 of the remaining four sections, wherein the magnet yoke steel plate 1910 cannot deform in the machining process;
and S123, before the semi-finished product magnetic yoke module 19 mills the corresponding T-shaped groove 7, the corresponding tool screw is detached, and after the T-shaped groove 7 is completed, the tool screw is installed back, so that the machining standard is not changed when the workpiece is at the transfer station. And after all the T-shaped grooves 7 are milled in the rest four sections of the finished magnet yoke modules 19, all the tool screws are completely removed for the next unit to use.
And S13, cleaning and drying the finished magnet yoke modules 19 of each section.
S131, grinding and removing the lapping plates among the sections in the step S8, and cleaning all burrs and sundries in gaps of the finished magnet yoke modules 19 of the sections;
s132, cleaning oil stains on the finished magnet yoke modules 19 of each section; stacking at proper height, and heating for drying.
S14, according to the design drawing of the magnet yoke, the magnet yoke is preassembled, data are measured on the magnet yoke, and the magnet yoke is disassembled and recorded after the data meet the requirements.
S141, hoisting the rotor support into the platform, and compacting and fixing the rotor support at each position; arranging a proper number of adjustable wedge plates and jacks at proper positions of the outer diameter of the magnetic yoke;
s142, adjusting the level of the rotor support, and monitoring the change of the levelness at any time in the subsequent process;
s143, cleaning each part of the magnetic yoke, and coating anti-biting agent such as molybdenum disulfide and the like on the combined surface among the parts;
s144, slightly inserting a driving key into the two sides of the T-shaped key of the magnet yoke key to be matched in the circumferential direction, and hanging the finished magnet yoke module 19 in the first section after confirming that no gap exists; when the finished magnet yoke module 19 is hung, the level of the finished magnet yoke module 19 at the first section is adjusted, and then the finished magnet yoke module is slowly put in and repeatedly adjusted to avoid biting; after the product is qualified, the key is pressed tightly, and the adjustable wedge plate and the jack can be adjusted at each position to realize compaction;
s145, sequentially hoisting the remaining eight sections of finished magnet yoke modules 19, adjusting the gap difference between the inner diameter of each finished magnet yoke module 19 and the rotor support in place, jacking each pressed key before adjustment, stacking the next section of finished magnet yoke module 19 after adjusting one section of finished magnet yoke module 19, and re-measuring the gap between each section of finished magnet yoke module 19 and the rotor support during stacking;
s146, measuring the dislocation of the T-shaped groove 7;
s147, pre-mounting the magnetic yoke floating-stopping plate 18, the adjusting pad and the fixing bolt 23 on the magnetic yoke floating-stopping plate mounting hole 15 of the magnetic yoke according to a design drawing of the magnetic yoke, and adjusting the gap between the magnetic yoke floating-stopping plate 18 and the upper surface of the stud groove 25 of the rotor central body;
s148, measuring the concentricity of the finished magnet yoke module 19 and the rotor bracket in a piano wire hanging mode;
s149, assembling the coil support to the coil support holes 1 of the magnetic yoke according to the distribution of the design drawing of the magnetic yoke, wherein all parts are required to be preassembled; the excitation lead and the coil are assembled to an excitation lead clamp mounting hole 2 and a coil inter-electrode connecting hole 14 of the magnetic yoke according to a design drawing of the magnetic yoke, and the concentricity and the perpendicularity of the detection coil supporting hole 1, the excitation lead clamp mounting hole 2 and the coil inter-electrode connecting hole 14 are detected; after the coil support is detected to be qualified, disassembling the coil support and assembling the coil support, wherein the coil support is required to be preassembled;
s1410, measuring and recording the flatness of the brake ring plate and the size of the magnetic pole landing block 5;
s1411, making corresponding position marks among the finished magnet yoke modules 19 of each section, and making two marks in the cross direction;
and S1412, removing all parts of the magnetic yoke.
S15, coating red enamel on each processing surface of the magnetic yoke.
The above detailed description is a preferred embodiment of the present invention, and is not intended to limit the present invention, and any other modifications or equivalent substitutions that do not depart from the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The method for manufacturing the annular thick plate magnetic yoke is characterized by comprising the following steps of:
s1, cutting a steel plate into a plurality of semi-finished yoke steel plates according to a design drawing of a yoke, and chamfering the semi-finished yoke steel plates to obtain a plurality of finished yoke steel plates;
s2, measuring the unevenness and the thickness of the plurality of magnetic yoke steel plates in the step S1, and welding a plurality of magnetic pole falling blocks and a plurality of ventilation blades to the plurality of magnetic yoke steel plates;
s3, stacking the plurality of magnetic yoke steel plates obtained in the step S2 through tensioning screws to obtain a plurality of sections of semi-finished magnetic yoke modules;
s4, mounting a plurality of hinged bolts on the first section of the semi-finished magnetic yoke module;
s5, marking a magnetic pole center line and various processing lines on the multi-section semi-finished magnet yoke module in the step S4;
s6, roughly turning T-shaped grooves, balancing weight block mounting holes, drilling excitation lead clamp mounting holes, magnetic yoke floating stop plate mounting holes and magnetic pole key pressing plate holes on the plurality of sections of semi-finished magnetic yoke modules according to the plurality of processing lines;
s7, tapping threads on the balance weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating stop plate mounting hole and the magnetic pole key press plate hole, mounting a brake ring plate on the first section of the semi-finished magnetic yoke module, and scribing a T-shaped groove final processing line on the sections of the semi-finished magnetic yoke module;
s8, roughly milling T-shaped grooves on the multiple sections of the semi-finished magnet yoke modules according to the T-shaped groove final processing line, and then laminating part of the semi-finished magnet yoke modules through tool screws;
s9, performing finish turning on the inner circle and the outer circle of part of the semi-finished magnet yoke module and milling a magnet yoke key groove;
s10, according to the positions of the magnetic yoke key grooves, finely milling T grooves, tapping centripetal screw holes and parallel screw holes in part of the semi-finished magnetic yoke modules to obtain part of finished magnetic yoke modules, splitting the part of finished magnetic yoke modules, and taking out a section of finished magnetic yoke modules from the part of finished magnetic yoke modules to assemble with the rest of the semi-finished magnetic yoke modules;
s11, correcting the rest semi-finished magnet yoke modules by taking the finished magnet yoke module at one section as a reference, and finely turning the rest semi-finished magnet yoke modules into inner and outer circles and milling a magnet yoke key groove;
s12, correcting the rest semi-finished magnet yoke module by using the finished magnet yoke module of one section, drilling the centripetal screw holes and the parallel screw holes on the rest semi-finished magnet yoke module, and finely milling T-shaped grooves to obtain the rest finished magnet yoke module;
s13, cleaning and drying the multiple sections of finished magnet yoke modules;
s14, pre-assembling the magnet yoke according to the design drawing of the magnet yoke, measuring data of the magnet yoke, and disassembling and recording the magnet yoke when the data meet the requirements;
s15, painting the magnet yoke in the step S14;
the step S2 includes the steps of:
s21, carrying out sand blasting and painting on a plurality of magnetic yoke steel plates, and then leveling the plurality of magnetic yoke steel plates by using an oil press;
s22, measuring and marking the thicknesses of the plurality of magnetic yoke steel plates, and uniformly matching the magnetic yoke steel plates according to the thickness deviation values of the plurality of magnetic yoke steel plates;
s23, placing a plurality of magnetic yoke steel plates on a platform, and welding the magnetic pole falling prevention blocks and the magnetic yoke steel plates according to a design drawing of a magnetic yoke to obtain the magnetic yoke steel plates with the magnetic pole falling prevention blocks;
s24, tightening the magnetic conduction block of the magnetic yoke steel plate in the step S23 and the ventilation blade through a process bolt, and then welding;
and S25, carrying out MT flaw detection on the welding seam of the magnetic pole landing block according to the design drawing of the magnetic yoke.
2. A method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S3 includes the steps of:
s31, drilling tensioning screw mounting holes on the plurality of magnetic yoke steel plates, and measuring the thickness of the plurality of magnetic yoke steel plates;
s32, after the thicknesses of the plurality of magnetic yoke steel plates are measured, matching and stacking are carried out according to the thicknesses of the plurality of magnetic yoke steel plates, and a multi-section semi-finished magnetic yoke module is obtained;
s33, mounting tension screws on the plurality of sections of semi-finished magnet yoke modules in the step S32;
s34, after all the tightening screws are fastened, preheating nuts of the tightening screws, and welding the nuts with the multiple sections of the semi-finished magnet yoke modules;
s35, marking and positioning the multiple sections of the semi-finished magnet yoke modules, and then drilling and reaming bolt mounting holes on the multiple sections of the semi-finished magnet yoke modules;
and S36, performing PT flaw detection on the nut in the step S34.
3. A method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S4 includes the steps of:
s41, pre-installing a plurality of hinged bolts in hinged bolt installation holes of the first section of the semi-finished magnetic yoke module, then tensioning the hinged bolts and recording the elongation of the hinged bolts;
s42, after the hinged bolt is tightened, welding the two chamfered parts of the semi-finished magnet yoke module of the first section;
s43, after the chamfer part is welded, welding the hinged bolt and the first section of the semi-finished magnetic yoke module;
s44, carrying out PT flaw detection on the hinged bolt and the welding seam of the multi-section semi-finished magnet yoke module;
and S45, performing appearance treatment on the multiple sections of the semi-finished magnet yoke modules.
4. The method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S6 includes the steps of:
s61, roughly turning inner and outer circles on the multiple sections of the semi-finished magnet yoke modules according to the multiple processing lines, and punching corner points of the T-shaped groove on the multiple sections of the semi-finished magnet yoke modules;
s62, drilling the balancing weight block mounting holes on the head section and the tail section of the semi-finished magnet yoke module, and drilling the excitation lead clamp mounting holes on the tail section of the semi-finished magnet yoke module;
s63, drilling and tapping a magnetic yoke floating stop plate mounting hole on the magnetic yoke module of the penultimate section;
and S64, drilling and tapping the magnetic pole key pressing plate mounting holes in the multiple sections of the semi-finished magnetic yoke modules.
5. The method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S7 includes the steps of:
s71, rechecking the balancing weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating-stop plate mounting hole and the magnetic pole key pressing plate hole, and drilling and tapping the balancing weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating-stop plate mounting hole and the magnetic pole key pressing plate hole;
s72, turning a brake ring plate mounting surface on the semi-finished magnet yoke module at the first section, pre-mounting the brake ring plate on the brake ring plate mounting surface, drilling a brake ring plate mounting hole on the brake ring plate mounting surface, and marking a pairing mark on the brake ring plate mounting surface and the brake ring plate;
and S73, rechecking the balancing weight block mounting hole, the drilled excitation lead clamp mounting hole, the magnetic yoke floating stop plate mounting hole and the magnetic pole key pressing plate hole, and repositioning the T-shaped groove final processing line on the multi-section semi-finished magnetic yoke module.
6. The method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S10 includes the steps of:
s101, placing part of the semi-finished magnetic yoke module on a turntable for leveling and rounding;
s102, setting a starting point by taking the magnetic yoke key groove as a reference;
s103, finely milling the T-shaped groove in part of the semi-finished magnet yoke module;
s104, milling the centripetal screw holes and the parallel screw holes in part of the semi-finished magnet yoke modules;
s105, tapping the centripetal screw hole and the parallel screw holes to obtain a partial finished magnet yoke module;
s106, splitting part of the finished magnet yoke modules, and assembling a section of the finished magnet yoke module and the rest of the semi-finished magnet yoke modules from the part of the finished magnet yoke modules through a tooling screw rod.
7. A method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S12 includes the steps of:
s121, hanging a section of finished magnet yoke module and the rest of semi-finished magnet yoke modules to a turntable, correcting by taking the magnet yoke modules as a reference, and milling T-shaped grooves in the rest of semi-finished magnet yoke modules;
s122, drilling a centripetal screw hole and a parallel screw hole in the rest semi-finished magnet yoke modules;
and S123, finely milling a T-shaped groove in the residual semi-finished magnet yoke module and removing the tool screw to obtain the residual finished magnet yoke module.
8. The method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S14 includes the steps of:
s141, hoisting the rotor support into a platform, and fixing the rotor support;
s142, adjusting the rotor support to be horizontal;
s143, cleaning each part of the magnetic yoke;
s144, inserting a driving key into the T-shaped key, hoisting the finished magnet yoke module of the first section into the platform, adjusting the level, and driving the driving key tightly after the finished magnet yoke module of the first section is qualified in level;
s145, hanging the rest finished magnet yoke modules into the platform one by one and installing to obtain a semi-finished magnet yoke;
s146, measuring the dislocation of the T-shaped groove;
s147, pre-installing a magnetic yoke floating stop plate, an adjusting pad and a fixing bolt on the magnetic yoke according to a design drawing of the magnetic yoke, and adjusting a gap between the magnetic yoke floating stop plate and a rotor central body;
s148, measuring concentricity of the finished magnet yoke module and the rotor support;
s149, according to the design drawing of the magnetic yoke, uniformly installing the coil and the excitation lead wire in the magnetic yoke, checking the concentricity and the verticality of a detection coil supporting hole, an excitation lead wire clamp installing hole and an inter-coil connecting hole of the magnetic yoke, and dismantling the coil and the excitation lead wire after the detection is qualified;
s1410, measuring and recording the flatness of the brake ring plate and the size of the magnetic pole falling block;
s1411, marking the multiple sections of finished magnet yoke modules;
and S1412, splitting the magnetic yoke.
9. The method for manufacturing an annular thick plate yoke according to claim 1, wherein the step S5 includes the steps of:
s51, marking out a center line in the height direction and a processing line of the ventilating vanes on the plurality of sections of semi-finished magnet yoke modules according to the processing allowance of the ventilating vanes;
and S52, scribing T-shaped groove processing lines and inner and outer circle processing lines on the plurality of sections of semi-finished magnet yoke modules.
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