CN203184727U - Scale division machining device of large-scale nuclear power rotor - Google Patents
Scale division machining device of large-scale nuclear power rotor Download PDFInfo
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- CN203184727U CN203184727U CN 201320122093 CN201320122093U CN203184727U CN 203184727 U CN203184727 U CN 203184727U CN 201320122093 CN201320122093 CN 201320122093 CN 201320122093 U CN201320122093 U CN 201320122093U CN 203184727 U CN203184727 U CN 203184727U
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- power rotor
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Abstract
The utility model discloses a scale division machining device of a large-scale nuclear power rotor. The device comprises a bed body, a front support device and a rear support device which are arranged on the bed body, a scale division device, at least one circular grating for detecting the rotating angle of a workpiece, guide tracks arranged on at least one side of the bed body, numerically-controlled machine beds slidably on the respective guide tracks and a PLC (Programmable Logic Controller). According to the device, the static pressure support in the front support device and the rear support device is realized; and the circular grating is used for detecting and controlling the precision of the workpiece in a scale division process, so that the accuracy and the stability of scale division positioning are improved. Thus, the stability and the precision of product machining are ensured; and the percent of pass is increased substantially.
Description
Technical field
The utility model relates to a kind of calibration processing unit (plant) for the large nuclear-power rotor.
Background technology
The nuclear power rotor is as the vitals in the generating set, have large scale, high accuracy, costly characteristics, the nuclear power rotor has been adorned the weight of blade will be above 300 tons, its rotor blank is worth and reaches 8,000 ten thousand RMB, the groove of nuclear power rotor insert blade is fir-tree type circular arc race, this race can not produce stress and concentrate, and the assembling of blade is also very convenient; But these race requirement on machining accuracy height, quantity is many, difficulty of processing is big; Current processing for the nuclear power rotor groove, all adopt two ends of rotor to support by sliding bearing, the mode of Digit Control Machine Tool calibration processing, because the frictional force of sliding support is very big, the driving moment of nuclear power rotor when calibration changes greatly, creeping phenomenon can appear in the calibration process, cause the calibration location inaccurate, cause machining accuracy to descend greatly, simultaneously, it is longer that the nuclear power rotor has length, the characteristics that weight is big, STRESS VARIATION is arranged during calibration, cause the calibration of two ends of rotor not necessarily to carry out synchronously, and present processing unit (plant) is all uncontrollable to the synchronism of two ends of rotor calibration, this also can cause the calibration location inaccurate, its final result will cause the processing of nuclear power rotor defective, form serious scrapping.
Summary of the invention
The purpose of this utility model is at the prior art above shortcomings, a kind of calibration processing unit (plant) of large nuclear-power rotor is provided, it can improve accuracy and the stability of calibration location, has guaranteed stability and the precision of product processing, has significantly improved qualification rate.
For achieving the above object, the calibration processing unit (plant) of a kind of large nuclear-power rotor of the present utility model, comprise lathe bed, be located on the lathe bed before, rear support device, indexing means, at least one detects the round grating of workpiece rotational angle, be located at the guide rail of at least one side of lathe bed, the CNC milling machine on the guide rail separately is located in slip, PLC, before it is characterized in that, rear support device includes the base for supporting of being located on the lathe bed, be fixed in hydrostatic bearing pad and support on the base for supporting, hydrostatic bearing pad is equipped with cancave cambered surface, and the groove more than cancave cambered surface is provided with together, groove arranges in cancave cambered surface bottom bus bilateral symmetry, before, the identical setting of groove in the back hydrostatic bearing pad, in hydrostatic bearing pad, be provided with the oil circuit that links to each other with the per pass groove, every oil circuit all links to each other with a distributor by pipeline, distributor links to each other with oil pump, be equipped with pressure regulator and choke valve at every pipeline, be installed with the chucking oil cylinder at each support, the piston rod of chucking oil cylinder connects firmly with the chucking body, and the chucking body is positioned at hydrostatic bearing pad top separately; Indexing means comprises the casing be located on the lathe bed, servomotor, is located at worm screw and calibration main shaft on the casing by bearing, worm screw one end links to each other with servomotor with reductor by shaft coupling, be installed with the worm gear with worm engaging on the calibration main shaft, calibration main shaft and a chucks connect firmly, and chucks is provided with more than three movably claw; Servomotor, circle grating all link to each other with PLC.
Above-mentioned round grating can be located on the rear end and the bearing adjacent with rear support device of workpiece;
The above-mentioned grating of also can justifying is located on the front end and casing of calibration main shaft;
Workpiece is carried out calibration add man-hour, chucks is with the end chucking of workpiece; By oil pump and distributor the groove in the hydrostatic bearing pad is fed hydraulic oil, groove arranges in cancave cambered surface bottom bus bilateral symmetry, add that pressure regulator and choke valve can guarantee that the fluid in the per pass groove acts on the equal and symmetrical distribution of pressure of axle journal, below the axle journal of two ends, form the static pressure oil film, before, the identical setting of groove in the back hydrostatic bearing pad, make workpiece by the synchronous vertical jacking that makes progress, floating the 0.02-0.04 millimeter gets final product, this moment, axle journal separated with the cancave cambered surface of hydrostatic bearing pad, pass through servomotor again, reductor, shaft coupling, worm screw, worm gear, the calibration main shaft, when chucks drive workpiece rotates to the angle of presetting, the static pressure oil film is minimum to the frictional force of workpiece, drive the moment uniformity of workpiece, in the calibration process creeping phenomenon can not appear, the calibration accurate positioning, and machining accuracy improves greatly; PLC and circle grating can accurately detect and control calibration; Need after calibration puts in place workpiece is added man-hour, to the release simultaneously of the fluid in the groove, workpiece descends, and the piston rod of operation sheet locking oil cylinder is descending, and general who has surrendered's axle journal is fixed under the drive chucking body, and CNC milling machine is processed workpiece again;
As further improvement of the utility model, the front end of described calibration main shaft also connects firmly a chucking dish, also is provided with two locking cylinders in casing, and the piston rod of two locking cylinders lays respectively at the both sides of chucking dish; After calibration put in place, the piston rod of two locking cylinders stretched out, with fixing chucking dish, prevented that workpiece from rotating, and further calibration positioned, and can improve machining accuracy;
As further improvement of the utility model, on the front end of chucking dish and casing, also be provided with round grating; For the workpiece that length is long, weight is big, can the synchronism of workpiece two ends calibration be detected by forward and backward two circle gratings, avoid the two ends calibration that causes because of clamping, stress, temperature etc. poor, thereby improve the machining accuracy of such workpiece;
As further improvement of the utility model, in the chucking body, be provided with pilot hole, be provided with the guide finger that cooperates with pilot hole at support; Also be provided with upper and lower two near switch on support, upper and lower digital control system near switch and Digit Control Machine Tool all links to each other with PLC; Guide finger can guarantee that tightening body moves as straight line; Upper and lowerly can judge the situation that contacts of chucking body and workpiece near switch, calibration adds man-hour, can realize the automatic control that calibration is processed by PLC;
As further improvement of the utility model, be equipped with guide rail in the lathe bed both sides, two CNC milling machines are arranged in the bilateral symmetry of workpiece; Two CNC milling machines have not only improved working (machining) efficiency, and more crucial is because symmetry processing, and the vibrations in the time of can reducing the big load cutting of lathe have further improved crudy;
In sum, the utility model can improve accuracy and the stability of calibration location, has guaranteed stability and the precision of product processing, has significantly improved qualification rate.
Description of drawings
Fig. 1 is the stereogram of the utility model embodiment.
Fig. 2 is the front view of back and front supporting device among Fig. 1.
Fig. 3 is the front view of hydrostatic bearing pad among Fig. 2.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the hydraulic schematic diagram of back and front supporting device.
Fig. 6 is the front view of indexing means among Fig. 1.
Fig. 7 is the A-A cutaway view of Fig. 6.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Extremely shown in Figure 7 as Fig. 1, the calibration processing unit (plant) of this large nuclear-power rotor, comprise lathe bed 1, be located on the lathe bed 1 before, rear support device 2, indexing means 3, two round gratings 4 and 5 that detect the workpiece rotational angle, be located at the guide rail 6 of lathe bed both sides, the CNC milling machine 7 on the guide rail 6 separately is located in slip, PLC(is not shown), before, rear support device 2 includes the base for supporting of being located on the lathe bed 18, be fixed in hydrostatic bearing pad 9 and support 10 on the base for supporting 8, hydrostatic bearing pad 9 is equipped with cancave cambered surface, and be provided with four road grooves 11 at cancave cambered surface, groove 11 arranges in cancave cambered surface bottom bus bilateral symmetry, before, groove 11 identical settings in the back hydrostatic bearing pad 9, in hydrostatic bearing pad 9, be provided with the oil circuit 12 that links to each other with the per pass groove, every oil circuit 12 all links to each other with a distributor 14 by pipeline 13, distributor 14 links to each other with oil pump 15, be equipped with pressure regulator 16 and choke valve 18 at every pipeline 13, be installed with chucking oil cylinder 19 at each support 10, the piston rod of chucking oil cylinder 19 connects firmly with chucking body 20, chucking body 20 is positioned at hydrostatic bearing pad 9 tops separately, in chucking body 20, be provided with pilot hole, be provided with the guide finger 21 that cooperates with pilot hole at support 10; On support 10, also be provided with upper and lower near switch 22,23, on chucking body 20, also be furnished with copper coin 24, pull the axle journal of nuclear power rotor when preventing from tightening, the axle journal at nuclear power rotor 25 two ends places on the cancave cambered surface of two hydrostatic bearing pads 9, circle grating 4 is located on the rear end and the bearing 26 adjacent with rear support device 2 of nuclear power rotor 25, and two CNC milling machines 7 are arranged in nuclear power rotor 25 bilateral symmetry; Indexing means 3 comprises the casing of being located on the lathe bed 1 27, servomotor 28, be located at worm screw 29 and calibration main shaft 31 on the casing 27 by bearing, worm screw 29 1 ends link to each other with servomotor 28 with reductor 33 by shaft coupling 32, be installed with the worm gear 30 with worm screw 29 engagements on the calibration main shaft 31, calibration main shaft 31 and a chucks 34 connect firmly, chucks 34 is provided with four movably claws 35, the front end of described calibration main shaft 31 also connects firmly a chucking dish 36, in casing 27, also be provided with two locking cylinders 38, the piston rod of two locking cylinders 38 lays respectively at the both sides of chucking dish 36, and circle grating 5 is located on the front end and casing 27 of chucking dish 36; Servomotor 28, two circle gratings 4 and 5, upper and lowerly all link to each other with PLC with the digital control system of two CNC milling machines 7 near switch 22,23.
Operation principle of the present utility model is: the axle journal at nuclear power rotor 25 two ends is placed in the cancave cambered surface of back and front supporting device two hydrostatic bearing pads 9, and chucks 34 is by the front end chucking of four claws 35 on it with nuclear power rotor 25; Judge by PLC and circle grating 5 whether nuclear power rotor 25 is in the preset reference point of calibration, as denying, by oil pump 15, before 14 pairs in the distributor, back hydrostatic bearing pad 9 inner groovies 11 feed hydraulic oil, below the axle journal of two ends, form the static pressure oil film, groove 11 arranges in cancave cambered surface bottom bus bilateral symmetry, add that pressure regulator 16 and choke valve 18 can guarantee that the fluid in the per pass groove 11 acts on the equal and symmetrical distribution of pressure of axle journal, preceding, the identical setting of groove in the back hydrostatic bearing pad 9, make nuclear power rotor 25 by the synchronous vertical jacking that makes progress, nuclear power rotor 25 floats the 0.02-0.04 millimeter, axle journal separates with cancave cambered surface, the PLC several seconds control servomotor 28 of delaying time again turns an angle, servomotor 28 passes through by reductor 33, shaft coupling 32, worm screw 29, the transmission mechanism that worm gear 30 constitutes, calibration main shaft 31 and chucks 34 make nuclear power rotor 25 rotate and get back to reference point, simultaneously with two circle gratings 4,5 detected value zero clearing, and a zero clearing is once in the processing of same nuclear power rotor 25; Be in the reference point of calibration when nuclear power rotor 25, the time-delay several seconds is to the hydraulic oil release simultaneously of hydrostatic bearing pad 9 inner groovies 11, nuclear power rotor 25 descends, restart the chucking oil cylinder 19 on the back and front supporting device 2, the piston rod drive chucking body 20 of chucking oil cylinder 19 descends and puts in place, with nuclear power rotor 25 chuckings, simultaneously two locking cylinders 38 is fed hydraulic oil and also keeps, clamp chucking dish 36 by its piston rod, further calibration is positioned; PLC by on the back and front supporting device 2 following near switch 23 detect chucking body 20 descend put in place after, PLC several seconds of delaying time again starts two CNC milling machines 7 and simultaneously nuclear power rotor 25 is processed, PLC is made as interlocking with the driving of servomotor 28 and CNC milling machine 7, prevent maloperation, guarantee the security of processing; After a processing stroke is finished, PLC sends instruction, two CNC milling machines 7 stop processing and withdrawing, the piston rod of operation sheet locking oil cylinder 19 rises, detect following on the back and front supporting device 2 near switch 23 as PLC, show that chucking body 20 still tightens the axle journal of nuclear power rotor 25 this moment, it is up that operation sheet locking oil cylinder 19 makes that piston rod continues, and chucking body 20 unclamps axle journal; Detecting as PLC must near switch 22, show that then chucking body 20 unclamps axle journal at this moment, static pressure oil film by two ends is with the nuclear power rotor 25 synchronous vertical jacking that makes progress again, again to 38 releases of two locking cylinders, can prevent that nuclear power rotor 25 rotates in the jacking process, further improve the accuracy of calibration; The PLC several seconds control servomotor 28 of delaying time again turns an angle, servomotor 28 passes through transmission mechanism, calibration main shaft 31 and chucks 34 make nuclear power rotor 25 rotate default sub-degree angle, after rotateing in place, PLC is two circle gratings 4 relatively, 5 detected nuclear power rotor 25 two ends rotational angles, when the two differential seat angle skids because of claw 35, when accidentalia such as variations in temperature surpass preset value (as 5/1000ths degree), PLC sends alarm signal, the initial position of again nuclear power rotor 25 backward rotation being got back to before this calibration is adjusted, and surpasses preset value up to differential seat angle; Do not surpass preset value as differential seat angle, after rotateing in place, the time-delay several seconds is to the hydraulic oil release simultaneously of hydrostatic bearing pad 9 inner groovies 11, nuclear power rotor 25 descends, piston rod by chucking oil cylinder 19 drives 20 declines of chucking body, with nuclear power rotor 25 chuckings, simultaneously two locking cylinders 38 are fed hydraulic oil and maintenance, clamp chucking dish 36 by its piston rod, PLC detect down near switch 23 electric after, PLC several seconds of delaying time again starts two CNC milling machines 7 and simultaneously nuclear power rotor 25 is processed, and finishes a processing stroke; Constantly repeat the calibration manufacturing procedure, can finish the processing to whole nuclear power rotor 25 races;
Adopt above-mentioned processing method, the static pressure oil film is minimum to the frictional force of nuclear power rotor 25, drives the moment uniformity of workpiece, in the calibration process creeping phenomenon can not appear, the calibration accurate positioning has guaranteed stability and precision that product is processed, has significantly improved qualification rate; Bilateral symmetry arranges that CNC milling machine 7 has not only improved working (machining) efficiency, and more crucial is because symmetry processing, and the vibrations in the time of can reducing the big load cutting of lathe have further improved crudy.
The utility model is not limited to above-mentioned embodiment, and worm and gear also can be replaced by gear pair in the transmission mechanism, and the installation site of circle grating also can be varied, but they all belong to the protection domain of this patent.The art of this patent derives from the great special problem of country: the axial race of superduty nuclear power rotor dedicated numerical control mills project number: 2011ZX04002-081.
Claims (7)
1. the calibration processing unit (plant) of a large nuclear-power rotor, comprise lathe bed, be located on the lathe bed before, rear support device, indexing means, at least one detects the round grating of workpiece rotational angle, be located at the guide rail of at least one side of lathe bed, the CNC milling machine on the guide rail separately is located in slip, PLC, before it is characterized in that, rear support device includes the base for supporting of being located on the lathe bed, be fixed in hydrostatic bearing pad and support on the base for supporting, hydrostatic bearing pad is equipped with cancave cambered surface, and the groove more than cancave cambered surface is provided with together, groove arranges in cancave cambered surface bottom bus bilateral symmetry, before, the identical setting of groove in the back hydrostatic bearing pad, in hydrostatic bearing pad, be provided with the oil circuit that links to each other with the per pass groove, every oil circuit all links to each other with a distributor by pipeline, distributor links to each other with oil pump, be equipped with pressure regulator and choke valve at every pipeline, be installed with the chucking oil cylinder at each support, the piston rod of chucking oil cylinder connects firmly with the chucking body, and the chucking body is positioned at hydrostatic bearing pad top separately; Indexing means comprises the casing be located on the lathe bed, servomotor, is located at worm screw and calibration main shaft on the casing by bearing, worm screw one end links to each other with servomotor with reductor by shaft coupling, be installed with the worm gear with worm engaging on the calibration main shaft, calibration main shaft and a chucks connect firmly, and chucks is provided with adjustable claw more than three; Servomotor all links to each other with PLC with the circle grating.
2. the calibration processing unit (plant) of a kind of large nuclear-power rotor as claimed in claim 1 is characterized in that described round grating is located on the rear end and the bearing adjacent with rear support device of workpiece.
3. the calibration processing unit (plant) of a kind of large nuclear-power rotor as claimed in claim 1 is characterized in that described round grating is located on the front end and casing of calibration main shaft.
4. the calibration processing unit (plant) of a kind of large nuclear-power rotor as claimed in claim 1 or 2, the front end that it is characterized in that described calibration main shaft also connects firmly a chucking dish, also be provided with two locking cylinders in casing, the piston rod of two locking cylinders lays respectively at the both sides of chucking dish.
5. the calibration processing unit (plant) of a kind of large nuclear-power rotor as claimed in claim 4 is characterized in that being provided with round grating at front end and the casing of chucking dish.
6. the calibration processing unit (plant) of a kind of large nuclear-power rotor as claimed in claim 5 is characterized in that being provided with pilot hole in the chucking body, is provided with the guide finger that cooperates with pilot hole at support; Also be provided with upper and lower two near switch on support, upper and lower digital control system near switch and CNC milling machine all links to each other with PLC.
7. the calibration processing unit (plant) of a kind of large nuclear-power rotor as claimed in claim 6 is characterized in that being equipped with guide rail in the lathe bed both sides, and two CNC milling machines are arranged in the bilateral symmetry of workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320122093 CN203184727U (en) | 2013-03-18 | 2013-03-18 | Scale division machining device of large-scale nuclear power rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320122093 CN203184727U (en) | 2013-03-18 | 2013-03-18 | Scale division machining device of large-scale nuclear power rotor |
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| Publication Number | Publication Date |
|---|---|
| CN203184727U true CN203184727U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320122093 Expired - Fee Related CN203184727U (en) | 2013-03-18 | 2013-03-18 | Scale division machining device of large-scale nuclear power rotor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143759A (en) * | 2013-03-18 | 2013-06-12 | 四川长征机床集团有限公司 | Indexing processing device and method of large axle-liked workpiece |
| CN105252346A (en) * | 2014-03-12 | 2016-01-20 | 滕天阳 | Built-in machine tool |
| CN108747510A (en) * | 2018-09-11 | 2018-11-06 | 上海电气集团上海电机厂有限公司 | A kind of processing tool of large synchronous motor armature spindle herringbone magnet steel mounting groove |
-
2013
- 2013-03-18 CN CN 201320122093 patent/CN203184727U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143759A (en) * | 2013-03-18 | 2013-06-12 | 四川长征机床集团有限公司 | Indexing processing device and method of large axle-liked workpiece |
| CN105252346A (en) * | 2014-03-12 | 2016-01-20 | 滕天阳 | Built-in machine tool |
| CN105252346B (en) * | 2014-03-12 | 2017-09-29 | 滕天阳 | Built-in lathe |
| CN108747510A (en) * | 2018-09-11 | 2018-11-06 | 上海电气集团上海电机厂有限公司 | A kind of processing tool of large synchronous motor armature spindle herringbone magnet steel mounting groove |
| CN108747510B (en) * | 2018-09-11 | 2024-03-12 | 上海电气集团上海电机厂有限公司 | Machining tool for herringbone magnetic steel mounting groove of rotor shaft of large synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20160318 |