CN100534679C - Boring machine - Google Patents
Boring machine Download PDFInfo
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- CN100534679C CN100534679C CNB2007100505576A CN200710050557A CN100534679C CN 100534679 C CN100534679 C CN 100534679C CN B2007100505576 A CNB2007100505576 A CN B2007100505576A CN 200710050557 A CN200710050557 A CN 200710050557A CN 100534679 C CN100534679 C CN 100534679C
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- boring bar
- main spindle
- boring machine
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Abstract
The invention discloses a boring machine used for processing the coupled wheel coupling hole of a rotor of a steam turbine. The invention comprises a pair of end plates respectively fixed on the back end plate of a left coupled wheel and a right coupled wheel, a main spindle box fixed on a side end plate, a feeding box fixed on the other side end plate, and a boring spindle broken through the coupled wheel coupling hole. The invention is characterized in that the main spindle box adopts a gear reduction unit, the speed of the main spindle and the operating efficiency are improved, and the volume of the main spindle box is reduced; the box body of the main spindle box is made of aluminum or aluminum alloy, the weight is reduced, and the installing and clamping operation is simple and labor-saving; an align tooling is installed, and the align is correct and rapid.
Description
Technical field
The present invention relates to Boring machine, specifically, is a kind of Boring machine that is used for the processing vapor turbine wheel to the wheel connection holes.
Background technology
Middle pressure and low pressure, low pressure and the generator amature of turbine rotor are relatively independent, need when installing at the scene by to wheel, attachment bolt will in lowly, low send out a two-stage rotor and link into an integrated entity, for guaranteeing the positional precision after rotor connects, connection holes to wheel leaves allowance, behind the installation in position, again connection holes is expanded to same size the attachment bolt of packing into, low in inciting somebody to action, low two sections are connected to integral body, and unit can put into operation.Carry out in the erecting bed because of reaming, can not process, must design the Boring machine of a special use with commonsense method.This Boring machine must satisfy following requirement: 1. pair wheel space, place is narrow and small, and the appearance and size of Boring machine should be small and exquisite, and structure must be compact.2. to not having suitable supporting mass, Boring machine can only be installed in around the wheel on the wheel, so clamping device should be arranged.3. the connection holes of wheel is had a plurality ofly, respectively reaming will be through multiple clamping, thus the weight of Boring machine should try one's best gently, easy to use, otherwise operation easier is big.The applicant once successfully designed the Boring machine that satisfies above-mentioned requirements, and obtain the Chinese patent (patent No.: ZL03249259.6), but, also there are some shortcomings in this Boring machine, mainly contains: 1. boring bar adopts the worm and gear auxiliary driving, and gearratio is bigger, the boring bar rotating speed is slower, adopt high-speed steel tool, working (machining) efficiency is low, one of boring about Kong Yaoyi hour; 2. in the main spindle box, the axial dimension that worm couple and bearing occupy is bigger, so the axial dimension of main spindle box is bigger, and casing makes with iron and steel, and weight is still bigger, and the clamping operation is more painstaking; 3. same motor-driven is adopted in motion of main shaft and feed motion, realize feed motion by differential gearing, tool feeding speed is fully by the decision of boring bar rotating speed, and proportional relation, lacks flexibility, can not satisfy some technological requirements, for example, in order to process unlike material, different apertures to wheel, the rotating speed and the amount of feeding that boring is changeed preferably can be regulated separately, also can guarantee higher roughness to adapt to on-the-spot actual processing to wheel; 4. frock design is fairly simple in looking for, adopt during coning sleeve looks for, coning sleeve be that line contact to the wheel bolt hole, the easy skew usually will repeatedly just can be found accurately, complex operation, time-consuming, non-cutting time is long, influences the unit installation progress.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, provide that a kind of working (machining) efficiency is higher, weight is lighter, clamping is easy and simple to handle, look in accurately efficiently turbine rotor to wheel connection holes Boring machine.
The technical solution that realizes above-mentioned purpose is:
A kind of Boring machine that is used for turbine rotor to the wheel connection holes comprises
The end plate of a pair of left and right layout and anchor clamps thereof, two end plates is separately fixed at left and right back of the body end face to wheel by its anchor clamps, and a side end panel is provided with boring bar bearing;
One main spindle box is fixed on the opposite side end plate, and this main spindle box is furnished with main motor, is furnished with main shaft decelerator and boring bar sliding bearing in the casing; Described main motor adopts variable-frequency motor;
One feed box, be fixed on boring bar bearing the same side end plate on, be furnished with the feed gear wheel decelerator in the casing, end plate is provided with boring bar bearing and feeding transmission mechanism;
One boring bar, through in the wheel connection holes, the one end is positioned at main spindle box, is supported on the boring bar sliding bearing in this case, and the other end is supported on the boring bar bearing; Boring cutter is housed on the boring bar;
It is characterized in that:
Described main shaft decelerator adopts gear pair, and its driving gear connects the output shaft of main motor, and its driven gear is connected with the boring bar key, and with the boring bar axial sliding fit, be sliding bearing.
Bearing in the described main spindle box adopts combination bearing, and driven gear is fixed on the main shaft casing by combination bearing, and the driven gear endoporus is connected with the boring bar key, and with the boring bar axial sliding fit, play the sliding bearing effect.
The casing of described main spindle box is made with aluminium or its alloy.
Described feed box is furnished with the feeding motor, and its output shaft connects the feed gear wheel decelerator, and the feed gear wheel decelerator connects the feeding transmission mechanism; Described feeding motor adopts variable-frequency motor.
Described feeding transmission mechanism adopts screw pair, and described leading screw is fixed on the feed gear wheel decelerator, and described nut is connected with boring bar by active connection.
Described active connection is with the bearing of sleeve, the affixed nut in the outer ring of this bearing, the affixed boring bar of inner ring.
This Boring machine is furnished with centering apparatus, and this device comprises positioning sleeve, is arranged in the interior adjustment axle of positioning sleeve, is positioned at the locating piece to the wheel connection holes, and described adjustment axle is threaded with positioning sleeve, and the leading portion of adjusting axle is taper, and its conical surface cooperates with locating piece.
The useful technique effect of this Boring machine is: the speed of mainshaft is 8 times of original structure, the working (machining) efficiency height, and in light weight, clamping is easy and simple to handle laborsaving, and is accurate in looking for, quick.
Description of drawings
Fig. 1 is the structure diagram of this Boring machine
Fig. 2 is this Boring machine and the annexation figure (main spindle box end) to taking turns
Fig. 3 is the A-A profile of Fig. 2
Fig. 4 is the structure of centering frock and looks for middle installation diagram
Fig. 5 is the B-B profile of Fig. 4
Code name implication among the figure: 1-master's motor; The 2-main spindle box; The 3-driving gear; The 4-first member plate; The 5-micrometer adjustement boring tool; 6-is to wheel; 7-feeding motor; The 8-gear reduction box; The 9-leading screw; The 10-nut; The 11-key; The 12-driven gear; The 13-combination bearing; The 14-boring bar; The 15-right end plate; 16-band sleeve bearing; The 17-bolt; The 18-back-up block; The 19-end cap; The 20-locating piece; The 21-positioning sleeve; 22-adjusts axle; 23-jiggering gear; A, b, c-hole.
The specific embodiment
Referring to Fig. 1: this Boring machine is made up of boring bar, main shaft drive transmission device, feeding drive transmission device and anchor clamps four parts.Wherein, the main shaft drive transmission device comprises main motor 1, main spindle box 2.Main motor 1 adopts the MDMA of Panasonic series variable-frequency motor, power output 1.5Kw, and output torque 7.15N.M, maximum speed 3000r/min, rated speed 2000r/min satisfies technological requirement fully.Decelerators in the main spindle box 2 adopt gear, replace original worm gear/worm screw, the output shaft of the main motor 1 of its driving gear 3 connections, its driven gear 12 is connected with boring bar 14 through key 11, and with boring bar 14 axial sliding fits.Gearratio is reduced to 4 by original 40, and the boring bar rotating speed improves 10 times, and as long as one of former Boring machine boring about Kong Yaoyi hour now 8-10 minute, has greatly improved operating efficiency.And, because of the thickness of gear driving pair less than the secondary thickness of worm gear drive, can dwindle the axial dimension of main spindle box 2, weight reduction.A combination bearing 13 is adopted with supporting in the location of driven gear on main spindle box, replaces original a pair of angular contact ball bearing, and the thickness of combination bearing 13 also can dwindle the axial dimension of main spindle box 2, weight reduction less than a pair of angular contact ball bearing thickness.Particularly, the casing of main spindle box 2 is used the cast aluminium casting instead, and its density is 1/2.7 of cast iron, greatly reduces the weight of main spindle box 2, and is much more laborsaving during clamping.Main spindle box 2 is fixed on its end plate 4, and end plate 4 is fixed on taking turns on 6 by the anchor clamps clamping.
The feeding drive transmission device has also been done bigger improvement, has set up feeding motor 7, and drive no longer relies on main motor transmission, and feeding motor 7 is a frequency modulation motor, can adjust feed speed arbitrarily.Feed box adopts microminiature gear reduction box 8, its axial dimension is very little, both amounts of overhanging that can reduce, and (low pressure rotor and generator amature are to there being jiggering gear 23 in the middle of taking turns to the processing of wheel can to adapt to different profiles again, the cylindrical of jiggering gear is greater than to the wheel cylindrical), structure is very compact.The output shaft of feeding motor 7 connects the input of gear reduction box 8, the output of gear reduction box 8 connects leading screw 9, nut 10 is provided with the bearing 16 of band sleeve, the inner ring of this bearing 16 and boring bar 14 tight fits, like this, when leading screw 9 rotates, axial horizontal displacement takes place in nut 10, drags boring bar 14 synchronous shift, realizes feed motion, because of the inner ring of bearing 16 rotates with boring bar 14, so do not hinder main motion.The also available Hough watt replacement of bearing 16, its function is identical.Gear reduction box 8 is fixed on its end plate 15, and end plate 15 is fixed on taking turns on 6 by the anchor clamps clamping.Boring bar 14 is provided with micrometer adjustement boring tool 5, because of allowance 0.5～0.8mm only to the wheel connection holes, the adjustment stroke of micrometer adjustement boring tool 5: radius 3～5mm (the minimum depth of cut is 0.01mm) is greater than this allowance, simultaneously can guarantee that also the varying aperture in each hole is controlled in the small range on the circumference, reduce the amount of unbalance in the rotor rotation.The micrometer adjustement boring tool blade adopts carbide chip, its red hardness height, and change conveniently, need not whet a knife, significantly reduce non-cutting time.
When using this Boring machine, be to be fixed in on the wheel, referring to Fig. 2, Fig. 3: three hole a, b, c are respectively arranged on the two end plates 4,15, with corresponding one by one to the wheel connection holes, middle hole b is used to wear boring bar 14, and hole a, the c of both sides is used for clamping and holds bolt 17, fill up upper support piece 18 respectively at end plate 4,15 and to taking turns between 6 the back of the body end face, screwde on 17, end plate 4,15 just are fixed on taking turns on 6, and pad upper support piece 18 is convenient to add the processing situation of observing processed hole man-hour.
Before screwde on 17, use during frock looks in looking for, make on the end plate 4,15 the boring bar hole with to be processed to take turns connection holes same in.
Tool structure and method are referring to Fig. 4, Fig. 5 in looking for: frock comprises positioning sleeve 21, adjusts 22, four locating pieces 20 of axle, end cap 19 in looking for.Adjust axle 22 and be positioned at positioning sleeve 21, the two is by being threaded, and the leading portion of adjusting axle 22 has tapering, and its conical surface cooperates with locating piece 20, and awl section end face is provided with end cap 19, blocks locating piece 20, in case its landing.Look for when middle, positioning sleeve 21 is placed in the boring bar hole b of end plate 4,15, locating piece 20 puts in to be processed to the wheel connection holes, turn and adjust axle 22, locating piece 20 is ejected, because four locating pieces 20 are circumferentially equally distributed, when four locating pieces 20 all when wheel connection holes hole wall is contacted, boring bar hole b on the end plate 4,15 just inevitable with this to the wheel connection holes with in, at this moment, hold bolt 17 gripping again, end plate 4,15 is fixing, remove then and look for middle frock, other parts are installed on the end plate 4,15 again, can carry out boring processing.
Claims (9)
1. a Boring machine that is used for turbine rotor to the wheel connection holes comprises
The end plate of a pair of left and right layout and anchor clamps thereof, two end plates is separately fixed at left and right back of the body end face to wheel by its anchor clamps, and a side end panel is provided with boring bar bearing;
One main spindle box is fixed on the opposite side end plate, and this main spindle box is furnished with main motor, is furnished with main shaft decelerator and boring bar sliding bearing in the casing;
One feed box, be fixed on boring bar bearing the same side end plate on, be furnished with the feed gear wheel decelerator in the casing, end plate is provided with boring bar bearing and feeding transmission mechanism;
One boring bar, through in the wheel connection holes, the one end is positioned at main spindle box, is supported on the boring bar sliding bearing in this case, and the other end is supported on the boring bar bearing; Boring cutter is housed on the boring bar;
It is characterized in that:
Described main shaft decelerator adopts gear pair, and its driving gear connects the output shaft of main motor, and its driven gear is connected with the boring bar key, and with the boring bar axial sliding fit, be sliding bearing.
2. Boring machine according to claim 1, it is characterized in that: the bearing in the described main spindle box adopts combination bearing, and driven gear is fixed on the main shaft casing by combination bearing, and the driven gear endoporus is connected with the boring bar key, and with the boring bar axial sliding fit, play the sliding bearing effect.
3. Boring machine according to claim 1 is characterized in that: the casing of described main spindle box is made with aluminium or its alloy.
4. Boring machine according to claim 1 is characterized in that: described feed box is furnished with the feeding motor, and its output shaft connects the feed gear wheel decelerator, and the feed gear wheel decelerator connects the feeding transmission mechanism.
5. Boring machine according to claim 4 is characterized in that: described feeding motor adopts variable-frequency motor.
6. Boring machine according to claim 1 is characterized in that: described feeding transmission mechanism adopts screw pair, and described leading screw is fixed on the feed gear wheel decelerator, and described nut is connected with boring bar by active connection.
7. Boring machine according to claim 6 is characterized in that: described active connection is the bearing of band sleeve, the affixed nut in the outer ring of this bearing, the affixed boring bar of inner ring.
8. Boring machine according to claim 1 is characterized in that: described main motor adopts variable-frequency motor.
9. Boring machine according to claim 1, it is characterized in that: this Boring machine is furnished with centering apparatus, this device comprises positioning sleeve, is arranged in the interior adjustment axle of positioning sleeve, is positioned at the locating piece to the wheel connection holes, described adjustment axle is threaded with positioning sleeve, the leading portion of adjusting axle is taper, and its conical surface cooperates with locating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100505576A CN100534679C (en) | 2007-11-16 | 2007-11-16 | Boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100505576A CN100534679C (en) | 2007-11-16 | 2007-11-16 | Boring machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101157147A CN101157147A (en) | 2008-04-09 |
| CN100534679C true CN100534679C (en) | 2009-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100505576A Active CN100534679C (en) | 2007-11-16 | 2007-11-16 | Boring machine |
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| CN (1) | CN100534679C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101966599B (en) * | 2009-07-28 | 2012-03-28 | 广西玉柴机器股份有限公司 | Ring slot processing equipment and design method thereof |
| CN101844241B (en) * | 2010-05-22 | 2013-04-24 | 东方电气集团东方汽轮机有限公司 | Machining device for counter bore side of connection hole of turbine rotor and method thereof |
| CN102009192A (en) * | 2010-11-30 | 2011-04-13 | 宁夏长兴精密机械有限公司 | Machine tool spindle box capable of realizing bi-directional clamping |
| CN103600107B (en) * | 2013-12-03 | 2016-03-02 | 济南大学 | Radial feed boring bearing mounting hole inside holes device |
| CN106914645B (en) * | 2015-12-24 | 2019-08-06 | 上海电气电站设备有限公司 | Boring machine for rotor coupling scene bore hole |
| CN109317717A (en) * | 2017-08-01 | 2019-02-12 | 上海电气电站设备有限公司 | Numerical control cylinder boring machine for steam turbine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4668133A (en) * | 1985-10-01 | 1987-05-26 | Westinghouse Electric Corp. | Boring bar assembly |
| US5030041A (en) * | 1990-04-06 | 1991-07-09 | Westinghouse Electric Corp. | Compact boring system |
| DE4034903A1 (en) * | 1990-10-31 | 1992-05-07 | Ver Energiewerke Ag | Equipment for on-site line boring of turbine housing - has boring carriage travelling on through arbor supported at each end and by steady rest |
| CN2631674Y (en) * | 2003-06-27 | 2004-08-11 | 东方汽轮机厂 | High-accuracy boring machines |
| CN2710807Y (en) * | 2004-06-02 | 2005-07-20 | 哈尔滨汽轮机厂有限责任公司 | On-line boring mill for cylinder of steam turbine |
| EP1767294A1 (en) * | 2005-09-21 | 2007-03-28 | de Angelis, Giuseppe | Portable boring bar with continuous motion of the tool on the main bar through differential motion device |
| CN101020253A (en) * | 2007-02-28 | 2007-08-22 | 四川东风电机厂有限公司 | Machining process of inner and outer water distributing rings for water guide mechanism in through-flow turbine |
| CN200970645Y (en) * | 2006-11-29 | 2007-11-07 | 哈尔滨汽轮机厂有限责任公司 | Boring device for turbine low pressure cylinder bearing ball surface |
-
2007
- 2007-11-16 CN CNB2007100505576A patent/CN100534679C/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4668133A (en) * | 1985-10-01 | 1987-05-26 | Westinghouse Electric Corp. | Boring bar assembly |
| US5030041A (en) * | 1990-04-06 | 1991-07-09 | Westinghouse Electric Corp. | Compact boring system |
| DE4034903A1 (en) * | 1990-10-31 | 1992-05-07 | Ver Energiewerke Ag | Equipment for on-site line boring of turbine housing - has boring carriage travelling on through arbor supported at each end and by steady rest |
| CN2631674Y (en) * | 2003-06-27 | 2004-08-11 | 东方汽轮机厂 | High-accuracy boring machines |
| CN2710807Y (en) * | 2004-06-02 | 2005-07-20 | 哈尔滨汽轮机厂有限责任公司 | On-line boring mill for cylinder of steam turbine |
| EP1767294A1 (en) * | 2005-09-21 | 2007-03-28 | de Angelis, Giuseppe | Portable boring bar with continuous motion of the tool on the main bar through differential motion device |
| CN200970645Y (en) * | 2006-11-29 | 2007-11-07 | 哈尔滨汽轮机厂有限责任公司 | Boring device for turbine low pressure cylinder bearing ball surface |
| CN101020253A (en) * | 2007-02-28 | 2007-08-22 | 四川东风电机厂有限公司 | Machining process of inner and outer water distributing rings for water guide mechanism in through-flow turbine |
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| CN101157147A (en) | 2008-04-09 |
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