CN109746651A - A kind of generator pit and end cap pin hole are the same as the processing method that drills and reams - Google Patents
A kind of generator pit and end cap pin hole are the same as the processing method that drills and reams Download PDFInfo
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- CN109746651A CN109746651A CN201910203273.9A CN201910203273A CN109746651A CN 109746651 A CN109746651 A CN 109746651A CN 201910203273 A CN201910203273 A CN 201910203273A CN 109746651 A CN109746651 A CN 109746651A
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- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims description 29
- 230000003746 surface roughness Effects 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 238000003754 machining Methods 0.000 description 1
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Abstract
The present invention discloses a kind of generator pit and end cap pin hole with the processing method that drills and reams.The big end cap of large turbo-type generator is fixed on out frame according to pre- screwde on after the centering of stator center position, and big end cap and out frame need to carry out accurately repeating positioning for the big end cap of later period demolition, installation with the Φ 24H7- Φ 30H7mm pin hole that drills and reams.The present invention solves only to carry out the big end cap of base with the pin hole that drills and reams with removable boring machine by magnetic force drill jig, and repeatability positioning precision is poor, bores, the problem of reamer tool stability difference.The present invention utilizes feed speed, the cutting rotational speeds parameter during removable boring machine " brill-expansion-hinge " pin hole processing using fixation, it solves to lead to that pin hole can not finally cut with scissors circle due to boring spindle center steering error is big because converting feed speed, cutting rotational speeds, by enchancement factor and by constantly amplifying pin hole size, or even the defect that concession uses；This method can be realized pin hole dimensional accuracy and reach interchangeability requirement, the complicated processes from matching pin according to pin hole in the past.
Description
Technical field
The present invention relates to a kind of generator pits and end cap pin hole with drill and ream processing method, especially large turbo-type generator
The large size such as base and its big end cap assembly need to be with removable boring machine with the pin hole that drills and reams.
Background technique
After the completion of large turbo-type generator stator, rotor center can be with stator center one when finally installing for generator
It causes (espespecially end bracket type bearing generator), needs to pre-install big end cap according to stator center, generally big end cap and generator are fixed at this time
Son is needed with the pin hole that drills and reams, and reference for installation of the pin hole as big end cap is entirely limited it relative to the opposite of generator unit stator
Position, and fill repeatedly convenient for the later period, tear big end cap open and guarantee its repetitive positioning accuracy.Since the figure of generator and tonnage are equal at this time
The range of work for having exceeded the equipment such as drilling machine is typically chosen removable boring machine and directly carries out same drill and ream.
It generally moves boring machine using Φ 110 directly to carry out with the processing that drills and reams base and big end cap, generator two sides are big
End cap is total to need to process four pin holes, and each pin hole is both needed to removable boring machine centering and fixation again, as shown in fig. 6, conventional
Removable boring machine is with the pin hole process flow that drills and reams, wherein boring the size selection in just hole will cut according to what removable boring machine can bear
It cuts power and institute's cutting workpiece material requirements is selected；Thick drilling operating process is segmented into one to three work step, thick every time to bore
Hole borehole enlargement 4mm；Reaming procedure is segmented into one to three work step, each reaming borehole enlargement 2mm；General surplus when fraising
It is 0.20-0.60mm.For example, boring Φ 30H7mm pin hole, 1, first thick drilling are divided to two work steps: boring just hole Φ 20mm- and be slightly drilled into Φ
24mm moves boring machine cutting rotational speeds 300r/min, feed speed 0.20mm/r；2, reaming, point three work steps: reaming Φ
26mm- reaming Φ 28mm- reaming Φ 29.4mm moves boring machine cutting rotational speeds 200r/min, feed speed 0.12mm/r；3, it cuts with scissors
Hole Φ 30H7mm moves boring machine cutting rotational speeds 60r/min, feed speed 0.30mm/r.
Due in entire " brill-expansion-hinge " process, cutter bar of boring lathe and cutter are leant out apart from long, are easy processing
Bending deformation is generated in the process, and repetitive positioning accuracy is poor；In addition, constantly converting removable boring spindle to finishing from roughing
Cutting rotational speeds and cutting feed speed easily increase machine tool chief axis center steering error.Factors above seriously affects adding for pin hole
Working medium amount, easily generation pin hole do not cut with scissors circle, and pin bore surface has the defects of ripple, roughness, circularity over tolerance, for this purpose, must not
Do not expand pin hole size, by probability factor or even the use that must not stand fast, seriously affects the big end cap installation essence of later period generator
Degree.Pin hole dimensional accuracy can not control in advance, need in fact with pin, under production efficiency is relatively low.
Interchangeability requirement is realized in order to control pin hole machined dimensional accuracy, is avoided according to pin hole with the numerous of processing pin
Trivial technical process will propose a kind of generator pit and end cap pin hole with the processing method that drills and reams, using fixed machine tool chief axis cutting
The machined parameters and magnetic force drill jig auxiliary positioning of revolving speed and feed speed are improved to large-scale assembly with drill and ream pin hole precision and life
Produce efficiency.
Summary of the invention
The present invention provides a kind of generator pits and end cap pin hole with the processing method that drills and reams, and adds in order to control pin hole
Work dimensional accuracy and realize interchangeability requirement, avoid according to pin hole with processing pin cumbersome technical process.The present invention is using such as
Shown in Fig. 7, boring machine is moved always using main shaft cutting rotational speeds when final fraising and feed speed as entire " brill-expansion-hinge "
Machining tool cutting parameter immobilizes, and realizes the purpose for fully controlling pin hole dimensional accuracy.The technical solution of the present invention is as follows:
1) boring machine (10) are moved and are placed in stator (5) needs with the pin hole side that drills and reams, are adjusted in removable boring machine (10) main shaft
The heart is vertical with stator (5) end face, and it is fixed to move boring machine (10)；
2) thick drill (7) are mounted on removable boring machine boring bar (11), position is got ready to knife according to scribing line；
3) the magnetic force drill jig (1) equipped with thick drilling drill bushing (2) is adsorbed on big end cap (6) and is adjusted according to tool setting position
It is fixed, it moves boring machine (10) and slightly bores just hole, thick to bore just pore size Φ 15-20mm, thick drilling is divided into one to three work step, every time
Aperture size expands 4mm；
4) removable boring machine (10) main shaft cutting rotational speeds, i.e. drill speed are set as hinge pin hole Shi Xuanyong when slightly drilling every time
Fraising revolving speed, the fraising feed speed of removable boring machine (10) when feed speed selects hinge pin hole when thick drilling every time；
5) the thick drilling drill bushing of replacement is reamer drill bushing (3), and bit change-over is reaming bit (8), reaming sequence be divided into one to
Three work steps, each borehole enlargement 2mm and more bit change and the drill bushing for being changed to corresponding aperture, aperture size is gradually close to final
Size；
6) removable boring machine (10) main shaft cutting rotational speeds, i.e. drill speed are set as hinge pin Kong Shixuan when reaming is processed every time
Fraising revolving speed, the fraising feed speed of removable boring machine (10) when feed speed selects hinge pin hole when each reaming is processed；
7) replacement reamer drill bushing is fraising drill bushing (4), and reaming bit is changed to reamer (9), and fraising processing capacity is 0.20-
0.60mm, fraising bottom outlet is determined by upper sequence reaming final size, moves the feed speed of boring machine (10) when fraising and main shaft is cut
Cut revolving speed keeps fraising revolving speed and fraising feed speed initial value constant respectively；
8) detection processes the hole quality in hole with drilling and reaming, and checks the surface roughness and circular degree of pore-forming, the circumference of pore-forming
Degree aperture difference in overall length is less than 0.02mm, surface roughness Ra3.2；
9) magnetic force drill jig (1) and removable boring machine (10) are removed, repeatedly 7) step 1) is to, processing remaining pin hole.
Technical effect: this to be assisted using magnetic force drill jig with the pin hole processing technology that drills and reams, easy to operate, raising positioning accuracy
With the stability of processing；It drills and reams using the machined parameters progress of fixed machine tool chief axis cutting rotational speeds and feed speed is same, raising pair
Large-scale assembly is the same as drill and ream pin hole precision and production efficiency.This method can effective control pin pore size precision, effectively avoid producing
Raw pin hole does not cut with scissors circle, and pin bore surface has the defects of ripple, roughness, circularity over tolerance；It avoids pin hole size gradually amplifying increasing
The method for adding fraising number to rely on probability factor, seriously affects the big end cap installation accuracy of later period generator.Make the pin processed
Hole can avoid meeting interchangeability and actual installation required precision with processing pin in the margin of tolerance finally required, and
Improve assembly efficiency.
Detailed description of the invention
Fig. 1 magnetic force drill jig is the same as the pin hole schematic diagram that drills and reams
Fig. 2 magnetic force drill jig is the same as the pin hole cross-sectional view that drills and reams
The thick drilling drill bushing schematic diagram of Fig. 3
Fig. 4 reamer drill bushing schematic diagram
Fig. 5 fraising drill bushing schematic diagram
Fig. 6 is conventional with the pin hole process flow chart that drills and reams
Fig. 7 present invention is the same as the pin hole process flow chart that drills and reams
Fig. 8 present invention is the same as the Φ 30H7mm pin hole process flow chart that drills and reams
Fig. 9 present invention is the same as the Φ 24H7mm pin hole process flow chart that drills and reams
Wherein: 1 magnetic force drill jig, 2 thick drilling drill bushings, 3 reamer drill bushings, 4 fraising drill bushings, 5 stators, 6 big end caps, 7 thick brills
Drill, 8 reaming bits, 9 reamers, 10 removable boring machines, 11 removable boring machine boring bars
Specific embodiment:
A kind of generator pit and end cap pin hole with the processing method that drills and reams, can be used for the big end cap of large turbo-type generator according to
Pre- screwde on is fixed on out frame after the centering of stator center position, and big end cap and out frame need to be carried out with the Φ that drills and reams
24H7- Φ 30H7mm pin hole, tonnage exceed general machine tooling range, assist same drill and ream with removable boring machine and magnetic force drill jig
Pin hole, concrete technology method include:
Embodiment one: as shown in figure 8, as follows with the Φ 30H7mm pin hole specific implementation step that drills and reams: 1), as shown in Figure 1, can
Moving boring machine 10 is placed in stator 5 and needs with the pin hole side that drills and reams, and removable 10 main-shaft core of boring machine of adjustment is vertical with 5 end face of stator,
Removable boring machine 10 is fixed；2), as shown in figures 1 and 3, thick drill 7 is mounted on removable boring machine boring bar 11, according to drawing
Line gets position ready to knife；3), as depicted in figs. 1 and 2, the magnetic force drill jig 1 equipped with thick drilling drill bushing 2 is adsorbed on big end cap 6
And adjusted and fixed according to tool setting position, it moves boring machine 10 and slightly bores just hole, thick to bore just pore size Φ 20mm, thick drilling is divided into two
Work step: it bores just hole Φ 20mm- and is slightly drilled into Φ 24mm, each aperture size expands 4mm；4), as shown in figure 8, when slightly drilling every time
Removable 10 main shaft cutting rotational speeds of boring machine, i.e. drill speed are set as the fraising revolving speed 60r/min selected when hinge pin hole, thick every time
The fraising feed speed 0.30mm/r of boring machine 10 is moved when feed speed selects hinge pin hole when drilling；5), as shown in figure 4, more
Changing thick drilling drill bushing is reamer drill bushing 3, and bit change-over is reaming bit 8, and reaming sequence is divided into three work steps: reaming Φ 26mm-
Reaming Φ 28mm- reaming Φ 29.4mm, each borehole enlargement 2mm and more bit change and the drill bushing for being changed to corresponding aperture, aperture
Size is gradually close to final size；6) 10 main shaft cutting rotational speeds of boring machine, are moved when as shown in figure 8, reaming being processed every time, that is, are bored
Head revolving speed is set as the fraising revolving speed 60r/min selected when hinge pin hole, when feed speed selects hinge pin hole when each reaming is processed
The fraising feed speed 0.30mm/r of removable boring machine 10；7), as shown in figure 5, replacement reamer drill bushing is fraising drill bushing 4, expand
Drill is changed to Φ 30H7 reamer, and fraising processing capacity is 0.60mm, and the bottom outlet that reams is by upper sequence reaming final size Φ 29.4mm
It determines, the feed speed and main shaft cutting rotational speeds of removable boring machine 10 keep ream revolving speed 60r/min and fraising respectively when fraising
Feed speed 0.30mm/r initial value is constant；8), detection processes the hole quality in hole with drilling and reaming, check pore-forming surface roughness and
Circular degree, the circular degree of pore-forming aperture difference in overall length are less than 0.02mm, surface roughness Ra3.2；9) magnetic drill, is removed
Mould 1 and removable boring machine 10 repeat step 1) to 7), processing remaining pin hole.
Embodiment two: as shown in figure 9, as follows with the Φ 24H7mm pin hole specific implementation step that drills and reams: 1), as shown in Figure 1, can
Moving boring machine 10 is placed in stator 5 and needs with the pin hole side that drills and reams, and removable 10 main-shaft core of boring machine of adjustment is vertical with 5 end face of stator,
Removable boring machine 10 is fixed；2), as shown in figures 1 and 3, thick drill 7 is mounted on removable boring machine boring bar 11, according to drawing
Line gets position ready to knife；3), as depicted in figs. 1 and 2, the magnetic force drill jig 1 equipped with thick drilling drill bushing 2 is adsorbed on big end cap 6
And adjusted and fixed according to tool setting position, it moves boring machine 10 and slightly bores just hole, it is thick to bore just pore size Φ 18mm；4), as shown in figure 9,
Removable 10 main shaft cutting rotational speeds of boring machine, i.e. drill speed are set as the fraising revolving speed selected when hinge pin hole when thick drilling every time
20r/min moves the fraising feed speed 0.10mm/r of boring machine 10 when feed speed selects hinge pin hole when thick drilling every time；
5), as shown in figure 4, the thick drilling drill bushing of replacement is reamer drill bushing 3, bit change-over is reaming bit 8, and reaming sequence is divided into three works
Step: reaming Φ 20mm- reaming Φ 22mm- reaming Φ 23.5mm, each borehole enlargement 2mm and more bit change be changed to corresponding aperture
The drill bushing of diameter, aperture size is gradually close to final size；6), 10 main shaft of boring machine is moved when as shown in figure 9, reaming being processed every time
Cutting rotational speeds, i.e. drill speed are set as the fraising revolving speed 20r/min selected when hinge pin hole, feed speed when each reaming is processed
The fraising feed speed 0.10mm/r of boring machine 10 is moved when selecting hinge pin hole；7), as shown in figure 5, replacement reamer drill bushing is
Ream drill bushing 4, and reaming bit is changed to Φ 24H7 reamer, and fraising processing capacity is 0.50mm, and fraising bottom outlet is final by upper sequence reaming
Size Φ 23.5mm determines that the feed speed and main shaft cutting rotational speeds of removable boring machine 10 keep the revolving speed that reams respectively when fraising
20r/min and fraising feed speed 0.10mm/r initial value are constant；8), detection processes the hole quality in hole with drilling and reaming, and checks pore-forming
Surface roughness and circular degree, the circular degree of pore-forming aperture difference in overall length be less than 0.02mm, surface roughness is
Ra3.2；9) magnetic force drill jig 1 and removable boring machine 10, are removed, repeats step 1) to 7), processing remaining pin hole.
Finally, protection scope of the present invention is not limited to the above embodiments.Obviously, those skilled in the art can be right
The present invention carries out various changes and deformation without departing from scope and spirit of the present invention.If these changes and deformation belong to this hair
In the range of bright claim and its equivalent technologies, then the present invention is also intended to encompass including these changes and deformation.
Claims (1)
1. a kind of generator pit and the same processing method that drills and reams of end cap pin hole, it is characterized in that:
Include the following steps:
1) boring machine (10) moved be placed in stator (5) and need with drilling and reaming pin hole side, adjust removable boring machine (10) main-shaft core with
Stator (5) end face is vertical, and it is fixed to move boring machine (10)；
2) thick drill (7) are mounted on removable boring machine boring bar (11), position is got ready to knife according to scribing line；
3) the magnetic force drill jig (1) equipped with thick drilling drill bushing (2) is adsorbed on big end cap (6) and is adjusted according to tool setting position solid
It is fixed, it moves boring machine (10) and slightly bores just hole, thick to bore just pore size Φ 15-20mm, thick drilling is divided into one to three work step, every secondary aperture
Diameter dimension enlargement 4mm；
4) removable boring machine (10) main shaft cutting rotational speeds, i.e. drill speed are set as the hinge selected when hinge pin hole when slightly drilling every time
Hole revolving speed, the fraising feed speed of removable boring machine (10) when feed speed selects hinge pin hole when thick drilling every time；
5) the thick drilling drill bushing of replacement is reamer drill bushing (3), and bit change-over is reaming bit (8), and reaming sequence is divided into one to three
Work step, each borehole enlargement 2mm and more bit change and the drill bushing for being changed to corresponding aperture, aperture size is gradually close to final ruler
It is very little；
6) every time reaming processing when removable boring machine (10) main shaft cutting rotational speeds, i.e. drill speed is set as selecting when hinge pin hole
Ream revolving speed, the fraising feed speed of removable boring machine (10) when feed speed selects hinge pin hole when each reaming is processed；
7) replacement reamer drill bushing is fraising drill bushing (4), and reaming bit is changed to reamer (9), and fraising processing capacity is 0.20-
0.60mm, fraising bottom outlet is determined by upper sequence reaming final size, moves the feed speed of boring machine (10) when fraising and main shaft is cut
Cut revolving speed keeps fraising revolving speed and fraising feed speed initial value constant respectively；
8) detection processes the hole quality in hole with drilling and reaming, and checks the surface roughness and circular degree of pore-forming, the circular degree of pore-forming exists
Aperture difference is less than 0.02mm, surface roughness Ra3.2 in overall length；
9) magnetic force drill jig (1) and removable boring machine (10) are removed, repeatedly 7) step 1) is to, processing remaining pin hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203273.9A CN109746651A (en) | 2019-03-18 | 2019-03-18 | A kind of generator pit and end cap pin hole are the same as the processing method that drills and reams |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910203273.9A CN109746651A (en) | 2019-03-18 | 2019-03-18 | A kind of generator pit and end cap pin hole are the same as the processing method that drills and reams |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111318853A (en) * | 2020-03-31 | 2020-06-23 | 中国航发动力股份有限公司 | Machining method for improving flow precision of oil injection ring |
| CN112238331A (en) * | 2020-09-29 | 2021-01-19 | 山东诺维科轻量化装备有限公司 | Method for processing aluminum alloy car body long and large section notch |
| CN113949236A (en) * | 2021-11-23 | 2022-01-18 | 中国航空工业集团公司洛阳电光设备研究所 | Remanufacturing method of ferromagnetic motor stator |
| CN114654304A (en) * | 2022-04-19 | 2022-06-24 | 中国航发动力股份有限公司 | Machining method for guaranteeing position degree of precision hole based on compensation method |
| WO2023098138A1 (en) * | 2021-12-01 | 2023-06-08 | 哈尔滨汽轮机厂有限责任公司 | Machining method for same-position pin hole of outer cylinder actually matching machined pin hole of inner cylinder |
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| CN114654304A (en) * | 2022-04-19 | 2022-06-24 | 中国航发动力股份有限公司 | Machining method for guaranteeing position degree of precision hole based on compensation method |
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Application publication date: 20190514 |