CN103166382B - The processing method of the circular transition section on bottom of central blind hole of generator amature - Google Patents
The processing method of the circular transition section on bottom of central blind hole of generator amature Download PDFInfo
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- CN103166382B CN103166382B CN201110418823.2A CN201110418823A CN103166382B CN 103166382 B CN103166382 B CN 103166382B CN 201110418823 A CN201110418823 A CN 201110418823A CN 103166382 B CN103166382 B CN 103166382B
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- boring
- centre bore
- blind hole
- central blind
- generator amature
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Abstract
The invention discloses a kind of processing method of circular transition section on bottom of central blind hole of generator amature, for processing the central blind hole of generator amature, the length of central blind hole is not less than 1800mm, and internal diameter is Ф 120 (+0.4/-0.2) mm, and surface roughness is Ra1.6; Comprise the following steps: the first step, to form internal diameter be the centre bore of Ф 115 ~ 118mm and radius is the sphere bottom outlet of 57 ~ 59mm; Second step, form the centre bore that internal diameter is Ф 119.4mm, the degree of depth of centre bore just connects with sphere bottom outlet, and surface roughness reaches Ra3.2; 3rd step, finish-milling sphere bottom outlet is to SR59.65mm, and surface roughness reaches Ra6.3; 4th step, several times slightly, finishing polish honing sphere bottom outlet and centre bore, finally reaches drawing requirement.The arc transition section that the present invention can eliminate bottom generator amature Ф 120mm centre bore connects tool marks, meets surface roughness requirements and the performance requirement of circular transition section on bottom of central blind hole, reaches the effect eliminating concentrated stress.
Description
Technical field
The present invention relates to a kind of processing method of generator amature, be specifically related to a kind of processing method of circular transition section on bottom of central blind hole of generator amature.
Background technology
Along with the rapid growth of power demand, generating equipment is fast-developing, also more and more higher to the requirement of generating equipment performance.Generator amature is the important composition part of generating set, being the key core part of generating equipment, is also the bridge of power conversion, by the high speed rotary motion of rotor by heat energy → mechanical energy → electric energy, realize the conversion of energy, thus complete generation and the transmission work of electric energy.Therefore, also more and more higher to the technical requirement of generator amature.
As shown in Figure 1, one end of this generator amature is provided with the central blind hole of Ф 120mm to the structure of typical generator amature; The bottom of this central blind hole has arc transition section, as shown in Figure 2;
The key technical indexes of this generator amature is as follows:
| Technical indicator | Unit | Size |
| Rotor total length | mm | 8165 |
| Centre bore length | mm | 2525 |
| Center-hole diameter | mm | Ф120(+0.4/-0.2) |
| Centre bore roughness | μm | Ra1.6 |
| Centre bore bottom transition section roughness | μm | Ra1.6 |
| Center hole circle run-out tolerance | mm | 0.2 |
In the fabrication process, there is following problem in this generator amature:
Adopt the circular transition section on bottom of central blind hole of the generator amature manufactured by prior art can leave some and significantly connect tool marks, easily produce concentrated stress, the required precision to rotor center blind hole and performance requirement cannot be met.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of processing method of circular transition section on bottom of central blind hole of generator amature, and what it can eliminate the circular transition section on bottom of central blind hole of generator amature connects tool marks.
For solving the problems of the technologies described above, the technical solution of the processing method of the circular transition section on bottom of central blind hole of generator amature of the present invention is:
For processing the central blind hole of generator amature, the length of central blind hole is not less than 1800mm, and internal diameter is Ф 120 (+0.4/-0.2) mm, and surface roughness is Ra1.6; Comprise the following steps:
The first step, adopts deep hole lathe, first uses cylindrical drill jacking on workpiece; Then use boring cutter, roughing, semifinishing are carried out to the inwall of centre bore, form the centre bore that internal diameter is Ф 115 ~ 118mm; Finally use twist drill cutter, forming radius is the sphere bottom outlet of 57 ~ 59mm;
In the process of described formation sphere bottom outlet, adopt many twist drill blades different for specification, repeatedly tool changing processing, is progressively processed to form sphere bottom outlet.
Second step, adopts deep hole lathe, uses floating boring head, floating boring head installs floating boring tool, half right boring, right boring are carried out to the inwall of centre bore, form the centre bore that internal diameter is Ф 119.4mm, the degree of depth of centre bore just connects with sphere bottom outlet, and surface roughness reaches Ra3.2;
Described floating boring head comprises boring head body, and the front end of boring head body is provided with boring cutter groove; This end of boring head body is provided with end cap, and the external diameter of end cap is less than the external diameter of boring head body, and end cap is provided with chamfering; Described floating boring tool is placed in the boring cutter groove of boring head body.
Described floating boring tool comprises boring cutter body, and the bilateral symmetry of boring cutter body is provided with boring blade; The central shaft of boring blade departs from the symmetry axis of boring cutter body.
3rd step, adopts deep hole lathe, uses twist drill cutter, and install the twist drill blade of R59.65mm, finish-milling sphere bottom outlet is to SR59.65mm, and surface roughness reaches Ra6.3; Have between the sphere bottom outlet obtained and centre bore that 0.05mm's connect cutter transition;
4th step, adopts deep hole lathe, uses and wraps up in gauze bistrique, wrap sand paper, and several times slightly, finishing polish honing sphere bottom outlet and centre bore, that eliminates 0.05mm connects cutter interim size, makes it to smoothly transit, and finally reaches drawing requirement.
The technique effect that the present invention can reach is:
The arc transition section that the present invention can eliminate bottom generator amature Ф 120mm centre bore connects tool marks, meets surface roughness requirements and the performance requirement of circular transition section on bottom of central blind hole, reaches the effect eliminating concentrated stress.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of generator amature;
Fig. 2 is the schematic diagram of the central blind hole of generator amature;
Fig. 3 is the structural representation of the floating boring head that the processing method of the circular transition section on bottom of central blind hole of generator amature of the present invention uses;
Fig. 4 is the structural representation of floating boring tool used in the present invention;
Fig. 5 is the right view of Fig. 4;
Fig. 6 is the schematic shapes of the pilot process of the bottom arc transition section that the present invention is formed;
Fig. 7 is the schematic shapes after the bottom arc transition section fine finishining that formed of the present invention before polishing honing.
Description of reference numerals in figure:
10 is boring head body, and 11 is boring cutter groove,
12 is end cap, and 20 is boring cutter body,
21 is boring blade, and 22 is bolt.
Embodiment
The processing method of the circular transition section on bottom of central blind hole of generator amature of the present invention, for processing the central blind hole of generator amature as shown in Figure 1 and Figure 2, the length of central blind hole is not less than 1800mm, and internal diameter is Ф 120 (+0.4/-0.2) mm, and surface roughness is Ra1.6; Comprise the following steps:
The first step, adopts deep hole lathe, first uses cylindrical drill jacking on workpiece; Then use boring cutter, roughing, semifinishing are carried out to the inwall of centre bore, form the centre bore that internal diameter is Ф 115 ~ 118mm; Finally use twist drill cutter, forming radius is the sphere bottom outlet of 57 ~ 59mm; Now can produce at the changeover portion of centre bore and sphere bottom outlet and significantly connect tool marks;
Formed in the process of sphere bottom outlet, can adopt many twist drill blades different for specification, repeatedly tool changing processing, is progressively processed to form sphere bottom outlet;
Note: central blind hole comprises centre bore and sphere bottom outlet, the changeover portion of centre bore and sphere bottom outlet is the bottom arc transition section of central blind hole;
Second step, adopts deep hole lathe, uses floating boring head, floating boring head installs floating boring tool, half right boring, right boring are carried out to the inwall of centre bore, form the centre bore that internal diameter is Ф 119.4mm, the degree of depth of centre bore just connects with sphere bottom outlet, and surface roughness reaches Ra3.2; Now bottom arc transition section shape as shown in Figure 6;
As shown in Figure 3, comprise boring head body 10, the front end of boring head body 10 is provided with boring cutter groove 11 to the structure of floating boring head; This end of boring head body 10 is provided with end cap 12, and the external diameter Ф 1 of end cap 12 is less than the external diameter Ф 2 of boring head body 10; End cap 12 is provided with chamfering;
Floating boring head used in the present invention is provided with end cap 12, external diameter due to end cap 12 is less than the external diameter of boring head body 10, the floating boring tool being installed on this end can be avoided to touch Spherical Bottom hole wall bottom centre bore in the course of the work, thus maximum feeding reaches transition point when can make the cutting blade work in-process central hole inwall of floating boring tool sheet, make it to be combined with sphere bottom outlet internal wall transitions starting point.
Floating boring tool is placed in the boring cutter groove 11 of boring head body 10;
The structure of floating boring tool as shown in Figure 4, Figure 5, comprises boring cutter body 20, and the bilateral symmetry of boring cutter body 20 is provided with boring blade 21; Boring blade 21 is fixedly connected with boring cutter body 20 by bolt 22;
The central shaft of boring blade 21 departs from the symmetry axis (namely the center of the center of the central shaft H2 of boring blade 21 and the symmetry axis H1 of boring cutter body 20 is not on the same line) of boring cutter body 20;
The boring blade 21 of floating boring tool used in the present invention departs from the symmetry axis of boring cutter body 20, the preposition axis departing from floating boring tool of cutting blade can be made in the course of processing, thus the degree of depth of centre bore can be made just to connect with sphere bottom outlet, the Working position that namely the blade institute feeding of boring blade reaches is transition tie point.
3rd step, adopts deep hole lathe, uses twist drill cutter, and install the twist drill blade of R59.65mm, finish-milling sphere bottom outlet is to SR59.65mm, and surface roughness reaches Ra6.3; Obtain Spherical Bottom hole shape as shown in Figure 7, now only have between sphere bottom outlet and centre bore that 0.05mm's connect cutter transition, centre bore and sphere bottom outlet basic forming, it is not obvious that changeover portion connects tool marks, smoother, only leaves mill amount;
4th step, adopt deep hole lathe, gauze bistrique is wrapped up in use, wrap sand paper, points of three times thick, finishing polish honing sphere bottom outlets and centre bore, that eliminates 0.05mm connects cutter interim size, make it to smoothly transit, and finally reach drawing requirement, ensure that bottom arc transition section smoothly transits, eliminate and connect tool marks and concentrated stress.
Claims (4)
1. the processing method of the circular transition section on bottom of central blind hole of a generator amature, it is characterized in that, for processing the central blind hole of generator amature, the length of central blind hole is not less than 1800mm, internal diameter is Φ 120 (+0.4/-0.2) mm, and surface roughness is Ra1.6 μm; Comprise the following steps:
The first step, adopts deep hole lathe, first uses cylindrical drill jacking on workpiece; Then use boring cutter, roughing, semifinishing are carried out to the inwall of centre bore, form the centre bore that internal diameter is Φ 115 ~ 118mm; Finally use twist drill cutter, forming radius is the sphere bottom outlet of 57 ~ 59mm;
Second step, adopts deep hole lathe, uses floating boring head, floating boring head installs floating boring tool, half right boring, right boring are carried out to the inwall of centre bore, form the centre bore that internal diameter is Φ 119.4mm, the degree of depth of centre bore just connects with sphere bottom outlet, and surface roughness reaches Ra3.2 μm;
3rd step, adopts deep hole lathe, uses twist drill cutter, and install the twist drill blade of R59.65mm, finish-milling sphere bottom outlet is to SR59.65mm, and surface roughness reaches Ra6.3 μm; Have between the sphere bottom outlet obtained and centre bore that 0.05mm's connect cutter transition;
4th step, adopts deep hole lathe, uses and wraps up in gauze bistrique, wrap sand paper, and several times slightly, finishing polish honing sphere bottom outlet and centre bore, that eliminates 0.05mm connects cutter interim size, makes it to smoothly transit, and finally reaches drawing requirement.
2. the processing method of the circular transition section on bottom of central blind hole of generator amature according to claim 1, it is characterized in that: the described first step uses twist drill cutter, formed in the process of sphere bottom outlet, adopt many twist drill blades different for specification, repeatedly tool changing processing, is progressively processed to form sphere bottom outlet.
3. the processing method of the circular transition section on bottom of central blind hole of generator amature according to claim 1, is characterized in that: described floating boring head comprises boring head body, and the front end of boring head body is provided with boring cutter groove; This end of boring head body is provided with end cap, and the external diameter of end cap is less than the external diameter of boring head body, and end cap is provided with chamfering; Described floating boring tool is placed in the boring cutter groove of boring head body.
4. the processing method of the circular transition section on bottom of central blind hole of the generator amature according to claim 1 or 3, is characterized in that: described floating boring tool comprises boring cutter body, and the bilateral symmetry of boring cutter body is provided with boring blade; The central shaft of boring blade departs from the symmetry axis of boring cutter body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110418823.2A CN103166382B (en) | 2011-12-14 | 2011-12-14 | The processing method of the circular transition section on bottom of central blind hole of generator amature |
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| CN201110418823.2A CN103166382B (en) | 2011-12-14 | 2011-12-14 | The processing method of the circular transition section on bottom of central blind hole of generator amature |
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| CN103166382A CN103166382A (en) | 2013-06-19 |
| CN103166382B true CN103166382B (en) | 2015-10-28 |
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| CN109014778B (en) * | 2018-07-25 | 2020-06-09 | 中国航空工业集团公司西安飞行自动控制研究所 | Numerical control machining method for sealing ring groove of non-rotating part |
| CN112404911B (en) * | 2020-12-07 | 2022-08-16 | 大连瑞谷科技有限公司 | Processing technology for pocket hole of spherical roller bearing retainer |
| CN112615500A (en) * | 2020-12-14 | 2021-04-06 | 山东中际智能装备有限公司 | Pull-back type paper cutting device |
| CN112676765A (en) * | 2020-12-30 | 2021-04-20 | 西安成立航空制造有限公司 | Inner spherical surface machining process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839818A (en) * | 2009-03-19 | 2010-09-22 | 上海重型机器厂有限公司 | Trepanning sampling method of blind hole of ultralong deep hole and cut-off tool |
| CN102091937A (en) * | 2009-12-15 | 2011-06-15 | 上海重型机器厂有限公司 | Machining method of thermal power rotors |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62244256A (en) * | 1986-04-15 | 1987-10-24 | Hitachi Ltd | Method and apparatus for correcting balance of laminated rotor for rotary electric machine |
| JP2001310207A (en) * | 2000-04-28 | 2001-11-06 | Toyota Motor Corp | Boring method and boring tool |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839818A (en) * | 2009-03-19 | 2010-09-22 | 上海重型机器厂有限公司 | Trepanning sampling method of blind hole of ultralong deep hole and cut-off tool |
| CN102091937A (en) * | 2009-12-15 | 2011-06-15 | 上海重型机器厂有限公司 | Machining method of thermal power rotors |
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