CN101020294A - Process of machining steam bleeding slot in lower holding ring of steam turbine - Google Patents
Process of machining steam bleeding slot in lower holding ring of steam turbine Download PDFInfo
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- CN101020294A CN101020294A CN 200610148704 CN200610148704A CN101020294A CN 101020294 A CN101020294 A CN 101020294A CN 200610148704 CN200610148704 CN 200610148704 CN 200610148704 A CN200610148704 A CN 200610148704A CN 101020294 A CN101020294 A CN 101020294A
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Abstract
The present invention relates to process of machining steam bleeding slot in lower holding ring of steam turbine. The machining process in a numerically controlled vertical lathe includes the following steps: mounting inclined slot cutter and setting zero position of the cutter; cutting with short cutter and cutting with long cutter to the target depth of the inclined slot. During the machining, sectioned machining and bidirectional cutting are adopted, the cutter is always in excellent cutting state, and proper machining allowance is left before finish cutting. The present invention has high machining efficiency and high machining quality.
Description
(1) technical field
The present invention relates to steam turbine low-pressure and hold ring skewed slot mechanical processing technique.
(2) background technology
The steam turbine low-pressure stationary blade carrier groove that directly draws gas is to process with straight cutter on common vertical lathe.Straight trough processing, feed is a direction.Be installed on the general blade row at straight cutter on the vertical lathe, make unidirectional cutting movement, process the straight channel type groove that draws gas.Now the low pressure stationary blade carrier of the 350MW steam turbine groove that draws gas is the skewed slot form, adopts common unidirectional feed and general blade row can't process.
(3) summary of the invention
The object of the present invention is to provide a kind of process of machining steam bleeding slot in lower holding ring of steam turbine, this skewed slot processing technology adopts the digital control two-way tool track synthetic, walks out the oblique line machining path, finishes the processing of the groove that tiltedly draws gas, this processing technology working (machining) efficiency height, quality is guaranteed.
The present invention is achieved in that a kind of process of machining steam bleeding slot in lower holding ring of steam turbine, it is characterized in that: follow these steps to carry out:
The first step, clamping skewed slot cutter is provided with cutter tool setting zero-bit;
In second step, take earlier little by little to process skewed slot and to arrive projected depth with the order of long cutter behind the short cutter;
In the 3rd step, staged and layered is processed;
The 4th step, adopt two-way feed cutting, first cutter and second cutter have ladder, and the intersection feed is half cutting to a cutter during cutting, and half cuts and cuts, and the knife geometric angle is in good cutting state all the time;
In the 5th step, determine to borrow value and cutting number of times partially according to groove width and knife cutting edge width, and leave the allowance that last essence is cut groove;
In the 6th step, determine the segmentation degree of depth according to the numerical value of knife cutting rigidity and groove depth;
The 7th step, carry out slightly, carefully cut groove earlier, groove width and bottom land all will have suitable allowance;
In the 8th step, essence is cut groove, cuts accurate groove width and bottom land circular arc.
Described to determine to borrow partially value and cutting number of times according to groove width and knife cutting edge width be to borrow partially for 2～3 times to cut, and bias is 0.3～0.4.
Described numerical value according to knife cutting rigidity and groove depth is determined general 3～4 sections of the segmentation degree of depth.
The present invention is the processing of groove of tiltedly drawing gas on numerical control vertical lathe, adopts the digital control two-way tool track synthetic, and the processing technology of cutting is partially borrowed in the segmentation feed, finishes the processing of the groove that tiltedly draws gas, this processing technology working (machining) efficiency height, and quality is guaranteed.
(4) description of drawings
Fig. 1 is the steam bleeding slot in lower holding ring of steam turbine structural representation;
Fig. 2 is an embodiment of skewed slot processing technology of the present invention.
Among the figure: 1 groove that draws gas, 2 holes of drawing gas, 3 straight cutteves, 4 round end cutteves, the 5 groove processing sequence numberings of drawing gas.
(5) specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, Fig. 2, for a steam bleeding slot in lower holding ring of steam turbine groove depth L=80mm, the processing technology of groove width B=25mm follows these steps to carry out:
The first step, clamping skewed slot cutter is provided with cutter tool setting zero-bit;
In second step, take earlier little by little to process skewed slot and to arrive projected depth with the order of long cutter behind the short cutter; Wherein: adopt the wide cutter of 12mm by the groove processing sequence numbering processing 1～15 of drawing gas shown in Figure 2; Use the wide cutter processing of 8mm numbering 16～19 then instead;
In the 3rd step, as shown in Figure 2, processing sequence is that staged and layered is processed, and promptly numbers 1～19, divides 19 cuttves to process;
The 4th step, adopt two-way feed cutting, first cutter and second cutter have ladder, and the intersection feed is half cutting (single-blade) to a cutter during cutting, and half cuts and cuts (twolip), and the knife geometric angle is in good cutting state all the time.If not adopting the feed of ladder cutting intersection, then be the twolip cutting all the time concerning knife, promptly cut and cut, resistance is big in working angles, and working (machining) efficiency is low.
The 5th step was 25mm and wide cutter of knife cutting edge width 12mm and the wide cutter of 8mm according to the groove width B that will process, and determining to borrow inclined to one side value and cutting number of times is 2 times or 3 times, and bias is 0.3～0.4, and leaves the allowance that last essence is cut groove;
The 6th step was that the numerical value of 80mm determines that the segmentation degree of depth is 3 sections according to knife cutting rigidity and groove depth L, and the knife of using different length instead cuts;
The 7th step, carry out slightly, carefully cut groove earlier, groove width and bottom land all will have suitable allowance;
In the 8th step, essence is cut groove, cuts accurate groove width and bottom land circular arc, uses R7.5 round end cutter instead, along the skewed slot profile, divides thick, smart two cuttves processing.
The present invention is the processing of groove of tiltedly drawing gas on numerical control vertical lathe, adopts the digital control two-way tool track synthetic, and the processing technology of cutting is partially borrowed in the segmentation feed, finishes the processing of the groove that tiltedly draws gas, this processing technology working (machining) efficiency height, and quality is guaranteed.
Below be the main program of processing the groove that tiltedly draws gas, corresponding to Fig. 1 and Fig. 2, and have simple declaration: the main program of processing the groove that tiltedly draws gas
：
N196(GONG?BU?6)
N198?R00＝107?L7
：200?G00?G90?G54?X1770?Z100?D90?S300?M05
N202?Z-450
N204 L57 (slightly cutting the subprogram of the groove that tiltedly draws gas)
N206?X1700
：208?G00?G90?G54?X1700?Z100?D90?S300?M05
N210?Z-450
N212 L58 (half smart subprogram of cutting the groove that tiltedly draws gas)
N214?X1700
：216?G00?G90?G54?X1700?Z100?D89?S300?M05
N218?Z-450
N220 L59 (essence is cut the subprogram of the groove that tiltedly draws gas)
N222?X1700
N224?G00?Z100?M05?M09
%SPF 57 (slightly cutting trough)
(R01-X is to Chi Cun ﹠amp for N10 R01=2032.6094 R02=-489.6408; R02-Z is first withdrawing point to size)
N12 R03=2071.2224 R04=-476.4204 (R03﹠amp; R04 is second withdrawing point)
N14?G00?Z-480?D89?S200?M05
N16?X＝R01?Z＝R02
N18 G01 X2049.580 Z-498.126 F0.5 M03 (first feed point is appreciated that the rectangle 1 among Fig. 2) X-axis Z axle diaxon interlock (feed simultaneously)---two-way feed)
N20 X=R01 Z=R02 F5 (withdrawing)
N22 X=R03 Z=R04 D90 (withdrawing)
N24 X2082.106 Z-481.863 F0.5 (second feed point is appreciated that the rectangle 2 among Fig. 2)
N26?X＝R03?Z＝R04?F5
N28?X＝R01?Z＝R02?D89
N30?X2042.508?Z-494.591
N32 X2056.652 Z-501.662 F0.5 (the 3rd feed point is appreciated that the rectangle 3 among Fig. 2)
N34?X＝R01?Z＝R02?F5
N36?X＝R03?Z＝R04?D90
N38?X2075.036?Z-478.327
N40 X2089.178 Z-485.398 F0.5 (the 4th feed point is appreciated that the rectangle 4 among Fig. 2)
：
：
N226?X2153.5246?Z-523.9355
N228 X2165.014 Z-529.6801 F0.5 (the 19 feed point is appreciated that the rectangle 19 among Fig. 2)
N230?X＝R03?Z＝R04?F5
N232?M17
Claims (3)
1. process of machining steam bleeding slot in lower holding ring of steam turbine is characterized in that: follow these steps to carry out:
The first step, clamping skewed slot cutter is provided with cutter tool setting zero-bit;
In second step, take earlier little by little to process skewed slot and to arrive projected depth with the order of long cutter behind the short cutter;
In the 3rd step, staged and layered is processed;
The 4th step, adopt two-way feed cutting, first cutter and second cutter have ladder, and the intersection feed is half cutting to a cutter during cutting, and half cuts and cuts, and the knife geometric angle is in good cutting state all the time;
In the 5th step, determine to borrow value and cutting number of times partially according to groove width and knife cutting edge width, and leave the allowance that last essence is cut groove;
In the 6th step, determine the segmentation degree of depth according to the numerical value of knife cutting rigidity and groove depth;
The 7th step, carry out slightly, carefully cut groove earlier, groove width and bottom land all will have suitable allowance;
In the 8th step, essence is cut groove, cuts accurate groove width and bottom land circular arc.
2. process of machining steam bleeding slot in lower holding ring of steam turbine according to claim 1 is characterized in that: determining to borrow partially value and cutting number of times according to groove width and knife cutting edge width is to borrow partially for 2～3 times to cut, and bias is 0.3～0.4.
3. process of machining steam bleeding slot in lower holding ring of steam turbine according to claim 1 is characterized in that: the numerical value according to knife cutting rigidity and groove depth is determined general 3～4 sections of the segmentation degree of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610148704 CN101020294A (en) | 2006-12-30 | 2006-12-30 | Process of machining steam bleeding slot in lower holding ring of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610148704 CN101020294A (en) | 2006-12-30 | 2006-12-30 | Process of machining steam bleeding slot in lower holding ring of steam turbine |
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| Publication Number | Publication Date |
|---|---|
| CN101020294A true CN101020294A (en) | 2007-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610148704 Pending CN101020294A (en) | 2006-12-30 | 2006-12-30 | Process of machining steam bleeding slot in lower holding ring of steam turbine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500759A (en) * | 2011-10-25 | 2012-06-20 | 隆昌山川精密焊管有限责任公司 | Machining process for chute on piston rod of automobile |
| CN103128312A (en) * | 2011-12-05 | 2013-06-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Machining process controlling deformation of thin-wall disk part |
| CN103286324A (en) * | 2013-05-28 | 2013-09-11 | 沈阳黎明航空发动机(集团)有限责任公司 | One-step machining and forming method for grooves of high-temperature alloy integral casings |
| CN106424758A (en) * | 2016-11-25 | 2017-02-22 | 北京动力机械研究所 | Machining method of numerical control lathe |
| CN106938343A (en) * | 2017-05-05 | 2017-07-11 | 中国长江动力集团有限公司 | The processing method and parameterization macro program digital control programming method of inner circle helical teeth or skewed slot |
| CN110744071A (en) * | 2019-11-18 | 2020-02-04 | 中国航发贵州黎阳航空动力有限公司 | Method for machining deep and narrow groove with angle |
| CN112059207A (en) * | 2020-09-16 | 2020-12-11 | 中国航发沈阳黎明航空发动机有限责任公司 | Efficient grooving machining method applied to turning |
| CN113414437A (en) * | 2021-08-23 | 2021-09-21 | 无锡市润和机械有限公司 | Machining method for multiple different-position grooves of aero-engine compressor |
-
2006
- 2006-12-30 CN CN 200610148704 patent/CN101020294A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500759A (en) * | 2011-10-25 | 2012-06-20 | 隆昌山川精密焊管有限责任公司 | Machining process for chute on piston rod of automobile |
| CN102500759B (en) * | 2011-10-25 | 2013-06-19 | 隆昌山川精密焊管有限责任公司 | Machining process for chute on piston rod of automobile |
| CN103128312A (en) * | 2011-12-05 | 2013-06-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Machining process controlling deformation of thin-wall disk part |
| CN103286324A (en) * | 2013-05-28 | 2013-09-11 | 沈阳黎明航空发动机(集团)有限责任公司 | One-step machining and forming method for grooves of high-temperature alloy integral casings |
| CN103286324B (en) * | 2013-05-28 | 2016-06-15 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of superalloy integral casing groove time processing forming method |
| CN106424758A (en) * | 2016-11-25 | 2017-02-22 | 北京动力机械研究所 | Machining method of numerical control lathe |
| CN106424758B (en) * | 2016-11-25 | 2018-10-26 | 北京动力机械研究所 | A kind of processing method of numerical control lathe |
| CN106938343A (en) * | 2017-05-05 | 2017-07-11 | 中国长江动力集团有限公司 | The processing method and parameterization macro program digital control programming method of inner circle helical teeth or skewed slot |
| CN110744071A (en) * | 2019-11-18 | 2020-02-04 | 中国航发贵州黎阳航空动力有限公司 | Method for machining deep and narrow groove with angle |
| CN112059207A (en) * | 2020-09-16 | 2020-12-11 | 中国航发沈阳黎明航空发动机有限责任公司 | Efficient grooving machining method applied to turning |
| CN113414437A (en) * | 2021-08-23 | 2021-09-21 | 无锡市润和机械有限公司 | Machining method for multiple different-position grooves of aero-engine compressor |
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Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
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Effective date of registration: 20080509 Address after: Shanghai, Minhang, pro Spring Road, No. 188, zip code: 201100 Applicant after: Shanghai Electric Station Equipment Co., Ltd. Address before: Postal code 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Applicant before: Shanghai Steam Turbine Co., Ltd. |
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