CN104107943B - Million nuclear steam turbine pedestal plate finish-milling processing methods - Google Patents
Million nuclear steam turbine pedestal plate finish-milling processing methods Download PDFInfo
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- CN104107943B CN104107943B CN201410180815.2A CN201410180815A CN104107943B CN 104107943 B CN104107943 B CN 104107943B CN 201410180815 A CN201410180815 A CN 201410180815A CN 104107943 B CN104107943 B CN 104107943B
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Abstract
The present invention relates to a kind of million nuclear steam turbine pedestal plate finish-milling processing methods, the present invention is to solve pedestal board plane degree of the prior art and the not high problem of surface quality machining accuracy.The gradient of facing cutter is determined by this processing method mainly through dial gauge, and by angle of inclination processing pedestal plate, eliminate the generation connecing tool marks, thus solving the million nuclear steam turbine accurately machined difficult points of pedestal board plane, it is ensured that flatness and surface quality requirements after million nuclear steam turbine pedestal plate processing reach technology requirement.
Description
Technical field
The present invention relates to a kind of million nuclear steam turbine pedestal plate finish-milling processing methods.
Background technology
Million nuclear steam turbine pedestal board plane degree and surface quality requirements are very high, processing upper and lower surface on large-sized gantry milling machine, owing to the size of pedestal plate is big, milling cutter can not process by a cutter, can only as sweeping the floor, cutter one blade row becomes the track of parallel distance to complete the processing of monoblock pedestal plate；More few to connect tool marks more few for row's cutter track number simultaneously, and processing effect is more good.Thus need the milling cutter processing trying one's best big with diameter, if but milling cutter is sufficiently large will be amplified main shaft (column) end face and workbench parallelism error, this error general is main shaft (column) and workbench out of plumb causes, if the precision of dispatching from the factory of lathe is not high, or the phase of use is longer, capital causes machine tool chief axis (column) and verticality of work bench error excessive, such milling cutter can have gradient in a direction, tool marks are connect between two cuttves when causing finish-milling plane, monoblock pedestal plate is processed just as stair, million nuclear steam turbine pedestal board plane degree and surface quality machining accuracy is made not to reach the requirement of Ra3.2.
Summary of the invention
The invention aims to solve pedestal board plane degree of the prior art and the not high problem of surface quality machining accuracy, and a kind of million nuclear steam turbine pedestal plate finish-milling processing methods are provided, comprise the steps:
Step one, installing on machine tool chief axis by facing cutter, place one piece of dial gauge on platen, upwards, gauge outfit is pointed at the center that will not install the facing cutter of blade to gauge outfit；
Step 2, facing cutter is walked to the position from R place, facing cutter center along X-axis, wherein, R is the cutter hub inside radius of facing cutter, by circular interpolation make facing cutter walk when not rotating full circle track that radius is R, it is determined that high point position on the circumferencial direction of facing cutter and low dot location；
Step 3, by high point position, low dot location respectively with the difference record from R place, facing cutter center, calculated the angle angle of high point position and low dot location and X-axis by coordinate position；
Step 4, dial gauge is placed individually on high point position and low dot location, rotary milling tools dish, if dial gauge registration is constant, namely can be identified as facing cutter；
Step 5, from facing cutter center R+a and the R+b position located, respectively repeat steps two and step 3 record difference, when repeating step 2 and step 3, it is that R is replaced to respectively R+a and R+b, wherein, a, b are constant, and R+a and R+b is respectively less than equal to milling cutter diameter, and being directly proportional to cutter hub inside radius R by three groups of data difference calculates the difference of the high point position after loading onto blade and low dot location；
Step 6, by pedestal board placing on lathe, the centrage of pedestal plate is parallel with the high point position of facing cutter and low dot location line, facing cutter is loaded onto after blade at the direction linearly track of vertical high point position and low dot location line gang milling two cutter, in the difference range whether the high point position of verification machined surface and the difference of low dot location calculate in step 5, if in scope, continue following step；If not in scope, repeat step one to step 5；
Step 7, mapping out every cutter spacing M on pedestal plate, calculate the difference of height N of spacing M, difference of height N=(M/D) * X, X are the difference of the high point position of facing cutter and low dot location, and D is milling cutter diameter；
Machining locus is arrange along some parallel straight line orbits of vertical facing cutter high point position and the equidistant M in low dot location line direction, when facing cutter adds man-hour from downside toward high side along vertical facing cutter high point position and the equidistant M in low dot location line direction, next cutter raises N accordingly than a upper cutter main shaft；Otherwise, when adding man-hour from high side toward downside, next cutter reduces N accordingly than a upper cutter main shaft, processes successively；
Step 8, repetition step one process the another side of pedestal plate to step 7.
Compared with the prior art, the processing method of the present invention can make cutter rail arrange point-blank along high point position and the low dot location line direction of facing cutter, process pedestal plate by angle of inclination, it is possible to eliminate the generation connecing tool marks, after standing up, adopt same method processing opposite side plane.The invention solves the million nuclear steam turbine accurately machined difficult points of pedestal board plane, it is ensured that flatness and surface quality requirements after million nuclear steam turbine pedestal plate processing reach the Ra3.2 that technology requires.
Accompanying drawing explanation
The processing method cutter rail that Fig. 1 is the present invention moves towards schematic diagram；
Fig. 2 is the structural representation of facing cutter in the present invention；
Fig. 3 be in Fig. 1 A-A to schematic diagram；
In figure: 1, facing cutter 2, pedestal plate 3, cushion block.
Detailed description of the invention
Detailed description of the invention one: as shown in Figure 1, Figure 3, a kind of million nuclear steam turbine pedestal plate finish-milling processing methods, comprise the steps:
Step one, installing on machine tool chief axis by facing cutter 1, place one piece of dial gauge on platen, upwards, gauge outfit is pointed at the center that will not install the facing cutter of blade to gauge outfit；
Step 2, by facing cutter 1, along X-axis, (described X-axis refers to as shown in Figure 3, the direction, centrage O-O place of pedestal plate) walk to the position from R place, facing cutter center, wherein, R is the cutter hub inside radius of facing cutter, by circular interpolation make facing cutter 1 walk when not rotating full circle track that radius is R, it is determined that high point position on the circumferencial direction of facing cutter 1 and low dot location；
Step 3, by high point position, low dot location respectively with the difference record from R place, facing cutter center, calculated the angle angle of high point position and low dot location and X-axis by coordinate position；
Step 4, dial gauge is placed individually on high point position and low dot location, rotary milling tools dish 1, if dial gauge registration is constant, namely can be identified as facing cutter 1 and tilt；
Step 5, from facing cutter 1 center R+a and the R+b position located, respectively repeat steps two and step 3 record difference, when repeating step 2 and step 3, it is that R is replaced to respectively R+a and R+b, wherein, a, b are constant, and R+a and R+b is respectively less than equal to milling cutter diameter D that (described milling cutter diameter refers to after loading onto blade, the radially diameter within blade), it is directly proportional to cutter hub inside radius R by three groups of data difference and calculates the difference of the high point position after loading onto blade and low dot location；
Step 6, pedestal plate 2 is placed on lathe, the centrage of pedestal plate 2 is parallel with the high point position of facing cutter 1 and low dot location line, facing cutter 1 is loaded onto after blade at the direction linearly track of vertical high point position and low dot location line gang milling two cutter, in the difference range whether the high point position of verification machined surface and the difference of low dot location calculate in step 5, if in scope, continue following step；If not in scope, repeat step one to step 5；
Step 7, mapping out every cutter spacing M on pedestal plate 2, calculate the difference of height N of spacing M, difference of height N=(M/D) * X, X are the difference of the high point position of facing cutter 1 and low dot location, and D is milling cutter diameter；
Machining locus is arrange along some parallel straight line orbits of vertical facing cutter 1 high point position and the equidistant M in low dot location line direction, when facing cutter 1 adds man-hour from downside toward high side along vertical facing cutter high point position and the equidistant M in low dot location line direction, next cutter raises N accordingly than a upper cutter main shaft；Otherwise, when adding man-hour from high side toward downside, next cutter reduces N accordingly than a upper cutter main shaft, processes successively；
Step 8, repetition step one process the another side of pedestal plate to step 7.
Detailed description of the invention two: present embodiment and detailed description of the invention one the difference is that: in step 5, the difference of the high point position and low dot location of loading onto the facing cutter after blade can adopt laser detector directly to measure.
Detailed description of the invention three: present embodiment and detailed description of the invention one the difference is that: in step 7, when cutter step occur connecing in two cutter rail joints on machined surface, use cushion block 3 that with low dot location line direction, pedestal plate 2 is adjusted the height parallel with facing cutter 1 along the high point position of facing cutter 1.
Detailed description of the invention four: present embodiment and detailed description of the invention three the difference is that: the height H of cushion block 3 meets: H=(L/D) * X, wherein, L is the distance in the pedestal plate 2 high point position along facing cutter 1 and low dot location line direction, i.e. the lengthwise dimension of pedestal plate 2.
Detailed description of the invention five: present embodiment and detailed description of the invention one the difference is that: the selection range of milling cutter diameter D is at 200～600mm.
Below in conjunction with specific embodiment, beneficial effects of the present invention is described:
For milling cutter diameter for 600mm, first facing cutter 1 is installed on machine tool chief axis, platen is placed one piece of dial gauge, gauge outfit is upwards, gauge outfit is pointed at the center not filling blade facing cutter 1, facing cutter 1 is walked from 157.5mm place, facing cutter center along X-axis, by performing the program of one section of circular interpolation, facing cutter 1 is walked when not turning full circle track that radius is 157.5mm, thus can get and whether the circumferencial direction of facing cutter 1 has height, if had, by high point position and low dot location difference record, by coordinate position, (namely milling cutter is in the process walking a circle, the coordinate of the height recorded) the angle angle of high point position and low dot location and X-axis can be calculated；Dial gauge is placed individually into the high point position in 180 degree, low dot location, rotary milling tools dish 1, if dial gauge registration is constant, illustrate that whole facing cutter 1 tilts, it not high point position and the low dot location of facing cutter 1 deformation generation, again from facing cutter center 200mm, 300mm place repeats to find out high point position and low dot location respectively, and record difference, it is directly proportional to cutter hub inside radius the high point position that milling cutter diameter is 600mm that can calculate the facing cutter loading onto blade and low dot location difference by above three groups of data difference, if having laser detector can directly load onto blade can directly measure difference.
As shown in Figure 3, pedestal plate 2 is placed on lathe, the centrage O-O of pedestal plate 2 is parallel with the high point position of facing cutter 1 and low dot location line, within the scope of pedestal plate 2 allowance (allowance of general pedestal plate is at about 1mm), facing cutter 1 is loaded onto after blade at the P-P direction linearly track of vertical high point position and low dot location line gang milling two cutter, first, the high point position of machined surface and the difference of low dot location are verified whether in the difference range of above-mentioned calculating；Secondly, when there is connecing cutter step in two cutter rail joints on machined surface, use cushion block 3 that with low dot location line O-O direction, pedestal plate is adjusted the height parallel with facing cutter along the high point position of facing cutter, the height H of cushion block 3 meets: H=(L/600) * X, wherein, X is that facing cutter 1 is because tilting the difference of high point position and the low dot location produced, L is the length in the pedestal plate 2 high point position along facing cutter 1 and low dot location line direction, it is exactly along facing cutter 1 high point position and low dot location line direction length L side H more padded than opposite side by pedestal plate 2, make pedestal plate 2 plane parallel in high point position and low dot location line O-O direction with facing cutter 1.
Pedestal plate 2 is mapped out every cutter spacing M, calculate the difference of height N of spacing M, difference of height N=(M/600) * X, machining locus is some parallel straight line orbits arrangement of the equidistant M in direction along vertical facing cutter 1 high point position and low dot location line P-P, when facing cutter 1 adds man-hour from downside toward high side along the equidistant M in P-P direction of vertical facing cutter high point position and low dot location line, next cutter raises N accordingly than a upper cutter main shaft；Otherwise, when adding man-hour from high side toward downside, next cutter reduces N accordingly than a upper cutter main shaft, processes successively；Such cutter rail arranges point-blank along facing cutter 1 high point position and low dot location line section view, thus can be processed by pedestal plate by angle of inclination, it is possible to eliminate the generation connecing tool marks, stands up rear same method processing opposite side plane.By the processing method of the present invention, solve million nuclear steam turbine pedestal board plane polish difficult points, it is ensured that flatness and surface quality requirements after million nuclear steam turbine pedestal processing have reached technology requirement.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; it is equal to replacement according to technical scheme and inventive concept thereof or is changed, all should be encompassed within protection scope of the present invention.
Claims (5)
1. a nuclear steam turbine pedestal plate finish-milling processing method, it is characterised in that comprise the steps:
Step one, installing on machine tool chief axis by facing cutter, place one piece of dial gauge on platen, upwards, gauge outfit is pointed at the center that will not install the facing cutter of blade to gauge outfit；
Step 2, facing cutter is walked to the position from R place, facing cutter center along X-axis, wherein, R is the cutter hub inside radius of facing cutter, by circular interpolation make facing cutter walk when not rotating full circle track that radius is R, it is determined that high point position on the circumferencial direction of facing cutter and low dot location；
Step 3, by high point position, low dot location respectively with the difference record from R place, facing cutter center, calculated the angle angle of high point position and low dot location and X-axis by coordinate position；
Step 4, dial gauge is placed individually on high point position and low dot location, rotary milling tools dish, if dial gauge registration is constant, namely can be identified as facing cutter；
Step 5, from facing cutter center R+a and the R+b position located, respectively repeat steps two and step 3 record difference, when repeating step 2 and step 3, it is that R is replaced to respectively R+a and R+b, wherein, a, b are constant, and R+a and R+b is respectively less than equal to milling cutter diameter, and being directly proportional to cutter hub inside radius R by three groups of data difference calculates the difference of the high point position after loading onto blade and low dot location；
Step 6, by pedestal board placing on lathe, the centrage of pedestal plate is parallel with the high point position of facing cutter and low dot location line, facing cutter is loaded onto after blade at the direction linearly track of vertical high point position and low dot location line gang milling two cutter, in the difference range whether the high point position of verification machined surface and the difference of low dot location calculate in step 5, if in scope, continue following step；If not in scope, repeat step one to step 5；
Step 7, mapping out every cutter spacing M on pedestal plate, calculate the difference of height N of spacing M, difference of height N=(M/D) * X, X are the difference of the high point position of facing cutter and low dot location, and D is milling cutter diameter；
Machining locus is arrange along some parallel straight line orbits of vertical facing cutter high point position and the equidistant M in low dot location line direction, when facing cutter adds man-hour from downside toward high side along vertical facing cutter high point position and the equidistant M in low dot location line direction, next cutter raises N accordingly than a upper cutter main shaft；Otherwise, when adding man-hour from high side toward downside, next cutter reduces N accordingly than a upper cutter main shaft, processes successively；
Step 8, repetition step one process the another side of pedestal plate to step 7.
2. million nuclear steam turbine pedestal plate finish-milling processing methods according to claim 1, it is characterised in that: in step 5, the difference of the high point position and low dot location of loading onto the facing cutter after blade can adopt laser detector directly to measure.
3. million nuclear steam turbine pedestal plate finish-milling processing methods according to claim 1, it is characterized in that: in step 7, when cutter step occur connecing in two cutter rail joints on machined surface, use cushion block that with low dot location line direction, pedestal plate is adjusted the height parallel with facing cutter along the high point position of facing cutter.
4. million nuclear steam turbine pedestal plate finish-milling processing methods according to claim 3, it is characterised in that: the height H of cushion block meets: H=(L/D) * X, wherein, L is the distance in the pedestal plate high point position along facing cutter and low dot location line direction.
5. million nuclear steam turbine pedestal plate finish-milling processing methods according to claim 1, it is characterised in that: the selection range of milling cutter diameter D is at 200～600mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410180815.2A CN104107943B (en) | 2014-04-28 | 2014-04-28 | Million nuclear steam turbine pedestal plate finish-milling processing methods |
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| CN201410180815.2A CN104107943B (en) | 2014-04-28 | 2014-04-28 | Million nuclear steam turbine pedestal plate finish-milling processing methods |
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| CN104107943A CN104107943A (en) | 2014-10-22 |
| CN104107943B true CN104107943B (en) | 2016-07-06 |
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| CN109352043B (en) * | 2018-11-15 | 2020-08-18 | 浙江坤博精工科技股份有限公司 | Machining process for eliminating section difference in plane milling process when equipment has positioning error |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2261829A1 (en) * | 1973-01-02 | 1975-09-19 | Gladwin Floyd Ralph | |
| CN102581549A (en) * | 2012-03-21 | 2012-07-18 | 无锡圣贝尔机电有限公司 | Process for fabricating wind-driven generator base |
| CN102809344A (en) * | 2012-08-08 | 2012-12-05 | 安徽博微长安电子有限公司 | Online detecting method for profile tolerance of curve |
| CN103737088A (en) * | 2013-12-13 | 2014-04-23 | 陕西宝成航空仪表有限责任公司 | Precision processing method for symmetric key grooves on shaft |
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2014
- 2014-04-28 CN CN201410180815.2A patent/CN104107943B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2261829A1 (en) * | 1973-01-02 | 1975-09-19 | Gladwin Floyd Ralph | |
| CN102581549A (en) * | 2012-03-21 | 2012-07-18 | 无锡圣贝尔机电有限公司 | Process for fabricating wind-driven generator base |
| CN102809344A (en) * | 2012-08-08 | 2012-12-05 | 安徽博微长安电子有限公司 | Online detecting method for profile tolerance of curve |
| CN103737088A (en) * | 2013-12-13 | 2014-04-23 | 陕西宝成航空仪表有限责任公司 | Precision processing method for symmetric key grooves on shaft |
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Effective date of registration: 20221221 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |
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