CN102059515A - Method for machining sealing tile - Google Patents
Method for machining sealing tile Download PDFInfo
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- CN102059515A CN102059515A CN 201010556919 CN201010556919A CN102059515A CN 102059515 A CN102059515 A CN 102059515A CN 201010556919 CN201010556919 CN 201010556919 CN 201010556919 A CN201010556919 A CN 201010556919A CN 102059515 A CN102059515 A CN 102059515A
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- sealing tile
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- machining
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Abstract
The invention discloses a method for machining a sealing tile, solving the problems that the integral machining precision of the sealing tile is hard to be guaranteed and the machining thermal deformation is big in the traditional method for machining the sealing tile. The method disclosed by the invention comprises the following steps of: carrying out forging change on aluminium bronze to obtain four sealing tile embryo membranes; heating the four sealing tile embryo membranes at the temperature of 780-840DEG C for 2-3 hours and slowly cooling to room temperature with respect to the furnace; roughly machining two end surfaces of each sealing tile embryo membrane; leaving a machining allowance of 2mm on one surface; sequentially overlaying the four sealing tile embryo membranes; simultaneously machining the chord lengths of the four sealing tiles according to the excircle of phi 630mm; aligning the splits of the four sealing tile embryo membranes; and carrying out spot welding on the side surfaces of two ends of the four sealing tile embryo membranes so that the four sealing tiles are integrated into a whole. The method for machining the sealing tile is characterized in that the four tiles are simultaneously machined, which guarantees the integral machining precision of the sealing tile, and the machining thermal deformation is effectively reduced by controlling a machining parameter and an annealing mode.
Description
Technical field
The present invention relates to a kind of method of processing sealing bearing bush.
Background technology
Sealing bearing bush is to be used to seal turbine rotor axially and the parts of radial seal, and sealing bearing bush is the torus that is fitted together by four identical sealing tile fragments.The sealing bearing bush of four sealing tile fragments assembling, require the depth of parallelism less than 0.02mm, internal diameter size is Φ 590+0.021mm, external diameter is Φ 620 ± 0.01mm, gross thickness is 21mm, one end face has the 3mm shoulder, shoulder is of a size of Φ 590, the ring shaped slot that R1.5 is arranged on the step surface, form and position tolerance are vertical endoporus 0.01mm, parallel end faces 0.01mm, four sealing tile fragments require the horizontal plane of split, vertical split guarantees that dimensional tolerance is 0～0.02mm, four sealing tile fragment split gaps are 0～0.02mm, guarantee henry chloranthus herb piece consistent size, horizontal flange, vertical centering control divides in the face of claiming.
Because Geometrical Tolerance Principle is too tight, machining deformation directly influences dimensional accuracy, and the method for existing processing sealing bearing bush has the following disadvantages: one, process four sealing tile fragments separately, be difficult to guarantee the whole machining accuracy of sealing bearing bush; Two, the material of sealing bearing bush is an aluminium bronze, and the processing thermal deformation is big.
Summary of the invention
The present invention is difficult to guarantee the whole machining accuracy and the big problem of processing thermal deformation of sealing bearing bush for the method that solves existing processing sealing bearing bush, and then proposes a kind of method of processing sealing bearing bush.
The present invention solves the problems of the technologies described above the technical scheme of taking to be:
The method of processing sealing bearing bush of the present invention realizes according to following steps:
Step 1, aluminium bronze is changed forging, obtain four sealing tile fragment fetal membranes, four sealing tile fragment fetal membranes are heated, the temperature of heating is 780 °～840 °, and warm-up time is 2.5 hours, slowly cools to room temperature with stove then;
Two end faces of step 2, each sealing tile fragment fetal membrane of roughing, single face stays allowance 2mm, and four sealing tile fragment fetal membranes are stacked successively, processes the chord length of four sealing tile fragments simultaneously by cylindrical Φ 630mm;
Step 3, with the alignment of four sealing tile fragment fetal membrane splits, the sides, two ends of four sealings of spot welding tile fragment fetal membrane make four sealing tile fragments form one;
Step 4, four of one sealing tile fragments are clamped on the lathe, car endoporus Φ 570mm, turning Φ 626mm, single face stays allowance 3mm, then the weld bond mill opened, equating, the both ends of the surface of each sealing tile fragment of processing on milling machine, single face stays mill amount 0.3mm;
Step 5, utilize built-up jig with four the sealing tile fragments be clamped on the surface grinding machine, the both ends of the surface depth of parallelism that guarantees each sealing tile fragment is in 0.02mm, process the cylindrical and the endoporus of four sealing tile fragments, excircle dimension is Φ 620mm, and endoporus is of a size of Φ 570mm;
Step 6, first tile fragment guaranteed in 0.01mm with jig bore centering cylindrical, flatness on the disk, adopt four alignment pin location, each split is located with two alignment pins, the alignment pin aperture is Φ 10H7, the position dimension of first tile fragment of processing is Φ 616 pitch circles and Φ 584 pitch circles, and chord length is 438.4 ± 0.01;
Step 7, on jig bore processing second tile fragment pitch circle, processing second tile fragment position dimension be Φ 616 pitch circles and Φ 584 pitch circles, chord length is 428.4 ± 0.01;
Step 8, on jig bore the pitch circle of processing griffith woodsorrel herb piece, the position dimension of processing the griffith woodsorrel herb piece is Φ 616 pitch circles and Φ 584, the pitch circle chord length is 428.4 ± 0.01, and pin packed in the pin-and-hole, the inspection opening carpenters square is very little, and pin guarantees vertical, and four sealing tile fragments are installed on the boring machine together the most at last, mill the chord length and the angle of accurate four sealing tile fragments, the machined surface roughness is Ra1.6;
Step 9, four tile fragments are assemblied on the anchor clamps, are installed in finish turning on the lathe then.
The invention has the beneficial effects as follows:
Adopt the method for processing sealing bearing bush of the present invention to adopt four tile fragments to process together, guaranteed the whole machining accuracy of sealing bearing bush, guaranteed four branches such as tile fragment symmetries and 90 ° accurately, qualification rate reaches 100%, has shortened the production cycle; By control machined parameters and annealing way, effectively reduce the thermal deformation of processing.
The specific embodiment
The specific embodiment one: the method for the described processing sealing bearing bush of present embodiment realizes according to following steps:
Step 1, aluminium bronze is changed forging, obtain four sealing tile fragment fetal membranes, four sealing tile fragment fetal membranes are heated, the temperature of heating is 780 °～840 °, and warm-up time is 2.5 hours, slowly cools to room temperature with stove then;
Two end faces of step 2, each sealing tile fragment fetal membrane of roughing, single face stays allowance 2mm, and four sealing tile fragment fetal membranes are stacked successively, processes the chord length of four sealing tile fragments simultaneously by cylindrical Φ 630mm;
Step 3, with the alignment of four sealing tile fragment fetal membrane splits, the sides, two ends of four sealings of spot welding tile fragment fetal membrane make four sealing tile fragments form one;
Step 4, four of one sealing tile fragments are clamped on the lathe, car endoporus Φ 570mm, turning Φ 626mm, single face stays allowance 3mm, then the weld bond mill opened, equating, the both ends of the surface of each sealing tile fragment of processing on milling machine, single face stays mill amount 0.3mm;
Step 5, utilize built-up jig with four the sealing tile fragments be clamped on the surface grinding machine, the both ends of the surface depth of parallelism that guarantees each sealing tile fragment is in 0.02mm, process the cylindrical and the endoporus of four sealing tile fragments, excircle dimension is Φ 620mm, and endoporus is of a size of Φ 570mm;
Step 6, first tile fragment guaranteed in 0.01mm with jig bore centering cylindrical, flatness on the disk, adopt four alignment pin location, each split is located with two alignment pins, the alignment pin aperture is Φ 10H7, the position dimension of first tile fragment of processing is Φ 616 pitch circles and Φ 584 pitch circles, and chord length is 438.4 ± 0.01;
Step 7, on jig bore processing second tile fragment pitch circle, processing second tile fragment position dimension be Φ 616 pitch circles and Φ 584 pitch circles, chord length is 428.4 ± 0.01;
Step 8, on jig bore the pitch circle of processing griffith woodsorrel herb piece, the position dimension of processing the griffith woodsorrel herb piece is Φ 616 pitch circles and Φ 584, the pitch circle chord length is 428.4 ± 0.01, and pin packed in the pin-and-hole, the inspection opening carpenters square is very little, and pin guarantees vertical, and four sealing tile fragments are installed on the boring machine together the most at last, mill the chord length and the angle of accurate four sealing tile fragments, the machined surface roughness is Ra1.6;
Step 9, four tile fragments are assemblied on the anchor clamps, are installed in finish turning on the lathe then.
The specific embodiment two: the temperature of heating in the present embodiment step 1 is 790 °～820 °.Other is identical with the specific embodiment one.
The specific embodiment three: the temperature of heating in the present embodiment step 1 is 800 °～810 °.Other is identical with the specific embodiment two.
The specific embodiment four: warm-up time is 2.5 hours in the present embodiment step 1.Other is identical with the specific embodiment one.
Claims (4)
1. method of processing sealing bearing bush, it is characterized in that: the method for described processing sealing bearing bush realizes according to following steps:
Step 1, aluminium bronze is changed forging, obtain four sealing tile fragment fetal membranes, four sealing tile fragment fetal membranes are heated, the temperature of heating is 780 °～840 °, and warm-up time is 2～3 hours, slowly cools to room temperature with stove then;
Two end faces of step 2, each sealing tile fragment fetal membrane of roughing, single face stays allowance 2mm, and four sealing tile fragment fetal membranes are stacked successively, processes the chord length of four sealing tile fragments simultaneously by cylindrical Φ 630mm;
Step 3, with the alignment of four sealing tile fragment fetal membrane splits, the sides, two ends of four sealings of spot welding tile fragment fetal membrane make four sealing tile fragments form one;
Step 4, four of one sealing tile fragments are clamped on the lathe, car endoporus Φ 570mm, turning Φ 626mm, single face stays allowance 3mm, then the weld bond mill opened, equating, the both ends of the surface of each sealing tile fragment of processing on milling machine, single face stays mill amount 0.3mm;
Step 5, utilize built-up jig with four the sealing tile fragments be clamped on the surface grinding machine, the both ends of the surface depth of parallelism that guarantees each sealing tile fragment is in 0.02mm, process the cylindrical and the endoporus of four sealing tile fragments, excircle dimension is Φ 620mm, and endoporus is of a size of Φ 570mm;
Step 6, first tile fragment guaranteed in 0.01mm with jig bore centering cylindrical, flatness on the disk, adopt four alignment pin location, each split is located with two alignment pins, the alignment pin aperture is Φ 10H7, the position dimension of first tile fragment of processing is Φ 616 pitch circles and Φ 584 pitch circles, and chord length is 438.4 ± 0.01;
Step 7, on jig bore processing second tile fragment pitch circle, processing second tile fragment position dimension be Φ 616 pitch circles and Φ 584 pitch circles, chord length is 428.4 ± 0.01;
Step 8, on jig bore the pitch circle of processing griffith woodsorrel herb piece, the position dimension of processing the griffith woodsorrel herb piece is Φ 616 pitch circles and Φ 584, the pitch circle chord length is 428.4 ± 0.01, and pin packed in the pin-and-hole, the inspection opening carpenters square is very little, and pin guarantees vertical, and four sealing tile fragments are installed on the boring machine together the most at last, mill the chord length and the angle of accurate four sealing tile fragments, the machined surface roughness is Ra1.6;
Step 9, four tile fragments are assemblied on the anchor clamps, are installed in finish turning on the lathe then.
2. a kind of method of processing sealing bearing bush according to claim 1 is characterized in that: the temperature of heating in the step 1 is 790 °～820 °.
3. a kind of method of processing sealing bearing bush according to claim 2 is characterized in that: the temperature of heating in the step 1 is 800 °～810 °.
4. a kind of method of processing sealing bearing bush according to claim 1 is characterized in that: warm-up time is 2.5 hours in the step 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105569190A CN102059515B (en) | 2010-11-24 | 2010-11-24 | Method for machining sealing tile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105569190A CN102059515B (en) | 2010-11-24 | 2010-11-24 | Method for machining sealing tile |
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| CN102059515A true CN102059515A (en) | 2011-05-18 |
| CN102059515B CN102059515B (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105569190A Active CN102059515B (en) | 2010-11-24 | 2010-11-24 | Method for machining sealing tile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744572A (en) * | 2012-07-10 | 2012-10-24 | 哈尔滨汽轮机厂有限责任公司 | Sealing pad machining method |
| CN113427208A (en) * | 2021-06-11 | 2021-09-24 | 中广核核电运营有限公司 | Method for machining sealing bush of nuclear power generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2580747A1 (en) * | 1985-04-22 | 1986-10-24 | Federal Corp | COMPOSITE THRUST BEARING CONSISTING OF A RADIAL THRUST HAS AT LEAST ONE REPORTED AXIAL THRUST |
| CN1757943A (en) * | 2005-09-30 | 2006-04-12 | 中信重型机械公司 | Manufacturing method of coppor alloy shaft bushing for large grinding machine |
| CN101021233A (en) * | 2006-11-02 | 2007-08-22 | 湘潭市岳塘区兴盛液压机械配件加工厂 | Processing technology for deformed tiltable bush |
| CN101275606A (en) * | 2008-01-22 | 2008-10-01 | 重庆跃进机械厂 | Manufacturing process of high-power low-speed diesel shaft bushing |
| CN101275604A (en) * | 2007-03-28 | 2008-10-01 | 上海电气集团上海电机厂有限公司 | Large-sized turbine generator shaft bushing and method for machining bore of shaft bushing |
-
2010
- 2010-11-24 CN CN2010105569190A patent/CN102059515B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2580747A1 (en) * | 1985-04-22 | 1986-10-24 | Federal Corp | COMPOSITE THRUST BEARING CONSISTING OF A RADIAL THRUST HAS AT LEAST ONE REPORTED AXIAL THRUST |
| CN1757943A (en) * | 2005-09-30 | 2006-04-12 | 中信重型机械公司 | Manufacturing method of coppor alloy shaft bushing for large grinding machine |
| CN101021233A (en) * | 2006-11-02 | 2007-08-22 | 湘潭市岳塘区兴盛液压机械配件加工厂 | Processing technology for deformed tiltable bush |
| CN101275604A (en) * | 2007-03-28 | 2008-10-01 | 上海电气集团上海电机厂有限公司 | Large-sized turbine generator shaft bushing and method for machining bore of shaft bushing |
| CN101275606A (en) * | 2008-01-22 | 2008-10-01 | 重庆跃进机械厂 | Manufacturing process of high-power low-speed diesel shaft bushing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744572A (en) * | 2012-07-10 | 2012-10-24 | 哈尔滨汽轮机厂有限责任公司 | Sealing pad machining method |
| CN113427208A (en) * | 2021-06-11 | 2021-09-24 | 中广核核电运营有限公司 | Method for machining sealing bush of nuclear power generator |
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| Publication number | Publication date |
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| CN102059515B (en) | 2012-05-02 |
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