CN103182622B - The rough machining method of steam turbine cylinder foundry goods - Google Patents
The rough machining method of steam turbine cylinder foundry goods Download PDFInfo
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- CN103182622B CN103182622B CN201110445971.3A CN201110445971A CN103182622B CN 103182622 B CN103182622 B CN 103182622B CN 201110445971 A CN201110445971 A CN 201110445971A CN 103182622 B CN103182622 B CN 103182622B
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Abstract
The invention discloses a kind of rough machining method of steam turbine cylinder foundry goods, be that length is not less than 4000mm for processing overall dimensions, diameter is not less than 2000mm, and radius is not less than the steam turbine cylinder of 1000mm, comprises the following steps: the first step, line; Second step, rough mills; 3rd step, gantry mill; 4th step, heavy boring abdominal cavity; Operation one, employing Set and Positioning frock, locate clamping workpiece; Operation two, according to fine finishining benchmark, adopt rough boring cutter rough mill Intraabdominal each step surface; 5th step, heavy boring cylindrical.The present invention can realize replacing numerical control device with machine tool, completes the roughing of steam turbine cylinder foundry goods.The present invention can realize the mass production of steam turbine cylinder foundry goods.The present invention, without the need to using rare Digit Control Machine Tool, can reduce energy loss, reduces processing cost.
Description
Technical field
The present invention relates to a kind of rough machining method of heavy casting and forging, be specifically related to a kind of rough machining method of steam turbine cylinder foundry goods.
Background technology
Heavy casting and forging is national major technologies and equipment and the necessary important foundation part of key project construction, and the manufacturing capacity of heavy casting and forging and manufacture level directly decide the manufacturing capability and qualification of national major technologies and equipment.
Along with the swift and violent growth of power demand, also more and more higher to the requirement of generating equipment ability, gigawatt and above large power generating equipment are built just gradually and put into effect.Large-sized civil cylinder block casting is mainly used in the critical component of generating equipment---steam turbine part, its critical piece to comprise on High-and-medium Pressure Outer Casing second, on High-and-medium Pressure Outer Casing admission end, IP inner casing second.Wherein, what High-and-medium Pressure Outer Casing partly adopted up and down mostly is low alloy steel castings; What High-and-medium Pressure Outer Casing admission end and IP inner casing partly adopted up and down mostly is stainless cast steel part.
There is multiple step surface that need process in cylinder interior to typical split formula steam turbine cylinder (namely cylinder body forms a complete circular cylinder body by two lobes of symmetry) as shown in Figure 1, the abdominal cavity complex structure of cylinder body.
There is following problem in the processing of steam turbine cylinder:
1, the tonnage of steam turbine cylinder is comparatively large, and generally more than 30 tons, the size of length, generally at 3000mm × 1500mm × more than 1500mm, must be processed on large-scale planer-type milling machine or boring machine;
2, steam turbine cylinder is made up of upper second, and cavity structure in cylinder body is complicated, and the horizontal flange of cylinder body has the allowance of 3 ~ 5mm, and therefore, steam turbine cylinder can not Combined machining;
3, there are admission much not of uniform size, venthole cylindrical in the outside of steam turbine cylinder, and welding lug cylindrical, therefore, can only Digit Control Machine Tool be adopted, process Intraabdominal cascaded surface and cylindrical by numerical control programming at planer-type milling machine metal saw or face and side cutter.
But steam turbine cylinder only requires that roughing is delivered goods, adopt Digit Control Machine Tool processing to increase production cost, human and material resources can drop into very large, cannot be used for manufacture in enormous quantities.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of rough machining method of steam turbine cylinder foundry goods, and it can complete the roughing of steam turbine cylinder foundry goods on machine tool.
For solving the problems of the technologies described above, the technical solution of the rough machining method of steam turbine cylinder foundry goods of the present invention is:
Be that length is not less than 4000mm for processing overall dimensions, diameter is not less than 2000mm, and radius is not less than the steam turbine cylinder of 1000mm, comprises the following steps:
The first step, line;
Second step, rough mills;
Stay 2 ~ 3mm surplus, milling horizontal flange, as fine finishining benchmark;
3rd step, gantry mill;
Adopt planer-type milling machine, according to fine finishining benchmark, the end face of each air admission hole of finish-milling, finish-milling horizontal flange, mills out two stomidiums, makes size reach drawing requirement at cylinder body two ends;
The allowance control of described gantry mill is within 0.1mm, and surface roughness reaches Ra3.2.
4th step, heavy boring abdominal cavity;
Operation one, employing Set and Positioning frock, locate clamping workpiece;
Described Set and Positioning frock comprises support set frock and supporting seat frock;
Support set frock comprises half-turn, lower branch, and upper half-turn, lower branch form an annular frock, and the external diameter of annular frock and the stomidium diameter compatible at workpiece two ends of upper and lower half-turn composition close;
Supporting seat frock comprises base, curved support frame, and curved support frame realizes supporting by base; The internal diameter of curved support frame matches with the external diameter of annular frock.
The method of clamping workpiece location is:
Make the abdominal cavity of workpiece downward, in the stomidium at workpiece two ends, place a support set frock respectively, the stomidium of workpiece is contacted with the upper half-turn of support set frock;
Support set frock is positioned in supporting seat frock, the lower branch of support set frock and the curved support bridge joint of supporting seat frock are touched;
The two ends of workpiece realize clamping respectively by a set of support set and supporting seat frock;
Operation two, according to fine finishining benchmark, adopt rough boring cutter rough mill Intraabdominal each step surface;
5th step, heavy boring cylindrical;
Adopt cylindrical heavy boring cutter, cylindrical heavy boring cutter is installed on boring machine, the periphery of each air inlet of heavy boring workpiece.
Described cylindrical heavy boring cutter comprises cylindrical heavy boring blade row, cylindrical shoulder pole boring row, transition boring cutter row;
Boring cutter fixed mount is drawn together in the package of cylindrical rough boring cutter, and one end of boring cutter fixed mount is stiff end, and the other end is link; The stiff end of boring cutter fixed mount connects rough boring cutter, and the link of boring cutter fixed mount is connected with cylindrical shoulder pole boring row;
Cylindrical shoulder pole boring row is provided with link slot, and the length of link slot is greater than the length of the link of boring cutter fixed mount; Cylindrical heavy boring blade row is connected with cylindrical shoulder pole boring row by link; Cylindrical heavy boring blade row can along the length direction of link slot, relative to the translation of cylindrical shoulder pole boring row; Cylindrical shoulder pole boring row is fixedly installed on transition boring cutter row;
Transition boring cutter row is provided with the holddown groove matched with cylindrical shoulder pole boring row, cylindrical shoulder pole boring row is fixedly installed in the holddown groove of transition boring cutter row.
The technique effect that the present invention can reach is:
The present invention can realize replacing numerical control device with machine tool, completes the roughing of steam turbine cylinder foundry goods.
The present invention can realize the mass production of steam turbine cylinder foundry goods.
The present invention, without the need to using rare Digit Control Machine Tool, can reduce energy loss, reduces processing cost.
The present invention can reduce the time that each part stops at lathe, greatly shortens man-hour, boosts productivity nearly 10 times.
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 typical split formula steam turbine cylinder;
Fig. 2 is the structural representation of support set frock of the present invention;
Fig. 3 is the structural representation of supporting seat frock of the present invention;
Fig. 4 is the structural representation of cylindrical heavy boring blade row of the present invention;
Fig. 5 is the structural representation of cylindrical shoulder pole boring row of the present invention;
Fig. 6 is the structural representation of transition boring cutter row of the present invention.
Description of reference numerals in figure:
1 is upper half-turn, and 2 is connecting bolt,
3 is lower branch, and 11 is base,
12 is bracing frame, and 21 is boring cutter fixed mount,
22 is link, and 23 is stiff end,
31 is link slot, and 41 is holddown groove.
Detailed description of the invention
The rough machining method of steam turbine cylinder foundry goods of the present invention, for processing steam turbine cylinder as shown in Figure 1, the overall dimensions of steam turbine cylinder are that length is not less than 4000mm, and diameter is not less than 2000mm, and radius is not less than 1000mm; Comprise the following steps:
The first step, line;
Workpiece marks the position of center line of all processing diameters and plane, marks horizontal flange line, as roughing benchmark;
Second step, rough mills;
Stay 2 ~ 3mm surplus, milling horizontal flange, as fine finishining benchmark;
3rd step, gantry mill;
Adopt planer-type milling machine, according to fine finishining benchmark, the end face of each air admission hole of finish-milling, finish-milling horizontal flange, two stomidiums (stomidium is semicircle orifice) are milled out at cylinder body two ends with metal saw or face and side cutter, make size reach drawing requirement, allowance control is within 0.1mm, and surface roughness reaches Ra3.2;
4th step, heavy boring abdominal cavity;
Operation one, employing Set and Positioning frock, locate clamping workpiece;
Set and Positioning frock comprises support set frock as shown in Figure 2 and supporting seat frock as shown in Figure 3;
Support set frock comprises half-turn 1, lower branch 3, and upper half-turn 1, lower branch 3 form an annular frock, and upper half-turn 1 realizes being connected by connecting bolt 2 with lower branch 3;
The external diameter of annular frock that upper and lower half-turn 1,3 forms and the stomidium diameter compatible at workpiece two ends close;
Supporting seat frock comprises base 11, curved support frame 12, and curved support frame 12 realizes supporting by base 11; The internal diameter of curved support frame 12 matches with the external diameter of annular frock;
The method of clamping workpiece location is:
Make the abdominal cavity of workpiece downward, in the stomidium at workpiece two ends, place a support set frock respectively, the stomidium of workpiece is contacted with the upper half-turn 1 of support set frock;
Support set frock is positioned in supporting seat frock, the lower branch 3 of support set frock is contacted with the curved support frame 12 of supporting seat frock;
The two ends of workpiece realize clamping respectively by a set of support set and supporting seat frock;
Operation two, according to fine finishining benchmark, adopt rough boring cutter rough mill Intraabdominal each step surface;
Set and Positioning frock of the present invention, can shorten the time of Workpiece fixing clamping greatly.
5th step, heavy boring cylindrical;
Adopt cylindrical heavy boring cutter, the periphery of each air inlet of heavy boring workpiece;
Cylindrical heavy boring cutter comprises cylindrical heavy boring blade row, cylindrical shoulder pole boring row, transition boring cutter row;
As shown in Figure 4, boring cutter fixed mount 21 is drawn together in the package of cylindrical rough boring cutter, and one end of boring cutter fixed mount 21 is stiff end 23, and the other end is link 22; The stiff end 23 of boring cutter fixed mount 21 connects rough boring cutter; The link 22 of boring cutter fixed mount 21 is connected with cylindrical shoulder pole boring row;
As shown in Figure 5, cylindrical shoulder pole boring row is provided with link slot 31, the length of link slot 31 is greater than the length of the link 22 of boring cutter fixed mount 21; Cylindrical heavy boring blade row is connected with cylindrical shoulder pole boring row by link 22; Cylindrical heavy boring blade row can along the length direction of link slot 31, relative to the translation of cylindrical shoulder pole boring row; Cylindrical shoulder pole boring row is fixedly installed on transition boring cutter row;
As shown in Figure 6, transition boring cutter row is provided with the holddown groove 41 matched with cylindrical shoulder pole boring row, cylindrical shoulder pole boring row is fixedly installed in the holddown groove 41 of transition boring cutter row;
Be installed on the boring machine of prior art by cylindrical heavy boring cutter, the cylindrical of machining hole and boss, reaches drawing requirement.
Cylindrical heavy boring blade row of the present invention relative to the translation of cylindrical shoulder pole boring row, can make the rough boring cutter be connected with cylindrical heavy boring blade row relative to the translation of cylindrical shoulder pole boring row, thus regulates according to the size of cylindrical, realizes utilizing common Boring machine processing cylindrical.
The present invention adopts cylindrical heavy boring cutter, and solving machine tool can not the problem of processing excircles.
Claims (4)
1. a rough machining method for steam turbine cylinder foundry goods, is characterized in that, be that length is not less than 4000mm for processing overall dimensions, diameter is not less than 2000mm, and radius is not less than the steam turbine cylinder of 1000mm, comprises the following steps:
The first step, line;
Second step, rough mills;
Stay 2 ~ 3mm surplus, milling horizontal flange, as fine finishining benchmark;
3rd step, gantry mill;
Adopt planer-type milling machine, according to fine finishining benchmark, the end face of each air admission hole of finish-milling, finish-milling horizontal flange, mills out two stomidiums, makes size reach drawing requirement at cylinder body two ends;
4th step, heavy boring abdominal cavity;
Operation one, employing Set and Positioning frock, locate clamping workpiece;
The method of clamping workpiece location is:
Make the abdominal cavity of workpiece downward, in the stomidium at workpiece two ends, place a support set frock respectively, the stomidium of workpiece is contacted with the upper half-turn of support set frock;
Support set frock is positioned in supporting seat frock, the lower branch of support set frock and the curved support bridge joint of supporting seat frock are touched;
The two ends of workpiece realize clamping respectively by a set of support set and supporting seat frock;
Operation two, according to fine finishining benchmark, adopt rough boring cutter rough mill Intraabdominal each step surface;
5th step, heavy boring cylindrical;
Adopt cylindrical heavy boring cutter, cylindrical heavy boring cutter is installed on boring machine, the periphery of each air inlet of heavy boring workpiece.
2. the rough machining method of steam turbine cylinder foundry goods according to claim 1, is characterized in that: the allowance control of described 3rd step gantry mill is within 0.1mm, and surface roughness reaches Ra3.2.
3. the rough machining method of steam turbine cylinder foundry goods according to claim 1, is characterized in that: the Set and Positioning frock described in described 4th step operation one comprises support set frock and supporting seat frock;
Support set frock comprises half-turn, lower branch, and upper half-turn, lower branch form an annular frock, and the external diameter of annular frock and the stomidium diameter compatible at workpiece two ends of upper and lower half-turn composition close;
Supporting seat frock comprises base, curved support frame, and curved support frame realizes supporting by base; The internal diameter of curved support frame matches with the external diameter of annular frock.
4. the rough machining method of steam turbine cylinder foundry goods according to claim 1, is characterized in that: the cylindrical heavy boring cutter described in described 5th step comprises cylindrical heavy boring blade row, cylindrical shoulder pole boring row, transition boring cutter row;
Boring cutter fixed mount is drawn together in the package of cylindrical rough boring cutter, and one end of boring cutter fixed mount is stiff end, and the other end is link; The stiff end of boring cutter fixed mount connects rough boring cutter, and the link of boring cutter fixed mount is connected with cylindrical shoulder pole boring row;
Cylindrical shoulder pole boring row is provided with link slot, and the length of link slot is greater than the length of the link of boring cutter fixed mount; Cylindrical heavy boring blade row is connected with cylindrical shoulder pole boring row by link; Cylindrical heavy boring blade row can along the length direction of link slot, relative to the translation of cylindrical shoulder pole boring row; Cylindrical shoulder pole boring row is fixedly installed on transition boring cutter row;
Transition boring cutter row is provided with the holddown groove matched with cylindrical shoulder pole boring row, cylindrical shoulder pole boring row is fixedly installed in the holddown groove of transition boring cutter row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110445971.3A CN103182622B (en) | 2011-12-27 | 2011-12-27 | The rough machining method of steam turbine cylinder foundry goods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110445971.3A CN103182622B (en) | 2011-12-27 | 2011-12-27 | The rough machining method of steam turbine cylinder foundry goods |
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| CN103182622A CN103182622A (en) | 2013-07-03 |
| CN103182622B true CN103182622B (en) | 2016-02-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105921724A (en) * | 2016-04-29 | 2016-09-07 | 共享装备股份有限公司 | Horizontal cylinder assembly supporting device for semicircular cylinder block castings of combustion gas turbine and test method |
| CN109317717A (en) * | 2017-08-01 | 2019-02-12 | 上海电气电站设备有限公司 | Numerical control cylinder boring machine for steam turbine |
| CN109454404B (en) * | 2018-08-30 | 2020-11-24 | 洛阳奇瑞机械科技有限公司 | Machining method for precision casting machine of optical window framework of aerial pod |
| CN110744267B (en) * | 2019-11-14 | 2022-05-24 | 无锡华能热能设备有限公司 | Ring for wind power equipment and machining process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201889450U (en) * | 2010-07-05 | 2011-07-06 | 无锡桥联风电科技有限公司 | Adjustable boring cutter row |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007313595A (en) * | 2006-05-25 | 2007-12-06 | Mitsubishi Heavy Ind Ltd | Positioning pin, and component machining fixture having the same |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201889450U (en) * | 2010-07-05 | 2011-07-06 | 无锡桥联风电科技有限公司 | Adjustable boring cutter row |
Non-Patent Citations (1)
| Title |
|---|
| "600MW机组高中压外缸加工工艺";邹伟文;《东方电气评论》;19990331;第63-71,84页 * |
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Effective date of registration: 20170104 Address after: 200245 Jiangchuan Road, Shanghai, No. 207, building 1800, No. Patentee after: Shanghai Electric Heavy Forging Co. Ltd. Patentee after: Shanghai Heavy-Machine Factory Co., Ltd. Address before: 200245 Jiangchuan Road, Shanghai, No. 1800, No. Patentee before: Shanghai Heavy-Machine Factory Co., Ltd. |