CN102303208A - Method for processing T-shaped groove of nozzle chamber of cylinder of steam turbine - Google Patents
Method for processing T-shaped groove of nozzle chamber of cylinder of steam turbine Download PDFInfo
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- CN102303208A CN102303208A CN201110241856A CN201110241856A CN102303208A CN 102303208 A CN102303208 A CN 102303208A CN 201110241856 A CN201110241856 A CN 201110241856A CN 201110241856 A CN201110241856 A CN 201110241856A CN 102303208 A CN102303208 A CN 102303208A
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Abstract
The invention discloses a method for processing a T-shaped groove of a nozzle chamber of a cylinder of a steam turbine, relates to a processing method of the T-shaped groove, and solves the problems that the rigidity of a tool in the processing process of the conventional T-shaped groove of the nozzle chamber of the cylinder of the steam turbine is reduced to cause low processing accuracy and poor quality and an operator cannot install a connecting long knife gang in place when the diameters of two ends of the cylinder are only 250 to 350 mm to directly cause stopping of processing. The method comprises the following steps of: 1, before processing, preparing, namely clamping the two ends of upper and lower halves of the cylinder on a numerically-controlled planer type milling machine in the same direction at the same time, determining numerical control zero points, uniformizing the processing allowance of a blank, and processing all holes in a split surface; 2, processing all opening gears in the cylinder; 3, processing a vertical groove; and 4, processing the T-shaped groove. The method is applicable to processing of the T-shaped groove of the nozzle chamber of the cylinder.
Description
Technical field
The present invention relates to a kind of processing method of T type groove, be specifically related to the processing method of a kind of steam turbine T of nozzle box type groove, belong to field of machining.
Background technology
The turbine high-pressure cylinder internal is made up of each grade circle, and each grade circular diameter is big in the middle of being characterized in, the two ends diameter is little, and the cylinder body overall length is long, traditional processing mode be with cylinder narrow up and down and the back tightly, the employing vertical lathe is holded up processing with cylinder body.Sometimes cylinder internal has been installed and has been had T type nozzle slot chamber, and common T type groove adopts the turning mode to process basically and can meet the demands.Along with the energy source and power technical development needs; The cylinder that a kind of T of having type nozzle slot chamber occurred; Such groove must be used the processing of L type lathe tool; Because the diameter of T type groove is at 700mm-800mm, this just makes the rigidity of cutter reduce, and causes machining accuracy low; Of poor quality; And cylinder body two ends diameter is when having only 250mm-350mm, and the operator can't be in place the spreading blade row, directly causes processing to carry out.
Summary of the invention
The objective of the invention is to reduce for the rigidity that solves the existing T of steam turbine nozzle box type groove cutter in process; Cause machining accuracy low; Of poor quality; And cylinder body two ends diameter is when having only 250mm-350mm; The operator can't be in place the spreading blade row; Directly cause processing the problem that to carry out, and then the processing method of a kind of steam turbine T of nozzle box type groove is provided.
Technical scheme of the present invention is: the detailed process of the processing method of the T of steam turbine nozzle box type groove is following:
Step 1: the preparation before the processing: with on the cylinder second two ends according to same direction simultaneously clamping on CNC planer type milling machine, at first confirm numerical control zero point, the even allowance of blank, each hole on the processing split;
Step 2: processing each in cylinder opened shelves: respectively open the shelves circle and adopt right-angle milling head on the CNC planer type milling machine to connect three sword dish milling cutters to carry out roughing; Rough machined concrete parameter is: three angle of throat dish diameters are Φ 500mm; Rotating speed is 100r/min-120r/min; Feed rate is 700mm/min-900mm/min; The single face surplus is 1mm; After roughing is accomplished; Adopt the fine finishining blade to carry out fine finishining; Accurately machined concrete parameter is: three angle of throat dish diameters are Φ 500mm; Rotating speed is 100r/min-120r/min, and feed rate is 950mm/min-1100mm/min;
Step 3: the perpendicular type groove of processing: on CNC planer type milling machine, select right-angle milling head to connect slotting cutter; Adopt maize milling cutter to rough mill perpendicular type groove; The concrete parameter of rough milling is: the diameter of maize milling cutter is Φ 40mm; Rotating speed is 300r/min-340r/min; Feed rate is 290mm/min-310mm/min; The single face surplus is 1mm; After rough milling completion; Adopt the perpendicular type groove of cylindrical bar milling cutter finish-milling to accomplish the finish-milling processing of perpendicular type groove; The concrete parameter of finish-milling is: the diameter of cylindrical bar milling cutter is Φ 40mm; Rotating speed is 110r/min-130r/min, and feed rate is 70mm/min-90mm/min;
Step 4: level of processing hole: after accomplishing the finish-milling of perpendicular type groove; Adopt the carbide alloy T-slot cutter to rough mill lateral aperture; The concrete parameter of rough milling is: milling cutter is Φ 63X10mm; Rotating speed is 290r/min-310r/min; Feed rate is 90mm/min-110mm/min; After rough milling completion; Adopt face and side cutter finish-milling T type groove; The concrete parameter of finish-milling is: face and side cutter is Φ 80X10mm; Rotating speed is 390r/min-410r/min; Feed rate is 110mm/min-130mm/min; After finish-milling is accomplished; Facing head is installed on the right-angle milling head; Boring cutter bar is installed on the facing head; And boring cutter bar transferred to the center of lateral aperture; Boring cutter is installed on the boring cutter bar; The heavy boring lateral aperture; The concrete parameter of heavy boring is: the facing head rotating speed is 28r/min-32r/min; Feed rate is 28mm/min-32mm/min, the right boring lateral aperture, and the concrete parameter of right boring is: the facing head rotating speed is 23r/min-27r/min; Feed rate is 32mm/min-37mm/min; Right boring is accomplished the back lateral aperture and is connected with perpendicular type groove, forms T type groove, and then the processing of the T type groove that nothing is ground one's teeth behind the cylinder is closed in completion.
The present invention compared with prior art has following effect: 1. the T type groove machining accuracy that processes of the present invention is high, the problem of effectively having avoided T type groove directly to process.2. the present invention has effectively guaranteed second symmetry on the cylinder, has avoided vertical size in the man-hour generation partly that adds, and horizontal clamping processing is consistent with Installation and Debugging and duty, also avoids gravity deformation unnecessary in the process, has guaranteed machining accuracy.
The specific embodiment
The specific embodiment one: the detailed process of the processing method of the T of the steam turbine nozzle box type groove of this embodiment is following:
Step 1: the preparation before the processing: with on the cylinder second two ends according to same direction simultaneously clamping on CNC planer type milling machine, at first confirm numerical control zero point, the even allowance of blank, each hole on the processing split;
Step 2: processing each in cylinder opened shelves: respectively open the shelves circle and adopt right-angle milling head on the CNC planer type milling machine to connect three sword dish milling cutters to carry out roughing; Rough machined concrete parameter is: three angle of throat dish diameters are Φ 500mm; Rotating speed is 100r/min-120r/min; Feed rate is 700mm/min-900mm/min; The single face surplus is 1mm; After roughing is accomplished; Adopt the fine finishining blade to carry out fine finishining; Accurately machined concrete parameter is: three angle of throat dish diameters are Φ 500mm; Rotating speed is 100r/min-120r/min, and feed rate is 950mm/min-1100mm/min;
Step 3: the perpendicular type groove of processing: on CNC planer type milling machine, select right-angle milling head to connect slotting cutter; Adopt maize milling cutter to rough mill perpendicular type groove; The concrete parameter of rough milling is: the diameter of maize milling cutter is Φ 40mm; Rotating speed is 300r/min-340r/min; Feed rate is 290mm/min-310mm/min; The single face surplus is 1mm; After rough milling completion; Adopt the perpendicular type groove of cylindrical bar milling cutter finish-milling to accomplish the finish-milling processing of perpendicular type groove; The concrete parameter of finish-milling is: the diameter of cylindrical bar milling cutter is Φ 40mm; Rotating speed is 110r/min-130r/min, and feed rate is 70mm/min-90mm/min;
Step 4: level of processing hole: after accomplishing the finish-milling of perpendicular type groove; Adopt the carbide alloy T-slot cutter to rough mill lateral aperture; The concrete parameter of rough milling is: milling cutter is Φ 63X10mm; Rotating speed is 290r/min-310r/min; Feed rate is 90mm/min-110mm/min; After rough milling completion; Adopt face and side cutter finish-milling T type groove; The concrete parameter of finish-milling is: face and side cutter is Φ 80X10mm; Rotating speed is 390r/min-410r/min; Feed rate is 110mm/min-130mm/min; After finish-milling is accomplished; Facing head is installed on the right-angle milling head; Boring cutter bar is installed on the facing head; And boring cutter bar transferred to the center of lateral aperture; Boring cutter is installed on the boring cutter bar; The heavy boring lateral aperture; The concrete parameter of heavy boring is: the facing head rotating speed is 28r/min-32r/min; Feed rate is 28mm/min-32mm/min, the right boring lateral aperture, and the concrete parameter of right boring is: the facing head rotating speed is 23r/min-27r/min; Feed rate is 32mm/min-37mm/min; Right boring is accomplished the back lateral aperture and is connected with perpendicular type groove, forms T type groove, and then the processing of the T type groove that nothing is ground one's teeth behind the cylinder is closed in completion.
The specific embodiment two: the boring cutter in the step 4 of this embodiment is a L type elbow boring cutter.So be provided with, be convenient to the processing of lateral aperture.Other composition is identical with the specific embodiment one with annexation.
Claims (2)
1. the processing method of the T of a steam turbine nozzle box type groove, it is characterized in that: the detailed process of the processing method of the said steam turbine T of nozzle box type groove is following:
Step 1: the preparation before the processing: with on the cylinder second two ends according to same direction simultaneously clamping on CNC planer type milling machine, at first confirm numerical control zero point, the even allowance of blank, each hole on the processing split;
Step 2: processing each in cylinder opened shelves: respectively open the shelves circle and adopt right-angle milling head on the CNC planer type milling machine to connect three sword dish milling cutters to carry out roughing; Rough machined concrete parameter is: three angle of throat dish diameters are Φ 500mm; Rotating speed is 100r/min-120r/min; Feed rate is 700mm/min-900mm/min; The single face surplus is 1mm; After roughing is accomplished; Adopt the fine finishining blade to carry out fine finishining; Accurately machined concrete parameter is: three angle of throat dish diameters are Φ 500mm; Rotating speed is 100r/min-120r/min, and feed rate is 950mm/min-1100mm/min;
Step 3: the perpendicular type groove of processing: on CNC planer type milling machine, select right-angle milling head to connect slotting cutter; Adopt maize milling cutter to rough mill perpendicular type groove; The concrete parameter of rough milling is: the diameter of maize milling cutter is Φ 40mm; Rotating speed is 300r/min-340r/min; Feed rate is 290mm/min-310mm/min; The single face surplus is 1mm; After rough milling completion; Adopt the perpendicular type groove of cylindrical bar milling cutter finish-milling to accomplish the finish-milling processing of perpendicular type groove; The concrete parameter of finish-milling is: the diameter of cylindrical bar milling cutter is Φ 40mm; Rotating speed is 110r/min-130r/min, and feed rate is 70mm/min-90mm/min;
Step 4: level of processing hole: after accomplishing the finish-milling of perpendicular type groove; Adopt the carbide alloy T-slot cutter to rough mill lateral aperture; The concrete parameter of rough milling is: milling cutter is Φ 63X10mm; Rotating speed is 290r/min-310r/min; Feed rate is 90mm/min-110mm/min; After rough milling completion; Adopt face and side cutter finish-milling T type groove; The concrete parameter of finish-milling is: face and side cutter is Φ 80X10mm; Rotating speed is 390r/min-410r/min; Feed rate is 110mm/min-130mm/min; After finish-milling is accomplished; Facing head is installed on the right-angle milling head; Boring cutter bar is installed on the facing head; And boring cutter bar transferred to the center of lateral aperture; Boring cutter is installed on the boring cutter bar; The heavy boring lateral aperture; The concrete parameter of heavy boring is: the facing head rotating speed is 28r/min-32r/min; Feed rate is 28mm/min-32mm/min, the right boring lateral aperture, and the concrete parameter of right boring is: the facing head rotating speed is 23r/min-27r/min; Feed rate is 32mm/min-37mm/min; Right boring is accomplished the back lateral aperture and is connected with perpendicular type groove, forms T type groove, and then the processing of the T type groove that nothing is ground one's teeth behind the cylinder is closed in completion.
2. according to the processing method of the said steam turbine of claim 1 T of nozzle box type groove, it is characterized in that: the boring cutter in the step 4 is a L type elbow boring cutter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110241856 CN102303208B (en) | 2011-08-22 | 2011-08-22 | Method for processing T-shaped groove of nozzle chamber of cylinder of steam turbine |
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| CN 201110241856 CN102303208B (en) | 2011-08-22 | 2011-08-22 | Method for processing T-shaped groove of nozzle chamber of cylinder of steam turbine |
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| CN102303208B CN102303208B (en) | 2013-01-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345397A (en) * | 2015-12-23 | 2016-02-24 | 常熟市淼泉压缩机配件有限公司 | Method for efficient batch processing of parts with holes |
| CN105665801A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Method for machining 90-degree inner hole sealing groove fully automatically through numerical-control milling machine |
| CN107695634A (en) * | 2017-11-23 | 2018-02-16 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of Thin-Wall Outer Casing T-slot processing method |
| CN108608162A (en) * | 2018-06-26 | 2018-10-02 | 沈阳透平机械股份有限公司 | A kind of processing method of the closed guide vane of centrifugal compressor inner casing |
| CN109773409A (en) * | 2019-01-23 | 2019-05-21 | 江苏神通阀门股份有限公司 | A kind of process improving C-shaped ring matching surface machining accuracy |
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| JPS61236413A (en) * | 1985-04-11 | 1986-10-21 | Kobe Steel Ltd | Cutting method for pitch groove in rolling roll of deformed bar steel |
| CN200963706Y (en) * | 2006-11-09 | 2007-10-24 | 哈尔滨汽轮机厂有限责任公司 | Slotter for modifying steam turbine cylinder in situ |
| CN101745672A (en) * | 2009-12-21 | 2010-06-23 | 东方电气集团东方汽轮机有限公司 | Method for processing slots on turbine rotor for mushroom-shaped blade roots |
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2011
- 2011-08-22 CN CN 201110241856 patent/CN102303208B/en active Active
Patent Citations (3)
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| JPS61236413A (en) * | 1985-04-11 | 1986-10-21 | Kobe Steel Ltd | Cutting method for pitch groove in rolling roll of deformed bar steel |
| CN200963706Y (en) * | 2006-11-09 | 2007-10-24 | 哈尔滨汽轮机厂有限责任公司 | Slotter for modifying steam turbine cylinder in situ |
| CN101745672A (en) * | 2009-12-21 | 2010-06-23 | 东方电气集团东方汽轮机有限公司 | Method for processing slots on turbine rotor for mushroom-shaped blade roots |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105665801A (en) * | 2014-11-17 | 2016-06-15 | 昌河飞机工业（集团）有限责任公司 | Method for machining 90-degree inner hole sealing groove fully automatically through numerical-control milling machine |
| CN105665801B (en) * | 2014-11-17 | 2018-03-13 | 昌河飞机工业（集团）有限责任公司 | The method of number milling machine tool 90 ° of endoporus seal grooves of full-automatic processing |
| CN105345397A (en) * | 2015-12-23 | 2016-02-24 | 常熟市淼泉压缩机配件有限公司 | Method for efficient batch processing of parts with holes |
| CN107695634A (en) * | 2017-11-23 | 2018-02-16 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of Thin-Wall Outer Casing T-slot processing method |
| CN108608162A (en) * | 2018-06-26 | 2018-10-02 | 沈阳透平机械股份有限公司 | A kind of processing method of the closed guide vane of centrifugal compressor inner casing |
| CN109773409A (en) * | 2019-01-23 | 2019-05-21 | 江苏神通阀门股份有限公司 | A kind of process improving C-shaped ring matching surface machining accuracy |
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