WO2024088032A1 - Machining process for deep hole and groove for temperature measuring element of nuclear main pump sealed chamber - Google Patents

Machining process for deep hole and groove for temperature measuring element of nuclear main pump sealed chamber Download PDF

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Publication number
WO2024088032A1
WO2024088032A1 PCT/CN2023/123314 CN2023123314W WO2024088032A1 WO 2024088032 A1 WO2024088032 A1 WO 2024088032A1 CN 2023123314 W CN2023123314 W CN 2023123314W WO 2024088032 A1 WO2024088032 A1 WO 2024088032A1
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Prior art keywords
temperature measuring
machining center
speed
hole
drill
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PCT/CN2023/123314
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French (fr)
Chinese (zh)
Inventor
于勇
张晨旭
姚淼夫
齐淑尊
黄秀波
王文彬
张韵曾
王均馗
宋亮
杜帆
张傲
曹海文
王桐
李函霖
鲍卫东
任智达
李禛
张璐
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哈尔滨电气动力装备有限公司
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Publication of WO2024088032A1 publication Critical patent/WO2024088032A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D75/00—Reaming machines or reaming devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the invention relates to a processing technology for deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump.
  • the sealing chamber is a key component of the main pump of a nuclear power plant. It has three-level sealing components installed inside, and has extremely high requirements for temperature control and temperature measuring elements. In addition, the interior of the sealing chamber is subjected to high temperature and high pressure, so the processing quality of the deep holes of the temperature measuring elements in the sealing chamber is crucial.
  • the deep hole length of the sealed room temperature measuring element is close to 400mm, with a minimum diameter of 7mm.
  • the roughness requirement for some positions is Ra1.6 ⁇ m, and it is necessary to pass through two levels, which is very easy to damage the processing tool.
  • professional deep hole processing machines are generally used at home and abroad. Even when professional deep hole processing machines are used, it is difficult to meet the requirements of the drawings due to the multi-level processing. It is often the case that the tool on the second level is damaged or is not coaxial with the hole on the first level.
  • professional deep hole processing machines occupy a large area, the machine tool processing method is single, the utilization rate is low, the efficiency is not high, and professional deep hole processing machines are relatively expensive. Ordinary machine tools cannot meet the requirements of nuclear power products in terms of roughness or position when processing deep holes.
  • the slot of the temperature measuring element in the sealed chamber is inclined inwards. Generally, it is processed by a boring machine with an extended tool bar. However, due to the excessive length of the tool bar, chatter marks are generated, which affects the processing quality. It is inclined inward. If an extended tool rod is used to process the inward inclined angle, the tool rod will interfere with the upper part of the sealing chamber. Therefore, the inclination angle of the groove can only be polished by hand, which affects the product processing quality and is difficult to meet the design requirements.
  • the purpose of the present invention is to provide a processing technology for deep holes and grooves of temperature measuring elements in the sealing chamber of a nuclear main pump, which has high processing accuracy, stable drilling method, cost savings, improved machine tool utilization and production capacity, and multiplied processing efficiency.
  • the technical solution of the present invention is a process for processing deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump;
  • An angle head (16) is mounted on a machining center (20), a three-face milling cutter (19) with a diameter of 100 mm is mounted on the angle head (16), and the three-face milling cutter (19) is used to machine the position of the temperature measuring hole (5) on the inner arc surface (2) into a flat surface;
  • a plate drill (8) with a diameter of 30 mm is used on a machining center to pre-machine a temperature measuring hole (5) and two process holes (4) on the outer arc surface (3);
  • a thermal expansion rod (10) is used in a machining center in conjunction with a centering drill (9) with a diameter of 16 mm to penetrate a temperature measuring hole (5) and two process holes (4) on the outer arc surface (3), and a temperature measuring hole (5) and a centering hole of an M20 thread (6) are respectively machined on the inner arc surface (2);
  • a thermal expansion rod (10) is used in conjunction with a stepped drill (11) with a diameter of 7 mm and 14.1 mm to penetrate the temperature measuring hole (5) on the outer arc surface (3) to machine the depth of the temperature measuring hole (5) on the inner arc surface;
  • a heat expansion rod (10) is used in conjunction with a drill (12) with a diameter of 30.4 mm to expand the temperature measuring hole (5);
  • An angle head (16) is mounted on a machining center (20), and a high-speed milling cutter (17) with a diameter of 20 mm is mounted on the angle head (16) to machine a 45 mm wide inclined groove (7);
  • the inverted strip reamer (14) used in step 8) is an integral segmented type.
  • the inverted strip of the inverted strip reamer (14) used in step 8) can play a guiding and supporting role, and at the same time, the holes of the inner arc surface and the outer arc surface are reamed to ensure the coaxiality of the holes.
  • the first step is to use an angle head on the machining center to process the inner arc plane.
  • the interference between the angle head and the workpiece can be prevented, and collisions can be avoided during processing.
  • the centering hole is processed on the inner arc plane to avoid the situation where the inner arc cannot be centered.
  • this process method does not require the purchase of professional deep hole processing machine tools, which saves the cost of purchasing professional deep hole processing machine tools, improves machine tool utilization and production capacity, and thirdly, it multiplies the processing efficiency.
  • Special machine tools can only process deep holes, and cannot process planes and bevel grooves, etc.
  • the plane and the bevel can be clamped in the machining center once to complete all the processing steps.
  • This process method can shorten the processing time by more than half compared with special machine tools.
  • the bevel is processed by the machining center and the angle head instead of manual grinding to complete the processing of the inclination angle of the groove, which greatly improves the product manufacturing efficiency and processing accuracy.
  • This process method is of great significance to the localization of key processes of nuclear main pumps, and has been successfully applied to the "Hualong One" nuclear main pump and many other nuclear main pump projects.
  • the inverted strip reamer used is a customized integral segmented type.
  • the advantages of this reamer are that it can first reduce the processing torque and avoid vibration during processing, thereby affecting the processing quality.
  • the segmented type is convenient for discharging iron chips and improving the surface quality.
  • the inverted strip of the inverted strip reamer used can play a guiding and supporting role. At the same time, the inner arc surface hole and the outer arc surface hole can be reamed to ensure the coaxiality of the hole.
  • FIG3 is a schematic diagram of the overall processing of step 2 in the present invention.
  • FIG4 is a schematic diagram of the processing of step 2 in the present invention.
  • FIG5 is a schematic diagram of the processing of step 3 in the present invention.
  • FIG6 is a processing schematic diagram of step 4 of the present invention.
  • FIG7 is a schematic diagram of the processing of step 5 in the present invention.
  • FIG8 is a processing schematic diagram of step 6 of the present invention.
  • FIG9 is a schematic diagram of the processing of step 7 in the present invention.
  • FIG10 is a schematic diagram of the processing of step 8 in the present invention.
  • FIG11 is a schematic diagram of the processing of step 9 in the present invention.
  • FIG12 is a schematic diagram of the processing of step 11 in the present invention.
  • FIG13 is a schematic diagram of the processing of step 12 of the present invention.
  • the present invention relates to a processing technology for deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump, as shown in FIG1 , comprising the following steps:
  • the sealing chamber 1 is fixed on the workbench 21 of the machining center 20;
  • the angle head 16 is mounted on the machining center 20, and a three-edge milling cutter 19 with a diameter of 100 mm is mounted on the angle head 16.
  • the three-edge milling cutter 19 is used to machine the position of the temperature measuring hole 5 on the inner arc surface 2 into a plane, as shown in FIGS. 3 and 4;
  • a plate drill 8 with a diameter of 30 mm is used on the machining center to pre-machine a temperature measuring hole 5 and two process holes 4 on the outer arc surface 3, as shown in FIG5 ;
  • a thermal expansion rod 10 is used in conjunction with a centering drill 9 with a diameter of 16 mm to penetrate a temperature measuring hole 5 and two process holes 4 on the outer arc surface 3 to respectively machine a temperature measuring hole 5 and a centering hole of M20 thread 6 on the inner arc surface 2, as shown in FIG6 ;
  • a thermal expansion rod 10 is used in conjunction with a stepped drill 11 with a diameter of 7 mm and 14.1 mm to penetrate the temperature measuring hole 5 of the outer arc surface 3 to machine the depth dimension of the temperature measuring hole 5 of the inner arc surface, as shown in FIG7 ;
  • the temperature measuring hole 5 is expanded by using a heat expansion rod 10 and a drill 12 with a diameter of 30.4 mm on the machining center, as shown in FIG8 ;
  • a through hole of the temperature measuring hole 5 is machined on a machining center using a drill bit 13 with a diameter of 7 mm, as shown in FIG9 ;
  • An angle head 16 is installed on a machining center, and a high-speed milling cutter 17 with a diameter of 20 mm is installed on the angle head 16 to process a 45 mm wide inclined groove 7, as shown in FIGS. 2 and 12;
  • the angle head 16 is mounted on the machining center, and a ball-end cutter 18 with a diameter of 20 mm is mounted on the angle head 16 to fine-mill the R10 chamfer position of the inclined groove 7, as shown in FIGS. 2 and 13 .
  • the inverted strip reamer 14 used in step 8) is an integral segmented type.
  • the inverted strip of the inverted strip reamer 14 used in step 8) can play a guiding and supporting role, and at the same time, the holes of the inner arc surface and the outer arc surface are reamed to ensure the coaxiality of the holes.
  • the speed of the drill bit is

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

The present invention relates to a machining process for a deep hole and groove for a temperature measuring element of a nuclear main pump sealed chamber. The machining of a deep hole and groove in multiple layers of a sealed chamber is completed by means of configuring a machining center with an angle head and a three-edge milling cutter and by means of the cooperation of a plurality of cutters. The machining process comprises: fixing a sealed chamber (1) onto an operating platform (21) of a machining center; and mounting an angle head (16) to the machining center (20), mounting a three-edge milling cutter (19) with a diameter of 100 mm to the angle head (16), and using the three-edge milling cutter (19) to machine into a plane the position on an inner arc-shaped surface (2) where a temperature measuring hole (5) is machined. The present invention achieves multilayer deep hole machining with high precision requirements, and involves a stable drilling mode; there is no need to buy professional deep hole machining tools, thereby saving costs for enterprises; the machine tool utilization rate and production capacity are improved, and the machining efficiency is improved manyfold; and the machining process is successfully applied to nuclear main pumps and many other nuclear main pump projects.

Description

核主泵密封室测温元件深孔及槽的加工工艺Processing technology of deep holes and grooves for temperature measuring elements in the sealing chamber of nuclear main pump 技术领域：Technical field:
本发明涉及一种核主泵密封室测温元件深孔及槽的加工工艺。The invention relates to a processing technology for deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump.
背景技术：Background technique:
密封室是核电站主泵的关键部件，内部安装着三级密封部件，对温度控制和测温元件的要求也极高，并且密封室内部承受着高温高压，所以对密封室测温元件深孔的加工质量至关重要。The sealing chamber is a key component of the main pump of a nuclear power plant. It has three-level sealing components installed inside, and has extremely high requirements for temperature control and temperature measuring elements. In addition, the interior of the sealing chamber is subjected to high temperature and high pressure, so the processing quality of the deep holes of the temperature measuring elements in the sealing chamber is crucial.
密封室测温元件深孔长度接近400mm，最小直径为7mm，部分位置粗糙度要求Ra1.6μm，并且是需要穿过两个层面，非常容易损坏加工刀具，对于这种高精度深孔加工，国内外一般采用专业深孔加工机床进行加工，即使是用专业深孔加工机床在加工时也由于是多层面的很难到图纸要求，经常出现到第二层面刀具损坏或与第一层面孔不同轴的情况，同时专业深孔加工机床占用场地大、机床加工方式单一、利用率低、效率不高，而且专业深孔加工机床比较昂贵，普通机床加工深孔无论粗糙度还是位置度均无法达到核电产品的要求。The deep hole length of the sealed room temperature measuring element is close to 400mm, with a minimum diameter of 7mm. The roughness requirement for some positions is Ra1.6μm, and it is necessary to pass through two levels, which is very easy to damage the processing tool. For this kind of high-precision deep hole processing, professional deep hole processing machines are generally used at home and abroad. Even when professional deep hole processing machines are used, it is difficult to meet the requirements of the drawings due to the multi-level processing. It is often the case that the tool on the second level is damaged or is not coaxial with the hole on the first level. At the same time, professional deep hole processing machines occupy a large area, the machine tool processing method is single, the utilization rate is low, the efficiency is not high, and professional deep hole processing machines are relatively expensive. Ordinary machine tools cannot meet the requirements of nuclear power products in terms of roughness or position when processing deep holes.
密封室测温元件的槽是向内倾斜的，一般是采用加长刀杆采用镗床进行加工，但由于刀杆过长而产生颤纹，影响加工质量，又因为槽 是向内倾斜的，如果采用加长刀杆加工向内倾斜的角度时刀杆会与密封室上部产生干涉，所以只能采用手工打磨的方式完成槽的倾斜角度的打磨，影响产品加工质量，很难达到设计要求。The slot of the temperature measuring element in the sealed chamber is inclined inwards. Generally, it is processed by a boring machine with an extended tool bar. However, due to the excessive length of the tool bar, chatter marks are generated, which affects the processing quality. It is inclined inward. If an extended tool rod is used to process the inward inclined angle, the tool rod will interfere with the upper part of the sealing chamber. Therefore, the inclination angle of the groove can only be polished by hand, which affects the product processing quality and is difficult to meet the design requirements.
发明内容：Summary of the invention:
本发明涉的目的是提供一种核主泵密封室测温元件深孔及槽的加工工艺，加工精度高，钻孔方式稳定，节约成本，提高了机床利用率以及生产能力，并成倍提高了加工效率。The purpose of the present invention is to provide a processing technology for deep holes and grooves of temperature measuring elements in the sealing chamber of a nuclear main pump, which has high processing accuracy, stable drilling method, cost savings, improved machine tool utilization and production capacity, and multiplied processing efficiency.
本发明的技术方案是一种核主泵密封室测温元件深孔及槽的加工工艺；The technical solution of the present invention is a process for processing deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump;
1)将密封室(1)固定在加工中心的工作台(21)上；1) Fixing the sealing chamber (1) on a workbench (21) of a machining center;
2)将角度头(16)安装在加工中心(20)上，角度头(16)上安装直径100mm的三面刃铣刀(19)，采用三面刃铣刀(19)在内层圆弧面(2)加工测温孔(5)的位置加工成平面；2) An angle head (16) is mounted on a machining center (20), a three-face milling cutter (19) with a diameter of 100 mm is mounted on the angle head (16), and the three-face milling cutter (19) is used to machine the position of the temperature measuring hole (5) on the inner arc surface (2) into a flat surface;
3)加工中心上采用直径30mm的板钻(8)预加工外层圆弧面(3)的一个测温孔(5)和两个工艺孔(4)；3) A plate drill (8) with a diameter of 30 mm is used on a machining center to pre-machine a temperature measuring hole (5) and two process holes (4) on the outer arc surface (3);
4)加工中心上采用热胀接长杆(10)配合直径16mm的定心钻(9)穿过外层圆弧面(3)的一个测温孔(5)和两个工艺孔(4)，分别加工内层圆弧面(2)的一个测温孔(5)和M20螺纹(6)的定心孔； 4) A thermal expansion rod (10) is used in a machining center in conjunction with a centering drill (9) with a diameter of 16 mm to penetrate a temperature measuring hole (5) and two process holes (4) on the outer arc surface (3), and a temperature measuring hole (5) and a centering hole of an M20 thread (6) are respectively machined on the inner arc surface (2);
5)加工中心上采用热胀接长杆(10)配合直径直接7mm和14.1mm的阶梯钻(11)穿过外层圆弧面(3)的测温孔(5)，加工内层圆弧面的测温孔(5)的深度；5) On the machining center, a thermal expansion rod (10) is used in conjunction with a stepped drill (11) with a diameter of 7 mm and 14.1 mm to penetrate the temperature measuring hole (5) on the outer arc surface (3) to machine the depth of the temperature measuring hole (5) on the inner arc surface;
6)加工中心上采用热胀接长杆(10)配合直径30.4mm的鍃钻(12)对测温孔(5)进行扩孔；6) On the machining center, a heat expansion rod (10) is used in conjunction with a drill (12) with a diameter of 30.4 mm to expand the temperature measuring hole (5);
7)加工中心上用直径7mm的钻头(13)加工测温孔(5)的通孔；7) Using a drill bit (13) with a diameter of 7 mm, a through hole of the temperature measuring hole (5) is machined on a machining center;
8)加工中心上用直径30.6mm的倒条式铰刀(14)同时铰外层圆弧面(3)和内层圆弧面(2)的测温孔(5)；8) Using a 30.6 mm diameter inverted strip reamer (14) on a machining center, the temperature measuring holes (5) of the outer arc surface (3) and the inner arc surface (2) are simultaneously reamed;
9)加工中心上用直径17.5mm的高速钢深孔钻头(15)加工M20螺纹孔(6)的底孔；9) Using a high-speed steel deep hole drill (15) with a diameter of 17.5 mm, the bottom hole of the M20 threaded hole (6) is machined on a machining center;
10)手工攻丝M20螺纹孔(6)的螺纹；10) Manually tap the threads of the M20 threaded hole (6);
11)将角度头(16)安装在加工中心(20)上，角度头(16)上安装直径20mm的高速铣刀(17)加工45mm宽的斜槽(7)；11) An angle head (16) is mounted on a machining center (20), and a high-speed milling cutter (17) with a diameter of 20 mm is mounted on the angle head (16) to machine a 45 mm wide inclined groove (7);
12)将角度头(16)安装在加工中心(20)上，角度头(16)上安装直径20mm的球头刀(18)精铣斜槽(7)R10倒角位置，；12) Install the angle head (16) on the machining center (20), and install a ball-end cutter (18) with a diameter of 20 mm on the angle head (16) to fine-mill the R10 chamfer position of the inclined groove (7);
步骤8)所采用的倒条式铰刀(14)是整体的分段式，步骤8)所采用的倒条式铰刀(14)的倒条可起到导向和支撑作用，同时铰内层圆弧面孔和外层圆弧面的孔，可保证孔的同轴度。 The inverted strip reamer (14) used in step 8) is an integral segmented type. The inverted strip of the inverted strip reamer (14) used in step 8) can play a guiding and supporting role, and at the same time, the holes of the inner arc surface and the outer arc surface are reamed to ensure the coaxiality of the holes.
步骤2)三面刃铣刀的转速n＝160r/min±5r/min，进给速度vf＝80mm/min±5mm/min，切削深度ap＝6mm±1mm；步骤3)板钻的转速n＝800r/min±20r/min，进给速度vf＝150mm/min±10mm/min；步骤4)定心钻的转速n＝1000r/min±20r/min，进给速度vf＝200mm/min±10mm/min；骤5)阶梯钻的转速n＝900r/min±20r/min，进给速度vf＝90mm/min±5mm/min；步骤6)鍃钻的转速n＝80r/min±5r/min，进给速度vf＝16mm/min±2mm/min；步骤7)钻头的转速n＝1550r/min±30r/min，进给速度vf＝60mm/min±5mm/min；步骤8)倒条式铰刀的转速n＝80r/min±5r/min，进给速度vf＝20mm/min±2mm/min。Step 2) The speed of the three-edge milling cutter is n = 160r/min ± 5r/min, the feed speed vf = 80mm/min ± 5mm/min, and the cutting depth ap = 6mm ± 1mm; Step 3) The speed of the plate drill is n = 800r/min ± 20r/min, and the feed speed vf = 150mm/min ± 10mm/min; Step 4) The speed of the center drill is n = 1000r/min ± 20r/min, and the feed speed vf = 200mm/min ± 10mm/min; Step 5) The speed of the step drill is n = 900 r/min±20r/min, feed speed vf＝90mm/min±5mm/min; step 6) the rotation speed of the drill n＝80r/min±5r/min, feed speed vf＝16mm/min±2mm/min; step 7) the rotation speed of the drill bit n＝1550r/min±30r/min, feed speed vf＝60mm/min±5mm/min; step 8) the rotation speed of the inverted bar reamer n＝80r/min±5r/min, feed speed vf＝20mm/min±2mm/min.
本发明技术效果：Technical effects of the present invention:
采用这种加工工艺，首先是采用加工中心配置角度头来实现加工内层圆弧平面，通过各种角度的变换，利用仿真软件进行模拟加工，防止角度头与工件加工干涉，避免了加工过程中产生的碰撞，然后在内层圆弧平面加工定心孔，避免内层内层圆弧无法定心的情况，通过各种刀具配合，选用了适合的参数，从而完成了高精度要求的多层面的阶梯深孔的加工，并且钻孔方式稳定，满足设计要求。第二是采用这种工艺方法不用在购买专业深孔加工机床，节省购买专业深孔加工机床，为企业节约成本提高了机床利用率以及生产能力，第三是成倍提高了加工效率，专用机床只能加工深孔，无法加工平面及斜槽等， 而平面及斜槽都可在加工中心上一次装夹完成全部工序加工，采用这种工艺方法相对于专用机床可缩短一倍以上的加工时间，第四是步骤11)和12)通过加工中心和角度头加工斜槽替代了手工打磨的方式完成槽的倾斜角度的加工，大大提高了产品制造效率和加工精度。这种工艺方法对核主泵关键工艺国产化具有重要意义，成功应用于“华龙一号”核主泵和众多其它核主泵项目上。When using this processing technology, the first step is to use an angle head on the machining center to process the inner arc plane. By changing various angles and using simulation software to simulate processing, the interference between the angle head and the workpiece can be prevented, and collisions can be avoided during processing. Then, the centering hole is processed on the inner arc plane to avoid the situation where the inner arc cannot be centered. By coordinating various tools and selecting appropriate parameters, the processing of multi-layer stepped deep holes with high-precision requirements is completed, and the drilling method is stable to meet the design requirements. Secondly, this process method does not require the purchase of professional deep hole processing machine tools, which saves the cost of purchasing professional deep hole processing machine tools, improves machine tool utilization and production capacity, and thirdly, it multiplies the processing efficiency. Special machine tools can only process deep holes, and cannot process planes and bevel grooves, etc. The plane and the bevel can be clamped in the machining center once to complete all the processing steps. This process method can shorten the processing time by more than half compared with special machine tools. Fourthly, in steps 11) and 12), the bevel is processed by the machining center and the angle head instead of manual grinding to complete the processing of the inclination angle of the groove, which greatly improves the product manufacturing efficiency and processing accuracy. This process method is of great significance to the localization of key processes of nuclear main pumps, and has been successfully applied to the "Hualong One" nuclear main pump and many other nuclear main pump projects.
权利要求2中所述的步骤8),所采用的倒条式铰刀是定制的整体的分段式，这种铰刀的优点首先是可以减小加工扭矩，避免加工时产生振动从而影响加工质量，第二是分段式便于排出铁屑，提高表面质量，第三是所采用的倒条式铰刀的倒条，可起到导向和支撑作用，同时铰内层圆弧面孔和外层圆弧面的孔，可保证孔的同轴度。In step 8) described in claim 2, the inverted strip reamer used is a customized integral segmented type. The advantages of this reamer are that it can first reduce the processing torque and avoid vibration during processing, thereby affecting the processing quality. Second, the segmented type is convenient for discharging iron chips and improving the surface quality. Third, the inverted strip of the inverted strip reamer used can play a guiding and supporting role. At the same time, the inner arc surface hole and the outer arc surface hole can be reamed to ensure the coaxiality of the hole.
权利要求3中所述步骤2)三面刃铣刀的转速n＝160r/min±5r/min，进给速度vf＝80mm/min±5mm/min，切削深度ap＝6mm±1mm；步骤3)板钻的转速n＝800r/min±20r/min，进给速度vf＝150mm/min±10mm/min；步骤4)定心钻的转速n＝1000r/min±20r/min，进给速度vf＝200mm/min±10mm/min；骤5)阶梯钻的转速n＝900r/min±20r/min，进给速度vf＝90mm/min±5mm/min；步骤6)鍃钻的转速n＝80r/min±5r/min，进给速度vf＝16mm/min±2mm/min；步骤7)钻头的转速n＝1550r/min±30r/min，进给速度vf＝60mm/min±5mm/min； 步骤8)倒条式铰刀的转速n＝80r/min±5r/min，进给速度vf＝20mm/min±2mm/min的，经过实践摸索的这些参数，可以使加工的深孔尺寸、表面粗糙度、同轴度等技术要求都符合设计要求，不会出现深孔加工容易出现的刀具断裂的情况。In claim 3, the rotation speed of the three-edge milling cutter in step 2) is n = 160r/min ± 5r/min, the feed speed vf = 80mm/min ± 5mm/min, and the cutting depth ap = 6mm ± 1mm; the rotation speed of the plate drill in step 3) is n = 800r/min ± 20r/min, and the feed speed vf = 150mm/min ± 10mm/min; the rotation speed of the center drill in step 4) is n = 1000r/min ± 20r/min, and the feed speed vf = 200 mm/min±10mm/min; Step 5) Step drill speed n＝900r/min±20r/min, feed speed vf＝90mm/min±5mm/min; Step 6) Drill speed n＝80r/min±5r/min, feed speed vf＝16mm/min±2mm/min; Step 7) Drill speed n＝1550r/min±30r/min, feed speed vf＝60mm/min±5mm/min; Step 8) The rotation speed of the inverted strip reamer is n = 80r/min ± 5r/min, and the feed speed is vf = 20mm/min ± 2mm/min. These parameters, which have been explored in practice, can make the technical requirements such as the processed deep hole size, surface roughness, and coaxiality meet the design requirements, and the tool breakage that is prone to occur in deep hole processing will not occur.
附图说明：Description of the drawings:
图1核主泵密封室测温元件深孔位置图Figure 1 Location of deep holes for temperature measuring elements in the sealing chamber of the nuclear main pump
图2核主泵密封室测温元件斜槽位置图Figure 2 Position of the temperature measuring element chute in the nuclear main pump sealing chamber
图3是本发明中步骤2的整体加工示意图；FIG3 is a schematic diagram of the overall processing of step 2 in the present invention;
图4是本发明中步骤2的加工示意图；FIG4 is a schematic diagram of the processing of step 2 in the present invention;
图5是本发明中步骤3的加工示意图；FIG5 is a schematic diagram of the processing of step 3 in the present invention;
图6是本发明中步骤4的加工示意图；FIG6 is a processing schematic diagram of step 4 of the present invention;
图7是本发明中步骤5的加工示意图；FIG7 is a schematic diagram of the processing of step 5 in the present invention;
图8是本发明中步骤6的加工示意图；FIG8 is a processing schematic diagram of step 6 of the present invention;
图9是本发明中步骤7的加工示意图；FIG9 is a schematic diagram of the processing of step 7 in the present invention;
图10是本发明中步骤8的加工示意图；FIG10 is a schematic diagram of the processing of step 8 in the present invention;
图11是本发明中步骤9的加工示意图；FIG11 is a schematic diagram of the processing of step 9 in the present invention;
图12是本发明中步骤11的加工示意图；FIG12 is a schematic diagram of the processing of step 11 in the present invention;
图13是本发明中步骤12的加工示意图；FIG13 is a schematic diagram of the processing of step 12 of the present invention;
具体实施方式： Detailed ways:
本发明涉及一种核主泵密封室测温元件深孔及槽的加工工艺，如图1所示，包括以下步骤：The present invention relates to a processing technology for deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump, as shown in FIG1 , comprising the following steps:
1)如图3所示，将密封室1固定在加工中心20的工作台21上；1) As shown in FIG. 3 , the sealing chamber 1 is fixed on the workbench 21 of the machining center 20;
2)将角度头16安装在加工中心20上，角度头16上安装直径100mm的三面刃铣刀19，采用三面刃铣刀19在内层圆弧面2加工测温孔5的位置加工成平面，如图3和图4所示；2) The angle head 16 is mounted on the machining center 20, and a three-edge milling cutter 19 with a diameter of 100 mm is mounted on the angle head 16. The three-edge milling cutter 19 is used to machine the position of the temperature measuring hole 5 on the inner arc surface 2 into a plane, as shown in FIGS. 3 and 4;
3)加工中心上采用直径30mm的板钻8预加工外层圆弧面3的一个测温孔5和两个工艺孔4，如图5所示；3) A plate drill 8 with a diameter of 30 mm is used on the machining center to pre-machine a temperature measuring hole 5 and two process holes 4 on the outer arc surface 3, as shown in FIG5 ;
4)加工中心上采用热胀接长杆10配合直径16mm的定心钻9穿过外层圆弧面3的一个测温孔5和两个工艺孔4分别加工内层圆弧面2的一个测温孔5和M20螺纹6的定心孔，如图6所示；4) On the machining center, a thermal expansion rod 10 is used in conjunction with a centering drill 9 with a diameter of 16 mm to penetrate a temperature measuring hole 5 and two process holes 4 on the outer arc surface 3 to respectively machine a temperature measuring hole 5 and a centering hole of M20 thread 6 on the inner arc surface 2, as shown in FIG6 ;
5)加工中心上采用热胀接长杆10配合直径直接7mm和14.1mm的阶梯钻11穿过外层圆弧面3的测温孔5加工内层圆弧面的测温孔5的深度尺寸，如图7所示；5) On the machining center, a thermal expansion rod 10 is used in conjunction with a stepped drill 11 with a diameter of 7 mm and 14.1 mm to penetrate the temperature measuring hole 5 of the outer arc surface 3 to machine the depth dimension of the temperature measuring hole 5 of the inner arc surface, as shown in FIG7 ;
6)加工中心上采用热胀接长杆10配合直径30.4mm的鍃钻12对测温孔5进行扩孔，如图8所示；6) The temperature measuring hole 5 is expanded by using a heat expansion rod 10 and a drill 12 with a diameter of 30.4 mm on the machining center, as shown in FIG8 ;
7)加工中心上用直径7mm的钻头13加工测温孔5的通孔，如图9所示； 7) A through hole of the temperature measuring hole 5 is machined on a machining center using a drill bit 13 with a diameter of 7 mm, as shown in FIG9 ;
8)加工中心上用直径30.6mm的倒条式铰刀14同时铰外层圆弧面3和内层圆弧面2的测温孔5，如图10所示；8) Using a 30.6 mm diameter inverted strip reamer 14 on a machining center, the temperature measuring holes 5 of the outer arc surface 3 and the inner arc surface 2 are simultaneously reamed, as shown in FIG. 10 ;
9)加工中心上用直径17.5mm的高速钢深孔钻头15加工M20螺纹孔6的底孔，如图11所示；9) Use a high-speed steel deep hole drill 15 with a diameter of 17.5 mm to machine the bottom hole of the M20 threaded hole 6 on the machining center, as shown in FIG11 ;
10)手工攻丝M20螺纹孔6的螺纹；10) Manually tap the thread of M20 threaded hole 6;
11)将角度头16安装在加工中心上，角度头16上安装直径20mm的高速铣刀17加工45mm宽的斜槽7，如图2、图12所示；11) An angle head 16 is installed on a machining center, and a high-speed milling cutter 17 with a diameter of 20 mm is installed on the angle head 16 to process a 45 mm wide inclined groove 7, as shown in FIGS. 2 and 12;
12)将角度头16安装在加工中心上，角度头16上安装直径20mm的球头刀18精铣斜槽7的R10倒角位置，如图2、图13所示。12) The angle head 16 is mounted on the machining center, and a ball-end cutter 18 with a diameter of 20 mm is mounted on the angle head 16 to fine-mill the R10 chamfer position of the inclined groove 7, as shown in FIGS. 2 and 13 .
步骤8)所采用的倒条式铰刀14是整体的分段式，步骤8)所采用的倒条式铰刀14的倒条可起到导向和支撑作用，同时铰内层圆弧面孔和外层圆弧面的孔，可保证孔的同轴度。The inverted strip reamer 14 used in step 8) is an integral segmented type. The inverted strip of the inverted strip reamer 14 used in step 8) can play a guiding and supporting role, and at the same time, the holes of the inner arc surface and the outer arc surface are reamed to ensure the coaxiality of the holes.
步骤2)三面刃铣刀的转速n＝160r/min±5r/min，进给速度vf＝80mm/min±5mm/min，切削深度ap＝6mm±1mm；步骤3)板钻的转速n＝800r/min±20r/min，进给速度vf＝150mm/min±10mm/min；步骤4)定心钻的转速n＝1000r/min±20r/min，进给速度vf＝200mm/min±10mm/min；骤5)阶梯钻的转速n＝900r/min±20r/min，进给速度vf＝90mm/min±5mm/min；步骤6)鍃钻的转速n＝80r/min±5r/min，进给速度vf＝16mm/min±2mm/min；步骤7)钻头的转速n＝1550r/min ±30r/min，进给速度vf＝60mm/min±5mm/min；步骤8)倒条式铰刀的转速n＝80r/min±5r/min，进给速度vf＝20mm/min±2mm/min。 Step 2) The speed of the three-edge milling cutter is n = 160r/min ± 5r/min, the feed speed vf is 80mm/min ± 5mm/min, and the cutting depth ap is 6mm ± 1mm; Step 3) The speed of the plate drill is n = 800r/min ± 20r/min, and the feed speed vf is 150mm/min ± 10mm/min; Step 4) The speed of the center drill is n = 1000r/min ± 20r/min, and the feed speed vf is 200mm/min ± 10mm/min; Step 5) The speed of the step drill is n = 900r/min ± 20r/min, and the feed speed vf is 90mm/min ± 5mm/min; Step 6) The speed of the forging drill is n = 80r/min ± 5r/min, and the feed speed vf is 16mm/min ± 2mm/min; Step 7) The speed of the drill bit is n = 1550r/min ±30r/min, feed speed vf＝60mm/min±5mm/min; Step 8) The rotation speed n of the inverted strip reamer is n＝80r/min±5r/min, and the feed speed vf＝20mm/min±2mm/min.

Claims (3)

  1. 一种核主泵密封室测温元件深孔及槽的加工工艺，其特征是：通过给加工中心配置角度头及三面刃铣刀及多种刀具配合来完成密封室多层面的深孔及槽的加工，包括以下步骤：A process for processing deep holes and grooves of temperature measuring elements in a sealing chamber of a nuclear main pump is characterized in that the processing of deep holes and grooves on multiple levels of the sealing chamber is completed by configuring an angle head, a three-face milling cutter and a variety of tools in a machining center, and includes the following steps:
    1)将密封室(1)固定在加工中心的工作台(21)上；1) Fixing the sealing chamber (1) on a workbench (21) of a machining center;
    2)将角度头(16)安装在加工中心(20)上，角度头(16)上安装直径100mm的三面刃铣刀(19)，采用三面刃铣刀(19)在内层圆弧面(2)加工测温孔(5)的位置加工成平面；2) An angle head (16) is mounted on a machining center (20), a three-face milling cutter (19) with a diameter of 100 mm is mounted on the angle head (16), and the three-face milling cutter (19) is used to machine the position of the temperature measuring hole (5) on the inner arc surface (2) into a flat surface;
    3)加工中心上采用直径30mm的板钻(8)预加工外层圆弧面(3)的一个测温孔(5)和两个工艺孔(4)；3) A plate drill (8) with a diameter of 30 mm is used on a machining center to pre-machine a temperature measuring hole (5) and two process holes (4) on the outer arc surface (3);
    4)加工中心上采用热胀接长杆(10)配合直径16mm的定心钻(9)穿过外层圆弧面(3)的一个测温孔(5)和两个工艺孔(4)，分别加工内层圆弧面(2)的一个测温孔(5)和M20螺纹(6)的定心孔；4) A thermal expansion rod (10) is used in a machining center in conjunction with a centering drill (9) with a diameter of 16 mm to penetrate a temperature measuring hole (5) and two process holes (4) on the outer arc surface (3), and a temperature measuring hole (5) and a centering hole of an M20 thread (6) are respectively machined on the inner arc surface (2);
    5)加工中心上采用热胀接长杆(10)配合直径直接7mm和14.1mm的阶梯钻(11)穿过外层圆弧面(3)的测温孔(5)，加工内层圆弧面的测温孔(5)的深度；5) On the machining center, a thermal expansion rod (10) is used in conjunction with a stepped drill (11) with a diameter of 7 mm and 14.1 mm to penetrate the temperature measuring hole (5) on the outer arc surface (3) to machine the depth of the temperature measuring hole (5) on the inner arc surface;
    6)加工中心上采用热胀接长杆(10)配合直径30.4mm的鍃钻 (12)对测温孔(5)进行扩孔；6) The machining center uses a heat expansion rod (10) to match a 30.4mm diameter drill. (12) expanding the temperature measuring hole (5);
    7)加工中心上用直径7mm的钻头(13)加工测温孔(5)的通孔；7) Using a drill bit (13) with a diameter of 7 mm, a through hole of the temperature measuring hole (5) is machined on a machining center;
    8)加工中心上用直径30.6mm的倒条式铰刀(14)同时铰外层圆弧面(3)和内层圆弧面(2)的测温孔(5)；8) Using a 30.6 mm diameter inverted strip reamer (14) on a machining center, the temperature measuring holes (5) of the outer arc surface (3) and the inner arc surface (2) are simultaneously reamed;
    9)加工中心上用直径17.5mm的高速钢深孔钻头(15)加工M20螺纹孔(6)的底孔；9) Using a high-speed steel deep hole drill (15) with a diameter of 17.5 mm, the bottom hole of the M20 threaded hole (6) is machined on a machining center;
    10)手工攻丝M20螺纹孔(6)的螺纹；10) Manually tap the threads of the M20 threaded hole (6);
    11)将角度头(16)安装在加工中心(20)上，角度头(16)上安装直径20mm的高速铣刀(17)加工45mm宽的斜槽(7)；11) An angle head (16) is mounted on a machining center (20), and a high-speed milling cutter (17) with a diameter of 20 mm is mounted on the angle head (16) to machine a 45 mm wide inclined groove (7);
    12)将角度头(16)安装在加工中心(20)上，角度头(16)上安装直径20mm的球头刀(18)精铣斜槽(7)R10倒角位置。12) An angle head (16) is mounted on a machining center (20), and a ball-end cutter (18) with a diameter of 20 mm is mounted on the angle head (16) to fine-mill the R10 chamfer position of the inclined groove (7).
  2. 根据权利要求1的核主泵密封室测温元件深孔及槽的加工工艺，其特征是：步骤8)所采用的倒条式铰刀(14)是整体的分段式，步骤8)所采用的倒条式铰刀(14)的倒条可起到导向和支撑作用，同时铰内层圆弧面孔和外层圆弧面的孔，可保证孔的同轴度。According to the processing technology of deep holes and grooves of temperature measuring elements in the sealing chamber of the nuclear main pump according to claim 1, it is characterized in that: the inverted strip reamer (14) used in step 8) is an integral segmented type, and the inverted strip of the inverted strip reamer (14) used in step 8) can play a guiding and supporting role, and at the same time, the holes of the inner arc surface and the outer arc surface are reamed to ensure the coaxiality of the holes.
  3. 根据权利要求1的核主泵密封室测温元件深孔及槽的加工工艺，其特征是：步骤2)三面刃铣刀的转速n＝160r/min±5r/min，进给速度vf＝80mm/min±5mm/min，切削深度ap＝6mm±1mm；步骤3)板 钻的转速n＝800r/min±20r/min，进给速度vf＝150mm/min±10mm/min；步骤4)定心钻的转速n＝1000r/min±20r/min，进给速度vf＝200mm/min±10mm/min；骤5)阶梯钻的转速n＝900r/min±20r/min，进给速度vf＝90mm/min±5mm/min；步骤6)鍃钻的转速n＝80r/min±5r/min，进给速度vf＝16mm/min±2mm/min；步骤7)钻头的转速n＝1550r/min±30r/min，进给速度vf＝60mm/min±5mm/min；步骤8)倒条式铰刀的转速n＝80r/min±5r/min，进给速度vf＝20mm/min±2mm/min。 According to the processing technology of deep holes and grooves of temperature measuring elements in the sealing chamber of the nuclear main pump according to claim 1, it is characterized by: step 2) the rotation speed of the three-edge milling cutter n = 160r/min ± 5r/min, the feed speed vf = 80mm/min ± 5mm/min, and the cutting depth ap = 6mm ± 1mm; step 3) the plate The speed of the drill is n=800r/min±20r/min, and the feed speed is vf=150mm/min±10mm/min; Step 4) The speed of the center drill is n=1000r/min±20r/min, and the feed speed is vf=200mm/min±10mm/min; Step 5) The speed of the step drill is n=900r/min±20r/min, and the feed speed is vf=90mm/min±5mm/min; Step 6) The speed of the forging drill is n=80r/min±5r/min, and the feed speed is vf=16mm/min±2mm/min; Step 7) The speed of the drill bit is n=1550r/min±30r/min, and the feed speed is vf=60mm/min±5mm/min; Step 8) The speed of the inverted strip reamer is n=80r/min±5r/min, and the feed speed is vf=20mm/min±2mm/min.
PCT/CN2023/123314 2022-10-27 2023-10-08 Machining process for deep hole and groove for temperature measuring element of nuclear main pump sealed chamber WO2024088032A1 (en)

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CN115592155A (en) * 2022-10-27 2023-01-13 哈尔滨电气动力装备有限公司（Cn） Processing technology for deep hole and groove of temperature measuring element of nuclear main pump sealing chamber

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CN204122846U (en) * 2014-08-29 2015-01-28 杜德术 AP1000 nuclear power station main pump Canopy device for sealed-cutting
CN106312158A (en) * 2016-09-30 2017-01-11 中国南方航空工业(集团)有限公司 Chute machining method for inner wall face of case of aero-engine
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CN112496789A (en) * 2020-11-23 2021-03-16 哈尔滨电气动力装备有限公司 Mounting and adjusting process before reaming of nuclear main pump drill
CN115592155A (en) * 2022-10-27 2023-01-13 哈尔滨电气动力装备有限公司（Cn） Processing technology for deep hole and groove of temperature measuring element of nuclear main pump sealing chamber

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Publication number Priority date Publication date Assignee Title
CN204122846U (en) * 2014-08-29 2015-01-28 杜德术 AP1000 nuclear power station main pump Canopy device for sealed-cutting
CN106312158A (en) * 2016-09-30 2017-01-11 中国南方航空工业(集团)有限公司 Chute machining method for inner wall face of case of aero-engine
RU2672461C1 (en) * 2018-05-23 2018-11-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный технологический университет" (ФГБОУ ВО "КубГТУ") Method of drilling through openings in copper
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