WO2020253818A1 - Procédé d'usinage destiné à une pièce de grand diamètre à paroi mince - Google Patents

Procédé d'usinage destiné à une pièce de grand diamètre à paroi mince Download PDF

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Publication number
WO2020253818A1
WO2020253818A1 PCT/CN2020/097053 CN2020097053W WO2020253818A1 WO 2020253818 A1 WO2020253818 A1 WO 2020253818A1 CN 2020097053 W CN2020097053 W CN 2020097053W WO 2020253818 A1 WO2020253818 A1 WO 2020253818A1
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WIPO (PCT)
Prior art keywords
outer circle
semi
machining
finished product
inner hole
Prior art date
Application number
PCT/CN2020/097053
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English (en)
Chinese (zh)
Inventor
陈少峰
肜建森
Original Assignee
苏州市意可机电有限公司
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Application filed by 苏州市意可机电有限公司 filed Critical 苏州市意可机电有限公司
Priority to GB2108394.4A priority Critical patent/GB2594182B/en
Publication of WO2020253818A1 publication Critical patent/WO2020253818A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/22—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cartridges or like shells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
    • B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
    • B23Q3/065—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding workpieces being specially deformable, e.g. made from thin-walled or elastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/01—Aircraft parts

Definitions

  • the invention relates to the field of mechanical processing and manufacturing, in particular to a processing technology of a large-diameter and thin-walled part of an aviation avionics kitchen and bathroom system.
  • the structure of the large thin-walled pipeline of the aviation avionics kitchen and bathroom system is relatively complex, with a maximum diameter of 360mm, a total length of 560mm, and a minimum wall thickness of 1.3mm.
  • the position of the hole on the flange surface of the workpiece is required to be higher than the inner hole of the workpiece.
  • the part structure is asymmetrical, there are gaps, and it is easy to deform during the cutting process.
  • the part material is selected as stainless steel 17-4PH.
  • the material has high high-temperature strength and high-temperature hardness. The cutting force generated during the machining process, the surface work hardening, the chip is difficult to break, the sticking of the tool, accelerates the tool wear, and the cutting temperature is high.
  • the structure is a thin-walled part, and the machining process is greatly affected by cutting force, clamping force, cutting temperature, etc., which will affect the dimensional accuracy and surface quality of the parts, resulting in large deformation and processing difficulties.
  • the machining of this part, especially for milling needs to be processed in multiple processes, which cannot be completed at the same time under one clamping. This will increase the clamping time, and will also generate cumulative errors, which will affect the product accuracy and increase Machining time, product process efficiency is low.
  • the technical problem to be solved by the present invention is to provide a process for processing large-diameter and thin-walled parts with convenient processing and improved accuracy.
  • a processing technology of a large-diameter thin-walled part includes an axial inner hole, an outer circle on the outside, a flange on the outer circle, and Close to a plurality of bosses in the radial direction of the flange, the plurality of bosses and flanges divide the outer circle into a first outer circle and a second outer circle.
  • the processing steps are as follows:
  • the inner hole is processed by wire cutting on the raw material, and a machining allowance of 2 ⁇ 3mm is left on one side of the inner hole;
  • step S4 Perform aging heat treatment on the semi-finished product obtained in step S3;
  • step S11 The positioning surface in step S11 is downward, the inner hole is fixed by a hydraulic clamping fixture, and a pressure of 1.0-1.2Mpa is applied for clamping, and the process bosses are processed to form a plurality of bosses.
  • the hardness of the aging heat treatment in the step S4 is controlled at HRC 34-42.
  • the position of the first outer circle close to the first end, the position of the second outer circle close to the second end, and the process step close to the first end by turning between the steps S4 and S5 The position of the part is processed to the light for clamping.
  • step S5 step S6, step S8, step S9, and step S10, a center frame is used to support the process steps.
  • the pressure release is completed within 30 minutes after the processing in step S11 and step S12 is completed.
  • the load of the main shaft in the processing process is controlled within 5.5 KW.
  • the large-diameter thin-walled part is made of 17-4PH stainless steel.
  • one of the two discs in the step S9 is provided with a tapered hole at its center, and the tapered hole is matched with a thimble.
  • the beneficial effects of the present invention are: design a stable process route to control deformation, reduce the number of clamping, shorten the processing time, thereby improve the processing efficiency and ensure the product quality; through the inner hole positioning to complete all features on the basis of the specified clamping force
  • the one-time processing ensures that the product deformation is within the controllable range; the use of reasonable process parameters to achieve accurate production guidance work, get rid of the limitations of special personnel and special machines, and better complete automated production; improve product process efficiency and product quality.
  • FIG. 1 is a flowchart of the present invention
  • Figure 2 is a schematic structural view of the finished product of the large-diameter thin-walled part of the present invention
  • Fig. 3 is a structural schematic diagram of an intermediate state of the large-diameter thin-walled part of the present invention.
  • a large-diameter thin-walled part processing technology the large-diameter thin-walled part includes an axial inner hole 5, an outer circle on the outside, a flange 3 on the outer circle, and a proximity method
  • a plurality of bosses 4 in the radial direction of the flange 3, the plurality of bosses 4 and flanges 3 divide the outer circle into a first outer circle 1 and a second outer circle 2.
  • the processing steps are as follows:
  • the inner hole 5 is processed by wire cutting on the stainless steel material, and processed to the required size according to the actual size of the inner hole 5. Considering the heat treatment deformation and subsequent finishing, the inner hole 5 is left with 2 ⁇ 3mm machining allowance, this machining is rough machining.
  • step S4 Perform aging heat treatment on the semi-finished product obtained in step S3, so that the hardness of the semi-finished product reaches HRC34-42.
  • the first end 7 is held by the center frame for auxiliary support on the process step 6, and the visible area of the second outer circle 2 and the visible area of the process step 6 are verified by a dial indicator to ensure its roundness
  • the runout is within 0.1mm.
  • the inner hole 5, the second outer circle 2, the process step 6 and the second end 8 are semi-finished, and a machining allowance of 0.5-0.8mm is left.
  • the semi-finished product is treated with natural aging, and the treatment time is 7-8 hours.
  • the first end 7 of the semi-finished product is fixed by clamping the visible area of the first outer circle 1 by a three-jaw chuck, and at the same time, auxiliary support is provided on the process step 6 of the center frame clamping process, and the second outer circle Check the visible area on circle 2 to ensure that its circle runout is within 0.08mm. At this time, finish machining the inner hole 5 and the second end 8 to meet the dimensions required by the drawing.
  • step S10 Turn the semi-finished product over, insert a disc without a tapered hole into the inner hole of the second end 8, and insert a disc with a tapered hole into the inner hole of the first end 7.
  • the fixing method and verification method are as in step S9 , The second end 8 of the semi-finished product and the auxiliary support are fixed, and the first outer circle 1 is finished to the required size.
  • the inner hole 5 is fixed by a hydraulic clamping fixture, and a 0.05mm plug is used to check whether the first end 7 and the bonding surface of the hydraulic clamping fixture fit in place.
  • the hydraulic clamping fixture applies a pressure of 1.0 ⁇ 1.2Mpa to clamp, and then the end surface of the second end 8 is tested by a dial indicator to ensure that the runout is controlled within 0.1mm, and a hole is processed on the process step 6. And the positioning surface to form the flange 3; after finishing the processing, the pressure needs to be released in the hydraulic clamping fixture within 30 minutes.
  • step S12 Place the positioning surface in step S11 downwards, the inner hole 5 is fixed by a hydraulic clamping fixture, and use a 0.05mm plug to check whether the second end 8 and the bonding surface of the hydraulic clamping fixture fit in place.
  • the hydraulic clamping fixture applies a pressure of 1.0 ⁇ 1.2Mpa to clamp, and then uses a dial indicator to detect the end surface and circumferential direction of the second end 8 to ensure that the runout is controlled within 0.1mm, and the process step 6 is processed , Forming multiple bosses 4 and flanges 3 to the required size; after finishing processing, it is necessary to release the pressure within 30 minutes of the hydraulic clamping fixture.
  • the spindle load of the whole machining process mentioned above is controlled within 25%, that is, within 5.5KW.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Forging (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

L'invention concerne un procédé d'usinage destiné à une pièce de grand diamètre à paroi mince. Le procédé d'usinage comprend les étapes suivantes consistant : S1. à sélectionner une matière première ayant une taille appropriée ; S2. à usiner un trou interne (5) ; S3. à réaliser la mise en forme ; S4. à réaliser un traitement thermique de vieillissement ; S5. à réaliser la semi-finition du trou interne (5) et d'une partie de la forme ; S6. à réaliser la semi-finition d'une partie de la forme ; S7. à réaliser un traitement de vieillissement naturel ; S8. à réaliser la finition du trou interne (5) et d'une seconde extrémité (8) ; S9. à réaliser la finition d'un second cercle externe (2) et d'une étape du processus (6) ; S10. à réaliser la finition d'un premier cercle externe (1) ; S11. à usiner et à former une bride (3) ; et S12. à usiner et à former de multiples saillies (4). Selon le procédé d'usinage, un cheminement de processus stable est conçu pour réguler la déformation, réduire le nombre de positionnement et de serrage, raccourcir le temps d'usinage, améliorer l'efficacité d'usinage et assurer une qualité de produit ; l'usinage en une fois de tous les éléments est mis en œuvre au moyen du positionnement du trou interne (5), assurant que la déformation du produit se situe dans une plage réglable ; des paramètres de processus raisonnables sont utilisés pour obtenir un travail de guidage de production précis, s'affranchir de la limitation que représente une personne particulière et une machine particulière, et réussir la mise en place d'une production automatisée.
PCT/CN2020/097053 2019-06-20 2020-06-19 Procédé d'usinage destiné à une pièce de grand diamètre à paroi mince WO2020253818A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2108394.4A GB2594182B (en) 2019-06-20 2020-06-19 Machining process for large-diameter thin-walled part

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910535490.8 2019-06-20
CN201910535490.8A CN110102988B (zh) 2019-06-20 2019-06-20 一种大直径薄壁件的加工工艺

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WO2020253818A1 true WO2020253818A1 (fr) 2020-12-24

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CN (1) CN110102988B (fr)
GB (1) GB2594182B (fr)
WO (1) WO2020253818A1 (fr)

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CN112846478A (zh) * 2020-12-31 2021-05-28 湖北三江航天红阳机电有限公司 一种大型薄壁易变形舱段壳体加工方法
CN112975483A (zh) * 2021-01-21 2021-06-18 武汉船用机械有限责任公司 叉形零件的加工方法
CN113102954A (zh) * 2021-04-23 2021-07-13 无锡市航鹄科技有限公司 航空精密薄壁零件的加工检测方法
CN113732633A (zh) * 2021-09-22 2021-12-03 牧野机床（中国）有限公司 一种组合件的加工方法
CN113798547A (zh) * 2021-09-27 2021-12-17 大连船用柴油机有限公司 薄壁长筒类零件镗孔装夹方法
CN113798789A (zh) * 2021-09-03 2021-12-17 河南中原特钢装备制造有限公司 一种试验用装配体的制造工艺
CN113814675A (zh) * 2021-11-05 2021-12-21 四川航天烽火伺服控制技术有限公司 一种钳式夹具制造方法
CN114161095A (zh) * 2021-12-27 2022-03-11 中船重工西安东仪科工集团有限公司 一种工程塑料长管薄壁零件的装夹方法
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WO2023070921A1 (fr) * 2021-10-28 2023-05-04 航天精工股份有限公司 Procédé d'usinage à commande numérique de précision pour pièce de barillet d'objectif à paroi mince en alliage de titane
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CN112846478A (zh) * 2020-12-31 2021-05-28 湖北三江航天红阳机电有限公司 一种大型薄壁易变形舱段壳体加工方法
CN112975483A (zh) * 2021-01-21 2021-06-18 武汉船用机械有限责任公司 叉形零件的加工方法
CN113102954A (zh) * 2021-04-23 2021-07-13 无锡市航鹄科技有限公司 航空精密薄壁零件的加工检测方法
CN113798789B (zh) * 2021-09-03 2023-05-16 河南中原特钢装备制造有限公司 一种试验用装配体的制造工艺
CN113798789A (zh) * 2021-09-03 2021-12-17 河南中原特钢装备制造有限公司 一种试验用装配体的制造工艺
CN113732633A (zh) * 2021-09-22 2021-12-03 牧野机床（中国）有限公司 一种组合件的加工方法
CN113798547A (zh) * 2021-09-27 2021-12-17 大连船用柴油机有限公司 薄壁长筒类零件镗孔装夹方法
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