CN111456815A - Wheel disc assembly and five-axis machining method thereof - Google Patents
Wheel disc assembly and five-axis machining method thereof Download PDFInfo
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- CN111456815A CN111456815A CN202010361357.8A CN202010361357A CN111456815A CN 111456815 A CN111456815 A CN 111456815A CN 202010361357 A CN202010361357 A CN 202010361357A CN 111456815 A CN111456815 A CN 111456815A
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- wheel disc
- processing
- disc assembly
- cutter
- blade
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- 238000003754 machining Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 238000003801 milling Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 8
- 239000000306 component Substances 0.000 description 14
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
-
- 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
- B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
- F01D5/3015—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type with side plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/322—Blade mountings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Milling Processes (AREA)
Abstract
The invention relates to a wheel disc assembly and a five-axis machining method thereof, which are carried out according to the following steps: (1) programming the shape of a required blank, and then lathing the blank; (2) clamping the blank on a five-axis numerical control machine tool workbench; (3) washing out the key groove on the central hole by using a proper cutter; (4) modifying the parameters of the cutter, and processing the contour of the wheel disc assembly; (5) detaching the parts, turning the processing surface, and then clamping the parts; (6) changing the geometrical parameters of the cutter, and processing the contour of the back along the tool path; (7) processing a contact surface of a side face wheel disc and a blade combination of the wheel disc assembly; (8) positioning the position of the contact surface hole by using a centering drill, and then drilling a hole by using a twist drill; (9) and (4) after the parts are detached, inspecting, cleaning and warehousing. Compared with the prior art, the method has the advantages that the contour of the part is processed through various processing modes, the most efficient processing mode is selected by comparing the tool path tracks, and the processing of the wheel disc assembly part is optimized.
Description
Technical Field
The invention belongs to the technical field of wheel disc assembly parts, and relates to a wheel disc assembly and a five-axis machining method thereof.
Background
The wheel disc assembly is used as a core component of parts such as an aircraft engine, a gas turbine and the like, and the product performance and the processing and manufacturing of the wheel disc assembly are concerned. The operating conditions of the disk assembly are very severe and are subject to high centrifugal loads due to high speed rotation, so that when the disk assembly is provided with blades, the disk assembly is easily disengaged due to the influence of axial forces.
In addition, because the applicable occasion of rim plate subassembly is harsh, its ubiquitous processing defect is that need be under the condition of guaranteeing the machining precision, accomplish the clamping of rim plate subassembly part many times, every dismouting all influences the precision of final part. The present invention has been developed in order to solve at least one of the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a wheel disc assembly and a five-axis machining method thereof.
The purpose of the invention can be realized by the following technical scheme:
one of the technical schemes of the invention provides a wheel disc assembly which comprises a wheel disc main body, wherein an annular mounting part is processed on the outer edge of the wheel disc main body, blade grooves for fixedly mounting blades are uniformly arranged on the mounting part at intervals along the circumferential direction, and a blade baffle plate for sealing one end of each blade groove and abutting against the blades is further arranged on the surface of one side of the mounting part.
Furthermore, through cylindrical holes are further processed at positions, close to the two ends, on the bottom surface of the blade groove, and the blades are installed in the blade groove through bolts matched with the cylindrical holes.
Furthermore, the wheel disc main body is also provided with a mounting groove for forming the end part of the cylindrical surface hole.
Still more preferably, the bottom surface of the mounting groove is a circular arc curved surface.
Furthermore, the blade groove is a cuboid groove.
Furthermore, the blade groove is arranged on the mounting part in the axial direction of the wheel disc main body in an inclined mode.
Furthermore, a central hole is processed at the central position of the wheel disc main body, and a central key groove is further processed at the central hole.
Furthermore, an arc inclined plane which is smoothly transited from the center of the wheel disc main body to the installation part is processed on the wheel disc main body.
The second technical scheme of the invention provides a five-axis machining method of a wheel disc assembly, which comprises the following steps:
(1) designing a processing program according to the contour dimension of a target product, and lathing a blank workpiece;
(2) clamping a blank workpiece on a five-axis numerical control machine tool workbench, and milling a central hole by adopting a cutter;
(3) adjusting the parameters of the cutter, and processing the outline of the front side of the wheel disc assembly;
(4) turning over and clamping the workpiece, and continuously processing the contour of the back along the tool path;
(5) then processing a contact surface assembled with the blade at the side surface of the wheel disc assembly;
(6) positioning the position of the contact surface by using a centering drill, and drilling a hole on the contact surface by using a twist drill;
(7) and (4) detaching the workpiece, inspecting, cleaning and warehousing to finish.
Further, in the step (2), when the center hole is milled, the center key groove at the center hole is machined in a plane milling mode, specifically: firstly, a cutter with the radius not more than 3mm is adopted to finish rough machining of the profile of the central key groove, then the cutter with the radius of 0.5mm is used to finish cleaning of the allowance of the central key groove, the boundary of a blank of a tool path needs to take one surface as the front surface to select the boundary of the central key groove, and the other surface is selected as the bottom surface.
Further, in the step (5), during processing, a milling mode of milling a milling cutter with the radius not more than 3mm and a bottom surface is adopted to finish the milling rough processing of the outline of the contact surface of the wheel disc assembly and the blade, and then the milling cutter with the radius of 0.5mm is adopted to clean the residual allowance on the processing wall surface.
Further, in the whole processing process, the maximum processing depth of each cutter in rough processing is 1mm, the maximum processing depth of finish processing is 0.3mm, the rotating speed is kept at 1200-1500rpm, and the feeding speed is kept at 350 mm/min.
Compared with the prior art, the invention has the following advantages:
(1) the blade baffle and the blade groove which is inclined to the axial direction of the wheel disc main body can be matched to improve the fixed installation effect of the blade, and the falling problem of the blade in the process of high-speed running along with the wheel disc is effectively prevented.
(2) The mounting groove in the shape of the arc curved surface can be used for leaving a space for mounting the bolt at the cylindrical surface hole on the premise of not influencing the strength of the original wheel disc as far as possible.
(3) The plane can be milled quickly and conveniently by adopting plane washing, the shape of a groove on the contact surface of a wheel disc blade is a cuboid, the plane washing starts to mill layer by layer with one side surface of the cuboid, the maximum depth of milling of each layer is adjusted to be 1mm, and a closed line segment is shown on each layer of a tool path track by a processing mode of washing a contour.
(4) The whole processing process can effectively reduce the processing error and improve the processing quality.
Drawings
FIG. 1 is a schematic front view of a wheel disc assembly;
FIG. 2 is a side schematic view of the wheel disc assembly;
the notation in the figure is:
1-central key groove, 2-central hole, 3-arc inclined plane, 4-arc curved surface, 5-mounting groove, 6-blade groove, 7-cylindrical surface hole and 8-blade baffle.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following embodiments, unless otherwise specified, functional components or processing techniques are all conventional components or techniques in the art for achieving the corresponding functions.
Example 1:
the wheel disc assembly structurally comprises a wheel disc main body, wherein an annular mounting part is processed on the outer edge of the wheel disc main body, blade grooves 6 for fixedly mounting blades are uniformly arranged on the mounting part at intervals along the circumferential direction, and a blade baffle 8 for sealing one end of each blade groove 6 and abutting against the blades is further mounted on the surface of one side of the mounting part. Through cylindrical holes 7 are further processed on the bottom surface of the blade groove 6 at positions close to the two ends, and blades are mounted in the blade groove 6 through bolts matched with the cylindrical holes 7. The main body of the wheel disc is also provided with a mounting groove 5 for leaving the end part of the cylindrical surface hole 7. The bottom surface of the mounting groove 5 is a circular arc curved surface 4. The blade groove 6 is a rectangular parallelepiped groove. The blade grooves 6 are inclined on the mounting portion in the axial direction of the disk body. A central hole 2 is processed at the central position of the wheel disc main body, and a central key groove 1 is further processed at the central hole 2. The wheel disc main body is also provided with an arc inclined plane 3 which smoothly transits from the center to the installation part.
Example 2
In order to implement the machining of the complex wheel disc assembly in embodiment 1, this embodiment provides a five-axis machining method, which specifically includes the following steps:
(1) firstly, selecting a required blank shape according to the size of a part, and then programming a program according to the outline of the part to turn the outline of the blank.
(2) And drawing a three-dimensional model of the part by utilizing UG software, selecting the three-dimensional model as a specified component in the work piece, selecting the processed blank as a specified blank in the work piece, and determining that the work piece can be directly used in the processing procedure.
(3) And machining a central key groove 1 of the wheel disc assembly part. Selecting a workbench component body by using a machining process of plane washing, selecting a specified component boundary as a front profile boundary of the central key groove 1, selecting a profile boundary symmetric surface for a specified bottom surface, finishing rough machining by using a milling cutter with the radius of 2mm, and finishing finish machining by using a milling cutter with the radius of 0.5 mm.
(4) The contour of the front surface of the component is generated by a machining process of surface washing, the boundary of the mounting groove 5 of the front surface of the component is used as a specified component boundary, then the bottom surface of the mounting groove 5 is used as a specified bottom surface, and whether the front surface of the component is correct or not is checked through confirmation simulation.
(5) And duplicating the finished mounting grooves 5 on the front surface in an array mode to finish other mounting grooves 5 on the front surface, wherein the radius of a rough machining cutter is 6mm, the radius of a finish machining cutter is 2mm, the rotating speed is 1300rpm, and the feeding speed is 300 mm/min.
(6) And (3) and (4) are used for finishing the cutter path machining of the reverse side, and in the process, the part needs to be detached and clamped again after being turned over in the actual machining.
(7) And (3) using a machining process of a bottom wall milling cutter, using the previously defined workpiece, then designating the bottom surface of the contact surface of the wheel disc and the blade as a designated part, also using the bottom surface of the contact surface as the bottom surface of a designated cutting area, selecting a good automatic wall, and finishing the generation of a tool path by using a milling cutter with the radius of 3 mm.
(8) Selecting a bottom wall milling process, selecting workbench, selecting the bottom surfaces of the designated part and the designated cutting area as the tops of the baffles, selecting an automatic wall, then using a milling cutter with the radius of 2mm to process the outline of the blade baffle 8, and confirming the simulated tool path track.
(9) And (5) continuing to finish the finish machining operation of the top of the blade baffle 8 by using a bottom wall milling cutter, selecting an automatic wall as the designated surface in the step (7), and finishing the path of a cutter by using a milling cutter with the radius of 2 mm.
(10) Selecting a workbench component body by using a machining process of plane washing, wherein the boundary of the specified component is an acute angle edge of a contact surface between a wheel disc and a blade, the specified bottom surface is a contact surface, a milling cutter with the radius of 0.5mm is used for finishing the cleaning tool path of the machining allowance of the contact surface in a layering way, and the maximum depth of each layer is 0.3mm for the quality of part machining.
(11) And selecting a workbench component body by using a machining process of plane washing, wherein the boundary of the component is an open-loop edge profile formed by the contact surface and the integral edge of the blade baffle plate 8, the bottom surface is a top plane of the blade baffle plate 8, and then, a milling cutter with the radius of 0.5mm is used for finishing the clearance of the blade baffle plate 8 and the semicircular wall allowance of the contact surface.
(12) And (3) selecting a workbench component body by using a drilling process, selecting the position of the hole to be processed, and finishing the processing tool path of the hole by using a drill tool with the diameter of 8.5 mm.
(13) And finally, duplicating the steps (6), (7), (8), (9), (10) and (11) in a circumferential array mode to finish the cutter path tracks of the contact surfaces of the blades of the rest of the wheel disc.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a rim plate subassembly, its characterized in that, includes the rim plate main part, and the outside edge processing of this rim plate main part has and is annular installation department, along the even interval arrangement in circumference on the installation department have the blade recess that is used for the fixed mounting blade, still install the blade baffle that seals blade recess one end and be used for supporting the blade on a side surface of installation department.
2. A wheel and disc assembly as claimed in claim 1, wherein the vane recess is further formed with cylindrical holes therethrough at locations on the bottom surface thereof adjacent the ends thereof, and the vanes are mounted in the vane recess by bolts which mate with the cylindrical holes.
3. A wheel disc assembly as claimed in claim 2, in which the wheel disc body is further formed with a mounting recess which is formed to leave a position of the end of the cylindrical bore.
4. A wheel and disc assembly as claimed in claim 3, wherein the bottom surface of the mounting recess is curved.
5. A wheel disc assembly as claimed in claim 1 or claim 2, in which the vane recess is a rectangular parallelepiped recess.
6. A wheel disc assembly as claimed in claim 1 or claim 2, in which the vane recesses are inclined on the mounting portion axially of the wheel disc body.
7. A wheel disc assembly as claimed in claim 1, wherein the wheel disc body is provided with a central aperture centrally formed therein and a central keyway centrally formed therein.
8. A wheel disc assembly as claimed in claim 1, in which the wheel disc body is further formed with an arcuate ramp surface which smoothly transitions from its centre to the mounting portion.
9. A method of five axis machining of a wheel disc assembly according to any one of claims 1 to 8, including the steps of:
(1) designing a processing program according to the contour dimension of a target product, and lathing a blank workpiece;
(2) clamping a blank workpiece on a five-axis numerical control machine tool workbench, and milling a central hole by adopting a cutter;
(3) adjusting the parameters of the cutter, and processing the outline of the front side of the wheel disc assembly;
(4) turning over and clamping the workpiece, and continuously processing the contour of the back along the tool path;
(5) then processing a contact surface assembled with the blade at the side surface of the wheel disc assembly;
(6) positioning the position of the contact surface by using a centering drill, and drilling a hole on the contact surface by using a twist drill;
(7) and (4) detaching the workpiece, inspecting, cleaning and warehousing to finish.
10. The five-axis machining method for the wheel disc assembly according to claim 9, wherein in the step (2), when the central hole is milled, the machining of the central key groove at the central hole is completed in a planar milling mode, and specifically, the machining method comprises the following steps: firstly, roughly machining the outline of the central key groove by using a cutter with the radius not more than 3mm, then cleaning the allowance of the central key groove by using a cutter with the radius of 0.5mm, wherein one side of the blank boundary of the tool path is used as the front side to select the boundary of the central key groove, and the other side of the blank boundary is used as the bottom side;
in the step (5), during processing, firstly, a milling cutter with the radius not more than 3mm and a bottom milling processing mode are adopted to finish the milling rough processing of the outline of the contact surface of the wheel disc assembly and the blade, and then a milling cutter with the radius of 0.5mm is adopted to clean the residual allowance on the processing wall surface;
in the whole processing process, the maximum processing depth of each cutter in rough processing is 1mm, the maximum processing depth of finish processing is 0.3mm, the rotating speed is kept at 1200-1500rpm, and the feeding speed is kept at 350 mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010361357.8A CN111456815A (en) | 2020-04-30 | 2020-04-30 | Wheel disc assembly and five-axis machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010361357.8A CN111456815A (en) | 2020-04-30 | 2020-04-30 | Wheel disc assembly and five-axis machining method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111456815A true CN111456815A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010361357.8A Pending CN111456815A (en) | 2020-04-30 | 2020-04-30 | Wheel disc assembly and five-axis machining method thereof |
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