CN116652520A - Milling method for turbine blade of marine supercharger - Google Patents
Milling method for turbine blade of marine supercharger Download PDFInfo
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- CN116652520A CN116652520A CN202310301772.8A CN202310301772A CN116652520A CN 116652520 A CN116652520 A CN 116652520A CN 202310301772 A CN202310301772 A CN 202310301772A CN 116652520 A CN116652520 A CN 116652520A
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Abstract
The invention relates to the technical field of turbochargers, in particular to a milling method for turbine blades of a marine supercharger, which comprises the steps of milling blanks to remove allowance based on size requirements, milling a locating surface of a tool and drilling a center hole to obtain turbine blades; rough milling the blade body of the turbine blade, and performing heat treatment on the rough-milled turbine blade to obtain a treated blade; finish milling the processing blade based on the size requirement, and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled processing blade to obtain a semi-finished turbine blade; flaw detection is carried out on the semi-finished turbine blade, and the semi-finished turbine blade which is qualified in detection is carved to obtain the finished turbine blade.
Description
Technical Field
The invention relates to the technical field of turbochargers, in particular to a milling method for turbine blades of a marine supercharger.
Background
In recent years, with the change of international situation, the marine manufacturing industry in China is rapidly developing. As an important component of a marine diesel engine of a marine main power unit, the technical level of a marine turbocharger directly affects the working efficiency of the marine diesel engine, which also brings opportunities and adjustments to the development of companies. The turbine blade is a power source of the turbocharger and is one of the most core parts, and the quality of the turbine blade directly influences the performance of the turbocharger.
Compared with the traditional precisely cast turbine blade, the turbine blade of the marine turbocharger is better in blade body consistency, better in blade body surface finish and higher in requirements on the machining process due to the fact that nickel, chromium and Monel alloy are adopted as difficult-to-machine materials. Structurally, the blade body is a typical free-form surface thin-wall part, milling difficulty is high, and the traditional clamping and positioning mode can not meet the high-precision requirement of the blade.
Disclosure of Invention
The invention aims to provide a milling method for turbine blades of a marine supercharger, and aims to solve the problem that the traditional clamping and positioning processing mode can not meet the high-precision requirement of the blades.
In order to achieve the above purpose, the invention provides a milling method for turbine blades of a marine supercharger, which comprises the following steps:
milling the blank to remove allowance based on the size requirement, milling a locating surface of the tool and drilling a center hole to obtain a turbine blade;
rough milling the blade body of the turbine blade, and performing heat treatment on the rough-milled turbine blade to obtain a treated blade;
finish milling the processing blade based on the size requirement, and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled processing blade to obtain a semi-finished turbine blade;
and flaw detection is carried out on the semi-finished turbine blade, and the semi-finished turbine blade which is qualified in detection is carved to obtain the finished turbine blade.
The method comprises the following steps of milling a blank to remove allowance based on the size requirement, milling a locating surface of a tool, and drilling a center hole to obtain a specific mode of the turbine blade:
milling the allowance of the blank by using a numerical control machine tool based on the size requirement, and milling a locating surface of the tool;
and (5) drilling a center hole in the blank on which the positioning surface of the tool is milled to obtain the turbine blade.
The method comprises the steps of rough milling a blade body of a turbine blade, and carrying out heat treatment on the rough-milled turbine blade to obtain a specific mode of treating the blade:
clamping the turbine blade, supporting the central hole, and rough milling the blade body of the turbine blade;
and carrying out heat treatment on the turbine blade after rough milling, and removing stress to obtain the treated blade.
The method comprises the steps of finish milling the processing blade based on the size requirement, sequentially performing wire cutting, powerful grinding and shot blasting operation on the finish-milled processing blade, and obtaining a semi-finished turbine blade in a specific mode:
finish milling the processing blade based on the size requirement to obtain a finish-milled turbine blade;
and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled turbine blade to obtain a semi-finished turbine blade.
Wherein, based on the size demand finish milling the processing blade, obtain the concrete mode of finish milling turbine blade:
finish milling the processing blade airfoil based on the dimensional requirements;
finish milling the process blade intermediate shroud based on the dimensional requirements;
and milling planes of two side surfaces of the air outlet and an oblique angle of 19 degrees based on the size requirement to obtain the finish milling turbine blade.
According to the milling method for the turbine blade of the marine supercharger, the blank is milled to remove allowance based on the size requirement, a locating surface of the tool is milled, and a center hole is drilled, so that the turbine blade is obtained; rough milling the blade body of the turbine blade, and performing heat treatment on the rough-milled turbine blade to obtain a treated blade; finish milling the processing blade based on the size requirement, and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled processing blade to obtain a semi-finished turbine blade; the method can effectively solve the problems of milling deformation, unified blade body and tenon tooth datum and poor processing consistency in the process of processing the turbine blade by optimizing a feed track, processing parameters, designing a special tool measuring tool and the like, and solves the problem that the traditional clamping and positioning processing mode can not meet the high-precision requirement of the blade.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a milling method for turbine blades of a marine supercharger.
Fig. 2 is a schematic diagram of milling off the remainder of a blank and milling out the locating surface of the tool using a numerically controlled machine tool based on dimensional requirements.
Fig. 3 is a schematic illustration of the drilling of a center hole into a blank from which the locating surface of the tool is milled.
FIG. 4 is a schematic illustration of clamping the turbine blade against a central bore to roughen the turbine blade body.
FIG. 5 is a schematic illustration of the process blade finish milling based on dimensional requirements.
Fig. 6 is a schematic view of the sequential wire cutting of the finish-milled turbine blade.
FIG. 7 is a schematic illustration of the finishing turbine blade peening operation.
Fig. 8 is a schematic diagram of a milling process card 1 for a turbine blade of a marine supercharger.
Fig. 9 is a schematic diagram of a milling process card 2 for a turbine blade of a marine supercharger.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Referring to fig. 1 to 9, the invention provides a method for milling turbine blades of a marine supercharger, which comprises the following steps:
s1, milling a blank to remove allowance based on the size requirement, milling a locating surface of a tool, and drilling a center hole to obtain a turbine blade;
the specific mode is as follows:
s11, milling the allowance of a blank by using a numerical control machine tool based on the size requirement, and milling a locating surface of the tool;
specifically, according to the size requirement of the drawing, a numerical control milling machine is adopted to mill the square stock blank to a large margin, and a locating surface of the tool is milled, so that the follow-up clamping and alignment on the tool are facilitated.
And S12, drilling a center hole in the blank milled with the locating surface of the tool to obtain the turbine blade.
Specifically, according to the theoretical position size of the center hole in the drawing, the center hole is drilled, so that the blade body datum and the tenon tooth datum are unified, and in order to avoid the problems of vibration and the like in the milling process, the part is required to be in a clamping mode of clamping one part by one part, so that the center hole for supporting the center is processed in the working procedure.
S2, roughly milling the blade body of the turbine blade, and carrying out heat treatment on the roughly milled turbine blade to obtain a treated blade;
the specific mode is as follows:
s21, clamping the turbine blade, supporting the center hole, and rough milling the blade body of the turbine blade;
specifically, a special milling tool is used for clamping the turbine blade, a top center hole is formed, and a fixed-axis rough cutting and four-axis linkage milling mode is adopted for milling the turbine blade body (the whole profile of the blade body leaves a machining allowance of 1 mm).
S22, performing heat treatment on the rough-milled turbine blade, and removing stress to obtain a treated blade.
Specifically, the rough-milled blade is subjected to heat removal treatment, milling stress is removed, and deformation of the thinner position of the blade edge after finish milling is avoided.
S3, finish milling the processing blade based on the size requirement, and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled processing blade to obtain a semi-finished turbine blade;
the specific mode is as follows:
s31, finish milling the processing blade based on the size requirement to obtain a finish-milled turbine blade;
specifically, the process is a key process in the processing process of the turbine blade, the turbine blade is clamped by adopting a special tool, the processing of other structures except for the tenon tooth is completed in a one-time clamping state, meanwhile, the clamping chuck for clamping is reserved, the theoretical center of the clamping chuck is unified with the center line of the blade body and the tenon tooth, and the three-coordinate detection can be used for establishing a reference, so that the detection efficiency and the detection precision are improved.
S311, finish milling the blade body of the processing blade based on the size requirement;
s312 finish milling the process blade intermediate shroud based on the dimensional requirements;
specifically, the intermediate shroud refers to the portion between the blade body and the dovetail.
S313, milling out planes of two side surfaces of the air outlet and a bevel angle of 19 degrees based on the size requirement, and obtaining the finish milling turbine blade.
S32, sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled turbine blade to obtain a semi-finished turbine blade.
Specifically, a special blade body clamping tool is adopted, a wire cutting technology is adopted, 73.5-degree inclination of a process chuck where a center hole is located and a tenon tooth cutting position is removed, and the process acts as follows: the turbine blade is machined by other structures except the tenon tooth which is not machined. Cutting 73.5 is in order to reduce the blank department surplus of tenon tooth, can shorten the processing time of follow-up powerful mill tenon tooth, promotes machining efficiency, adopts special tenon tooth grinding tool clamping turbine blade uses the dedicated buddha's warrior attendant gyro wheel of mill tenon tooth to process, and first spare sends three-dimensional projection to detect, and this process effect: finishing the processing of the blade root tenon tooth of the turbine blade, and respectively carrying out surface shot blasting strengthening treatment on the blade body and tenon tooth of the turbine blade according to different shot blasting requirements, wherein the working procedure has the following effects: the shot blasting can play a role in strengthening the surface and removing residual stress, so that the service performance of the turbine blade is improved, the blade body and the blade root tenon teeth are respectively shot blasted when attention is required, and the carved surface is required to be protected on the carved surface of the shot blasting blade root tenon teeth.
S4, flaw detection is conducted on the semi-finished turbine blade, and the semi-finished turbine blade which is qualified in detection is engraved, so that a finished turbine blade is obtained.
Specifically, visual inspection and fluorescence penetration detection are carried out on the turbine blade, and the working procedure acts as follows: in order to ensure that the turbine blade meets the use requirement after the processing is finished, the appearance of the blade is required to be checked, and the defects such as cracks, pits and the like are not allowed to exist; meanwhile, by using fluorescence penetration flaw detection, whether defects such as cracks and empty holes exist in the turbine blade can be detected, and the specification brevity codes can be carved on the carved character surfaces of the turbine blade according to the drawing requirements, so that the tracing is convenient.
The above disclosure is merely illustrative of a preferred embodiment of a method for milling turbine blades of a turbocharger for a ship, and it is not intended to limit the scope of the invention, and those skilled in the art will understand that all or part of the above embodiments may be implemented, and equivalent changes may be made thereto, while still remaining within the scope of the invention.
Claims (5)
1. The milling method for the turbine blade of the marine supercharger is characterized by comprising the following steps of:
milling the blank to remove allowance based on the size requirement, milling a locating surface of the tool and drilling a center hole to obtain a turbine blade;
rough milling the blade body of the turbine blade, and performing heat treatment on the rough-milled turbine blade to obtain a treated blade;
finish milling the processing blade based on the size requirement, and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled processing blade to obtain a semi-finished turbine blade;
and flaw detection is carried out on the semi-finished turbine blade, and the semi-finished turbine blade which is qualified in detection is carved to obtain the finished turbine blade.
2. A method of milling a turbocharger turbine blade for a ship, as claimed in claim 1,
the blank is milled to remove allowance based on the size requirement, a tool positioning surface is milled and a center hole is drilled, and the specific mode of the turbine blade is obtained:
milling the allowance of the blank by using a numerical control machine tool based on the size requirement, and milling a locating surface of the tool;
and (5) drilling a center hole in the blank on which the positioning surface of the tool is milled to obtain the turbine blade.
3. A method of milling a turbocharger turbine blade for a ship, as claimed in claim 1,
the rough milling of the turbine blade body and the heat treatment of the rough milled turbine blade are carried out to obtain a specific mode of processing the blade:
clamping the turbine blade, supporting the central hole, and rough milling the blade body of the turbine blade;
and carrying out heat treatment on the turbine blade after rough milling, and removing stress to obtain the treated blade.
4. A method of milling a turbocharger turbine blade for a ship, as claimed in claim 1,
the method comprises the steps of finish milling the processing blade based on the size requirement, and sequentially performing wire cutting, powerful grinding and shot blasting operation on the finish-milled processing blade to obtain a semi-finished turbine blade in a specific mode:
finish milling the processing blade based on the size requirement to obtain a finish-milled turbine blade;
and sequentially performing wire cutting, powerful grinding and shot blasting on the finish-milled turbine blade to obtain a semi-finished turbine blade.
5. A method of milling a turbocharger turbine blade for a ship, as claimed in claim 4,
the processing blade is finely milled based on the size requirement, and a specific mode of finely milling the turbine blade is obtained:
finish milling the processing blade airfoil based on the dimensional requirements;
finish milling the process blade intermediate shroud based on the dimensional requirements;
and milling planes of two side surfaces of the air outlet and an oblique angle of 19 degrees based on the size requirement to obtain the finish milling turbine blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310301772.8A CN116652520A (en) | 2023-03-27 | 2023-03-27 | Milling method for turbine blade of marine supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310301772.8A CN116652520A (en) | 2023-03-27 | 2023-03-27 | Milling method for turbine blade of marine supercharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116652520A true CN116652520A (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310301772.8A Pending CN116652520A (en) | 2023-03-27 | 2023-03-27 | Milling method for turbine blade of marine supercharger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118060857A (en) * | 2024-04-25 | 2024-05-24 | 上海开维喜阀门有限公司 | Processing technology of valve rod of lifting rod ball valve |
-
2023
- 2023-03-27 CN CN202310301772.8A patent/CN116652520A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118060857A (en) * | 2024-04-25 | 2024-05-24 | 上海开维喜阀门有限公司 | Processing technology of valve rod of lifting rod ball valve |
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