CN111745360A - Machining method for casting impeller of blade blower - Google Patents
Machining method for casting impeller of blade blower Download PDFInfo
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- CN111745360A CN111745360A CN202010656895.XA CN202010656895A CN111745360A CN 111745360 A CN111745360 A CN 111745360A CN 202010656895 A CN202010656895 A CN 202010656895A CN 111745360 A CN111745360 A CN 111745360A
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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
- B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
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Abstract
The invention discloses a processing method for casting a blade blower impeller, which comprises the following steps: rough machining of the big end and the blade tip; pre-balance measurement; carrying out eccentric turning according to the pre-balance measurement result; fine machining of the big end, the small end and the blade tip; and (5) measuring dynamic balance. By adopting the processing method of the cast impeller of the blade blower, the unbalance amount of the parts is reduced and the qualification rate of the parts is improved by reasonably arranging the sequence of the part processing procedures and adding the procedures of pre-balance measurement and eccentric turning. And the procedures of pre-balancing and eccentric turning are arranged between rough machining and finish machining, so that the possibility of final scrapping of the impeller of the air blower during machining is reduced, the balance quantity of the parts is pre-judged in advance, the production risk is reduced, the out-of-tolerance parts are rescued to a certain extent by taking measures in advance, and the scrappage of the parts is greatly reduced.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a machining method for casting a blade blower impeller.
Background
The blower impeller is a core component of an aircraft engine, is also a main functional part and a key life part of a compressor component, and has the main function of introducing airflow. Because the part is the rotating member, so have dynamic balance requirement. Considering the service life of parts, the part of the engine is scrapped because the unbalance of the parts is overlarge due to large blade casting tolerance according to the blower impeller adopting integrally cast blades.
At present, a method for processing a blower impeller roughly comprises the following steps: blank, turning a process table, drilling, turning a small end, turning a blade tip, turning a large end face inclined plane and dynamically balancing. However, since the part has a surface of more than 70% as a casting surface, the casting precision is low, the tolerance is large, and it is difficult to satisfy the dynamic balance requirement of the final part, and since the dynamic balance process is performed after the whole machining of the part is completed, whether the part satisfies the balance requirement can be revealed in the final process, which cannot be predicted in advance, and once the balance requirement is not satisfied, the production task is quite passive.
In summary, how to effectively solve the problems that the machining process is wasted due to the fact that the cast blade blower impeller is prone to being finally scrapped and the like is a problem to be solved by technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention provides a method for machining a cast blade blower impeller, which can effectively solve the problem that the machining process is wasted due to the final scrap of the cast blade blower impeller.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of manufacturing a cast leaf blower impeller comprising:
rough machining of the big end and the blade tip;
pre-balance measurement;
carrying out eccentric turning according to the pre-balance measurement result;
fine machining of the big end, the small end and the blade tip;
and (5) measuring dynamic balance.
Preferably, in the method for machining a cast impeller of a vane blower, the rough machining of the large end and the tip specifically includes:
roughly turning a large end of the blank after processing and drilling by the process platform;
roughly turning the blade tip.
Preferably, in the above method for machining a cast impeller of a vane blower, the rough turning of the large end includes:
preparing a blank;
turning a process table;
drilling;
and (4) cutting a process table.
Preferably, in the machining method of the cast impeller of the vane blower, the finish machining of the large end, the small end and the tip specifically includes:
finely turning the small end;
finely turning the big end;
and finely turning the blade tip.
Preferably, in the machining method of the cast blade blower impeller, the performing of the eccentric lathe according to the pre-balance measurement result specifically includes:
calculating the eccentricity of the part according to the unbalance of the part measured in the pre-balance way;
and correcting the deviation of the part towards the eccentric direction according to the eccentric amount of the part.
Preferably, the correcting the eccentricity of the part in the eccentricity direction according to the eccentricity of the part specifically includes:
and adjusting the position of the part to enable the runout of the inner hole surface of the measured part to be 2 times of the eccentricity e, and turning the inner hole to correct the eccentricity.
The method for processing the cast impeller of the blade blower is applied, and the rough processing of the large end and the blade tip is firstly carried out; then, pre-balance measurement is carried out; carrying out eccentric turning according to the pre-balance measurement result; then, carrying out finish machining on the big end, the small end and the blade tip; and finally, carrying out dynamic balance measurement. In conclusion, the machining method for casting the impeller of the blade blower provided by the invention reduces the unbalance amount of the parts and improves the qualification rate of the parts by reasonably arranging the sequence of the part machining processes and adding the pre-balance measurement and eccentric turning processes. And the pre-balance measurement and eccentric turning process is arranged between rough machining and finish machining, so that the possibility of final scrapping of the impeller of the air blower during machining is reduced, the balance quantity of the part is pre-judged in advance, the production risk is reduced, the out-of-tolerance part is saved to a certain extent by taking measures in advance, and the scrappage of the part is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method of manufacturing a cast blade blower wheel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a middle blank;
FIG. 3 is a schematic structural view of a lathe table;
FIG. 4 is a schematic view of a borehole configuration;
FIG. 5 is a schematic structural view of a cutting table;
FIG. 6 is a schematic structural view of a rough turned large end;
FIG. 7 is a schematic view of the rough turning of the blade tip;
FIG. 8 is a schematic diagram of a pre-balance measurement configuration;
FIG. 9 is a schematic view of the structure of the eccentric vehicle;
FIG. 10 is a schematic view of a finish-turned small end;
FIG. 11 is a schematic structural view of a finish-turned large end;
FIG. 12 is a schematic view of a finish turned blade tip configuration;
fig. 13 is a schematic structural view of dynamic balance measurement.
Detailed Description
The embodiment of the invention discloses a method for machining a cast blade blower impeller, which is used for pre-judging the balance of parts in advance and reducing the production risk and the rejection rate of the parts.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for manufacturing a cast blade blower wheel according to an embodiment of the present invention.
In one embodiment, the present invention provides a method of manufacturing a cast impeller for a vane blower, comprising the steps of:
s1: rough machining of the big end and the blade tip;
the roughing is first performed, which typically includes roughing the large end and tip of the impeller. Specifically, the rough blank after being processed and drilled by the process table can be roughly turned to the large end firstly, and then roughly turned to the blade tip.
Specifically, the rough turning of the large end comprises the following steps:
preparing a blank;
turning a process table;
drilling;
and (4) cutting a process table.
Namely, the rough blank processed and drilled by the process table is subjected to the process of rough turning of the large end after the rough blank is subjected to the process table turning, the process table drilling and the process table cutting. The processing precision of the process table is improved through the process steps of turning the process table and cutting the process table. For the detailed process operations of the blank, the turning of the process table, the drilling and the cutting of the process table, reference is made to the corresponding procedures in the prior art, which are not described herein again.
S2: pre-balance measurement;
after rough machining, a primary structure of the impeller is obtained, and then pre-balance measurement is carried out, namely, dynamic balance measurement is carried out in advance after rough machining, so that whether the part is eccentric or not is evaluated, and the unbalance of the part is obtained. As shown in fig. 8, the left and right sides of the part are respectively provided with the left support frame 2 and the right support frame 1 to support the part, and the part is driven to rotate by driving, if the part has unbalanced mass, an inertia force is generated, and a horizontal component of the inertia force generates a horizontal vibration signal on the left support frame 2 and the right support frame 1. For a specific method of pre-balance measurement, reference is made to conventional dynamic balance measurement techniques, which are not described herein again.
S3: carrying out eccentric turning according to the pre-balance measurement result;
through pre-balance measurement, the unbalance amount of the part is obtained, and then eccentric turning is carried out according to the unbalance amount so as to correct eccentricity. Specifically, step S3 includes:
calculating the eccentricity of the part according to the unbalance of the part measured in the pre-balance way;
and correcting the deviation of the part towards the eccentric direction according to the eccentric amount of the part.
Specifically, the eccentricity is calculated according to the unbalance of the part, and when the unbalance of the part is recorded as m and the eccentricity of the part is recorded as e, the formula is defined as follows:
e＝m*R/M
wherein R is the radius of the balance correction surface, and M is the weight of the part.
The eccentricity of the part is obtained through calculation of the formula, the part can be corrected in the key direction according to the eccentricity, the runout of the inner hole surface of the part is measured by striking a meter and is 2 times of the eccentricity e, and the key direction is the point with more pressure meters. The method is characterized in that the method comprises the steps of calculating the eccentricity of a workpiece, performing correction on the eccentricity, measuring the runout of the inner hole surface of the workpiece to be 2 times of the eccentricity e by using a meter, enabling the actual center of the workpiece to be collinear with the rotation center of a machine tool, and turning the inner hole to correct the eccentricity.
S4: fine machining of the big end, the small end and the blade tip;
and correcting the eccentricity through the procedures of pre-balance measurement and eccentric turning, and then performing subsequent finish machining to obtain a final product. Specifically, the finish machining of main aspects, tip and tip includes:
finely turning the small end;
finely turning the big end;
and finely turning the blade tip.
Namely, finish turning is carried out according to the sequence of the small end, the large end and the blade tip so as to ensure the finish machining quality.
S5: and (5) measuring dynamic balance.
And finally, performing dynamic balance measurement to detect whether the dynamic balance requirement is met. As shown in fig. 13, the left and right sides of the part are respectively provided with the left support frame 2 and the right support frame 1 to support the part, and the part is driven to rotate by driving, if the part has unbalanced mass, an inertia force is generated, and a horizontal component of the inertia force generates a horizontal vibration signal on the left support frame 2 and the right support frame 1. For the specific operation of the dynamic balance measurement, please refer to the prior art, which is not described herein.
In a preferred embodiment, the processing method for casting the impeller of the vane blower, provided by the invention, comprises the following steps: blank-turning process table-drilling-cutting process table-roughly turning large end-roughly turning blade tip-pre-balancing measurement-eccentrically turning-finely turning small end-finely turning large end-finely turning blade tip-dynamic balancing measurement. Please refer to fig. 2-13 for the processing structure of each step.
By applying the processing method for casting the impeller of the blade blower, provided by the invention, the unbalance amount of the part is reduced and the qualification rate of the part is improved by reasonably arranging the sequence of the part processing procedures and adding the procedures of pre-balance measurement and eccentric turning. And the pre-balance measurement and eccentric turning process is arranged between rough machining and finish machining, so that the possibility of final scrapping of the impeller of the air blower during machining is reduced, the balance quantity of the part is pre-judged in advance, the production risk is reduced, the out-of-tolerance part is saved to a certain extent by taking measures in advance, and the scrappage of the part is greatly reduced. Through test and actual production verification, after the pre-balance measurement and the eccentric vehicle are added, the unbalance amount of the part is greatly reduced, and the rejection rate of the part is reduced from 25% to 5%.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A machining method for casting a blade blower impeller is characterized by comprising the following steps:
rough machining of the big end and the blade tip;
pre-balance measurement;
carrying out eccentric turning according to the pre-balance measurement result;
fine machining of the big end, the small end and the blade tip;
and (5) measuring dynamic balance.
2. The method of machining a cast impeller for a vane blower of claim 1 wherein the rough machining of the large end and the tip specifically includes:
roughly turning a large end of the blank after processing and drilling by the process platform;
roughly turning the blade tip.
3. The method of machining a cast vane blower wheel as claimed in claim 2 wherein the rough turning of the large end is preceded by:
preparing a blank;
turning a process table;
drilling;
and (4) cutting a process table.
4. The method of claim 1, wherein the fine machining of the large end, the small end and the blade tip specifically comprises:
finely turning the small end;
finely turning the big end;
and finely turning the blade tip.
5. The method of machining a cast vane blower wheel as claimed in any one of claims 1 to 4 wherein the eccentric turning according to the pre-balancing result specifically comprises:
calculating the eccentricity of the part according to the unbalance of the part measured in the pre-balance way;
and correcting the deviation of the part towards the eccentric direction according to the eccentric amount of the part.
6. The machining method for casting the impeller of the vane blower according to claim 5, wherein the step of correcting the eccentricity of the part according to the eccentricity of the part specifically comprises:
and adjusting the position of the part to enable the runout of the inner hole surface of the measured part to be 2 times of the eccentricity e, and turning the inner hole to correct the eccentricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010656895.XA CN111745360A (en) | 2020-07-09 | 2020-07-09 | Machining method for casting impeller of blade blower |
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| CN202010656895.XA CN111745360A (en) | 2020-07-09 | 2020-07-09 | Machining method for casting impeller of blade blower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113146154A (en) * | 2021-04-12 | 2021-07-23 | 徐州新大隆化工泵业制造有限公司 | Processing technology of connecting rod of high-pressure plunger pump |
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