CN110293253B - Cycloid milling rough machining method for engine case parts - Google Patents
Cycloid milling rough machining method for engine case parts Download PDFInfo
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- CN110293253B CN110293253B CN201910551425.4A CN201910551425A CN110293253B CN 110293253 B CN110293253 B CN 110293253B CN 201910551425 A CN201910551425 A CN 201910551425A CN 110293253 B CN110293253 B CN 110293253B
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- 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
- B23C3/28—Grooving workpieces
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Abstract
The invention discloses a cycloid rough milling method for engine case parts, which comprises the following steps: firstly, carrying out region division on a casing part to be processed according to boss characteristics; step two, cycloidal milling is carried out on the divided areas to open a cutter-releasing groove; step three, carrying out cycloid milling on the region with the lower cutter groove; and step four, performing cycloid milling on the remaining unprocessed areas around the boss. According to the method, during rough machining of the casing, the material allowance is removed by adopting a cycloid milling mode as much as possible, a large engagement angle between groove milling and side milling in a closed area is avoided, the heat dissipation condition of the cutter is improved, the abrasion speed of the cutter can be reduced to the maximum extent, and the machining efficiency of the casing parts is improved.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a cycloid rough milling method for engine case parts.
Background
The rough milling processing of traditional machine casket external surface, what adopt to semi-enclosed region is the side milling processing mode, in order to guarantee higher machining efficiency, adopts big radial depth of cut, and the processing strategy of less feeding, such processing mode leads to cutter and work piece meshing angle big, and the mechanical load that the cutter received is big, and great meshing region leads to the heat dissipation not good simultaneously, has aggravated the wearing and tearing of cutter. For the closed area, a groove milling processing mode is firstly adopted to process a lower cutter groove, and after the lower cutter groove is opened, a side milling mode is adopted to process. In the groove milling process, the wrap angle of the cutter reaches 180 degrees, the cutter load is large, the heat dissipation performance is poor, and the cutter is more seriously worn.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a cycloid rough milling method for engine case parts, and aims to reduce the load of a cutter, improve the heat dissipation performance of the cutter and prolong the service life of the cutter.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a cycloid rough milling method for engine case parts comprises the following steps:
firstly, carrying out region division on a casing part to be processed according to boss characteristics;
step two, cycloidal milling is carried out on the divided areas to open a cutter-releasing groove;
step three, carrying out cycloid milling on the region with the lower cutter groove;
and step four, performing cycloid milling on the remaining unprocessed areas around the boss.
Further, in the first step, according to the specific position of the boss, the area between two adjacent bosses is divided into one area.
Further, in the first step, the boundary of the divided region coincides with the boundary of the boss.
Further, in the second step, when the cutter descending groove is opened, the boundary of the cutter descending groove is overlapped with the boundary of the boss.
Further, the width of the cutter descending groove is not less than 2-3 times of the diameter of the cutter.
Further, in the third step, during the cycloid milling, the lower tool point of the tool is located in the lower tool groove.
Further, in the third step, the lower tool point of the tool is located in the middle of the lower tool groove.
Further, in the fourth step, when the unprocessed region is processed, the lower tool point of the tool is located in the processed region in the third step.
Further, in the fourth step, the lower tool point of the tool is located in the middle of the boundary of the unprocessed region.
Furthermore, during the cycloid milling, the cutting speed of the cycloid milling is 100-150 m/min, and the feeding speed is 600-1000 mm/min.
Compared with the prior art, the invention has at least the following beneficial effects: according to the method, during rough machining of the case, firstly, cycloid machining areas are divided according to the bosses, a cutter slot is milled in each divided area in a cycloid mode, then the machining mode that the area is milled in the cycloid mode is adopted, the remaining unmachined area around the boss is also milled in the cycloid mode, the material allowance is removed in the whole machining process in the cycloid milling mode, the large engagement angle of groove milling and side milling machining is avoided, meanwhile, the heat dissipation condition of the cutter is improved, the abrasion speed of the cutter can be reduced to the maximum extent, and the machining efficiency of parts such as the case is improved.
Furthermore, the boundary of the divided area is overlapped with the boundary of the boss, so that the residual margin of the periphery of the boss is minimum, the cycloid machining area is maximum, the heat dissipation condition of the cutter is further improved, the abrasion speed of the cutter can be reduced to the maximum extent, and the machining efficiency of the casing type parts is improved.
Further, the width of the cutter groove is not less than 2-3 times of the diameter of the cutter, so that the cutter is guaranteed to have good chip removal and heat dissipation performance.
Furthermore, the cutter lowering point of the cutter is positioned in the middle of the cutter lowering groove, so that the cutter pricking phenomenon in the cutter lowering process is avoided to the maximum extent.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view schematically illustrating a forward and aft mold for roughing a casing;
FIG. 2 is a sectional view of a casing profile cycloid milling area according to the present invention;
FIG. 3 is a schematic view of a lower cutter slot of the cycloid milling machine of the present invention;
FIG. 4 is a schematic view of the profile of the cycloid milling casing of the present invention;
figure 5 is the remaining area around the cycloid milling boss feature of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
Fig. 1 schematically shows a front view and a rear view of a rough machined model of a typical casing, the blank before rough machining being a turned part, the outline of which is shown by a dotted line in fig. 1, and the profile of the casing after rough machining having three boss features, boss 1, boss 2 and boss 3.
In a preferred embodiment of the present invention, a method for machining an engine case part by cycloidal rough milling comprises the following steps:
firstly, carrying out region division on a casing part to be processed according to boss characteristics; the specific method comprises the following steps: dividing an area between two adjacent bosses into an area according to the specific positions of the bosses, wherein the boundary of the divided area is superposed with the boundary of the bosses;
referring to step one, as shown in fig. 2, the casing profile is divided into 3 regions, region 1, region 2 and region 3. The left boundary of region 1 coincides with the right boundary of boss 1 and the right boundary of region 1 coincides with the left boundary of boss 2. Similarly, the left boundary of the area 2 coincides with the right boundary of the boss 2, and the right boundary of the area 2 coincides with the left boundary of the boss 3; the left boundary of the area 3 is overlapped with the right boundary of the boss 3, and the right boundary of the area 3 is overlapped with the left boundary of the boss 1;
step two, carrying out cycloidal milling grooving processing on the divided areas to form a lower cutter groove for the subsequent cycloidal milling casing molded surface; the specific method comprises the following steps: when the cutter groove is opened, as shown in fig. 3, the boundary of the cutter groove should coincide with the boundary of the boss, fig. 3 is a schematic diagram of the position of the cutter groove and the track of the corresponding cycloid cutter groove, and preferably, the width of the cutter groove is not less than 2-3 times of the diameter of the cutter;
step three, carrying out cycloid milling on the region with the lower cutter groove; the specific method comprises the following steps: during the cycloid milling, as shown in fig. 4, the lower cutting point of the cutter is to be located in a lower cutter groove which is formed in advance, fig. 4 is a schematic diagram of a profile track of a cycloid milling casing, and preferably, the lower cutting point of the cutter is located in the middle of the lower cutter groove;
step four, carrying out cycloid milling on the remaining unprocessed areas around the boss; the specific method comprises the following steps: when the unprocessed area is processed, as shown in fig. 5, the cycloid lower cutting point of the tool is located in the processed area in step three, and fig. 5 is a schematic diagram of the remaining area around the cycloid milling boss feature, and preferably, the cycloid lower cutting point of the tool is located in the middle of the boundary of the unprocessed area.
When the cycloid milling machine is used for processing, the cutting speed of the cycloid milling machine is 100-150 m/min, and the feeding speed is 600-1000 mm/min.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The cycloid rough milling method for the engine case parts is characterized by comprising the following steps of:
firstly, carrying out region division on a casing part to be processed according to boss characteristics;
step two, cycloidal milling is carried out on the divided areas to open a cutter-releasing groove;
step three, carrying out cycloid milling on the region with the lower cutter groove;
step four, carrying out cycloid milling on the remaining unprocessed areas around the boss;
in the first step, the area between two adjacent bosses is divided into an area according to the specific positions of the bosses;
in the first step, the boundary of the divided area is superposed with the boundary of the boss;
in the second step, when the cutter descending groove is opened, the boundary of the cutter descending groove is superposed with the boundary of the boss;
in the third step, during the cycloid milling, the lower tool point of the tool is positioned in the lower tool groove, and the lower tool point of the tool is positioned in the middle of the lower tool groove;
in the fourth step, when the unprocessed region is processed, the lower tool point of the tool is located in the processed region in the third step, and the lower tool point of the tool is located in the middle of the boundary of the unprocessed region.
2. The cycloid milling roughing method for the engine case parts is characterized in that the width of the lower cutter groove is not less than 2-3 times of the diameter of the cutter.
3. The cycloid milling roughing method for the engine case parts is characterized in that during the cycloid milling machining, the cutting speed of a cycloid mill is 100-150 m/min, and the feeding speed is 600-1000 mm/min.
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| CN201910551425.4A CN110293253B (en) | 2019-06-24 | 2019-06-24 | Cycloid milling rough machining method for engine case parts |
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| CN201910551425.4A CN110293253B (en) | 2019-06-24 | 2019-06-24 | Cycloid milling rough machining method for engine case parts |
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| CN110293253B true CN110293253B (en) | 2021-03-12 |
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| CN110716494B (en) * | 2019-11-13 | 2020-11-17 | 中国航发动力股份有限公司 | Tool parameter identification method and cycloid machining parameter optimization method based on tool parameters |
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| CN107688323B (en) * | 2012-06-01 | 2020-04-28 | 德普技术公司 | Method and device for milling a cavity region of a workpiece |
| CN103264183B (en) * | 2013-05-23 | 2016-06-01 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of complicated casing class part external form conical surface conformal milling method |
| CN104090528B (en) * | 2014-06-30 | 2017-02-15 | 华南理工大学 | Method suitable for cycloid high-speed milling machining path |
| CN107931678A (en) * | 2017-11-24 | 2018-04-20 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of half casing taper surface high speed milling method of high temperature alloy point |
| CN107717029A (en) * | 2017-11-24 | 2018-02-23 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of opposite opened casing high-efficiency milling processing technology |
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