Electrolysis milling-grinding efficient rough and fine machining integrated machining method

Abstract

The invention relates to an electrolysis milling-grinding efficient rough and fine machining integrated technology and a tool cathode, and belongs to the field of electrolysis milling-grinding composite machining. According to the provided technology, when the tool cathode with diamond abrasive particles is used for rough machining, the machining voltage of 20 V or above is adopted, and materialsare efficiently removed in a large-allowance manner under leading of the electrolysis action; during fine machining, the machining voltage of 5V or below is adopted firstly, the electrolysis action isonly used for generating a passivating film on the surface of a workpiece, the material surface is softened, then, the material is removed under the grinding action of the diamond abrasive particles,and the uneven machined surface during rough machining is preliminarily flattened; and then, the machining voltage is adjusted to be zero, electrolysis action marks left on the workpiece surface areremoved only through the grinding action of the diamond abrasive particles, the machining precision is further improved, and the surface quality is improved. According to the provided method, tool replacement is not needed, the same tool can be adopted for achieving efficient rough and fine machining of materials hard to machine, the positioning error caused by technology replacement do not exist,the workpiece machining efficiency and precision can be effectively improved, and the service life of a cutter is prolonged.

Description

technical field

[0001] The invention relates to an electrolytic milling and grinding high-efficiency roughing and finishing integrated processing method, which belongs to the field of electrolytic milling and grinding combined processing. Background technique

[0002] With the development of the aerospace industry, more and more aerospace parts are made of difficult-to-machine materials such as high-temperature alloys and titanium alloys. For example, in order to make the thrust-to-weight ratio of aero-engines reach more than 8, it is necessary to use titanium alloys to make compressor disks and blades; the mass fractions of GH4169 in CF6 engine, CY2000 engine and PW4000 engine reached 34%, 56% and 57%, respectively. However, for some parts with complex processing features and thin structure, such as the thin-walled casing of the combustion chamber of an aero-engine, not only the material removal ratio from the blank to the part can be as high as 60%~80%, but also has a high...

Examples

Embodiment

[0030] The tool cathode outer wall diameter that this embodiment is used is 10mm, and total length is 60mm, and its sidewall and bottom surface thickness are 1mm, and the bottom surface and the sidewall area within the scope of 15mm above are all electroplated with 180# diamond abrasive grains, and sidewall has 5 A total of 30 direct 1mm spray holes are arranged in 6 rows. During the test, the workpiece material is GH4169, which is difficult to process. The electrolyte is a sodium nitrate solution with a mass fraction of 10%. The temperature is 30°C and the pressure is 0.6MPa. During rough machining, the machining voltage is 30V, the cutting depth of the tool cathode is 10mm, and the feed speed is 2.2mm / min. The surface and cross section of the machined groove are as follows: Figure 4 , 5 shown, from Figure 4 It can be seen that there are almost no wear marks on the machined surface, indicating that the material is mainly removed efficiently by electrolysis, and the materia...

technical field

[0001] The invention relates to an electrolytic milling and grinding high-efficiency roughing and finishing integrated processing method, which belongs to the field of electrolytic milling and grinding combined processing. Background technique

[0002] With the development of the aerospace industry, more and more aerospace parts are made of difficult-to-machine materials such as high-temperature alloys and titanium alloys. For example, in order to make the thrust-to-weight ratio of aero-engines reach more than 8, it is necessary to use titanium alloys to make compressor disks and blades; the mass fractions of GH4169 in CF6 engine, CY2000 engine and PW4000 engine reached 34%, 56% and 57%, respectively. However, for some parts with complex processing features and thin structure, such as the thin-walled casing of the combustion chamber of an aero-engine, not only the material removal ratio from the blank to the part can be as high as 60%~80%, but also has a high...

Examples

Embodiment

[0030] The tool cathode outer wall diameter that this embodiment is used is 10mm, and total length is 60mm, and its sidewall and bottom surface thickness are 1mm, and the bottom surface and the sidewall area within the scope of 15mm above are all electroplated with 180# diamond abrasive grains, and sidewall has 5 A total of 30 direct 1mm spray holes are arranged in 6 rows. During the test, the workpiece material is GH4169, which is difficult to process. The electrolyte is a sodium nitrate solution with a mass fraction of 10%. The temperature is 30°C and the pressure is 0.6MPa. During rough machining, the machining voltage is 30V, the cutting depth of the tool cathode is 10mm, and the feed speed is 2.2mm / min. The surface and cross section of the machined groove are as follows: Figure 4 , 5 shown, from Figure 4 It can be seen that there are almost no wear marks on the machined surface, indicating that the material is mainly removed efficiently by electrolysis, and the materia...

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