CN-121972745-A - Air film hole forming electrode structure

Abstract

The invention relates to the technical field of electrode structures, and provides a gas film hole forming electrode structure, which comprises an electrode main body, wherein the electrode main body is provided with a main body part and a plurality of forming parts which are matched with the shape of a special-shaped hole, the forming parts are arranged on the bottom surface of the main body part at intervals and can be in one-to-one correspondence with a gas film hole on a blade, and the end parts of the forming parts at two ends are provided with cylindrical parts which can be matched with the gas film hole. The invention can process a row of special-shaped holes at one time, can improve the processing efficiency of the special-shaped holes, and the cylindrical part arranged at the end part of the forming part can be matched with the air film holes, thereby realizing quick positioning and guiding, and being convenient for improving the punching position precision.

Inventors

• WU HONG
• XU PEIJIANG
• LI MINGFEI
• CHAI LEI
• ZHAO DANDAN
• LIU WEI
• LI CHAOYANG
• ZHOU QUANKAI
• DENG BO
• QIN HUAHUN
• LEI YUEHUA

Assignees

• 中国联合重型燃气轮机技术有限公司

Dates

Publication Date

20260505

Application Date

20260211

Claims (8)

1. 1. The utility model provides a gas film hole shaping electrode structure, its characterized in that includes the electrode main part, and it has body portion and a plurality of shaping portion that coincide with dysmorphism hole shape, and a plurality of shaping portion intervals set up in the bottom surface of body portion and can with a row of gas film hole one-to-one on the blade, the tip of shaping portion at both ends is equipped with can with gas film hole complex cylinder portion.
2. 2. The gas film hole forming electrode structure according to claim 1, wherein the length of the cylindrical portion is 4-6mm.
3. 3. The gas film hole forming electrode structure according to claim 1, wherein edges on two sides of the bottom surface of the body portion are provided with inclined avoiding surfaces.
4. 4. The gas film hole forming electrode structure according to claim 1, wherein the electrode body is made of copper-tungsten alloy or silver-tungsten alloy.
5. 5. The gas film hole forming electrode structure according to any one of claims 1 to 4, wherein the forming electrode structure further comprises a quick-change plate and a quick-change connector, a connecting rod is arranged at the top of the quick-change connector, the quick-change plate is connected with the quick-change connector through screws, a plurality of connecting threaded holes are arranged in parallel on the top surface of the body, and the quick-change plate is provided with connecting through holes in one-to-one correspondence with the connecting threaded holes, and the connecting through holes are connected with the connecting threaded holes through screws.
6. 6. The gas film hole forming electrode structure according to claim 5, wherein the top surface of the quick-change plate is provided with a positioning hole matched with the quick-change connector.
7. 7. The gas film hole forming electrode structure according to claim 5, wherein the connecting through holes are provided with a plurality of rows on both sides of the quick-change connector.
8. 8. The gas film hole forming electrode structure according to claim 5, wherein the connection through hole is a countersunk hole.

Description

Air film hole forming electrode structure Technical Field The invention relates to the technical field of electrode structures, in particular to a gas film hole forming electrode structure. Background In aeroengines and gas turbines, turbine blades and guide blades, the blades are often designed with a large number of air film holes to meet the cooling requirement, and the end parts of some air film holes are provided with holes which are irregularly shaped circular arc diffusion (or pyramid diffusion) towards the periphery, and are commonly called as special-shaped holes (also called as forming holes and dustpan holes). At present, electrode machining (also called electric spark machining and electric spark forming) is generally adopted for machining the gas film hole, and a great amount of heat is released by spark discharge generated between an electrode and a workpiece to be machined, so that local metal of the workpiece to be machined is corroded, and the workpiece is separated from a blank body, thereby achieving the purpose of machining requirements. The special-shaped holes at the end parts of the air film holes are machined on a forming machine tool in a traditional mode, the forming electrodes are adopted for machining at present, and the air film holes and the special-shaped holes are machined by being clamped on a common electric spark machining machine tool in a one-time mode in combination with a common punching electrode, so that the purpose of improving machining efficiency is achieved. For example, the prior art with publication numbers of CN117840528A and CN114985852 is used for processing the special-shaped holes through the forming electrode which is matched with the special-shaped holes in shape, however, the prior forming electrode can only process one special-shaped hole at a time, and the efficiency is still low. Disclosure of Invention The invention aims to provide a gas film hole forming electrode structure so as to solve the defects in the prior art. The invention is realized by the following technical scheme: The utility model provides a gas film hole shaping electrode structure, includes the electrode main part, and it has body portion and a plurality of shaping portion that coincide with dysmorphism hole shape, and a plurality of shaping portion intervals set up in the bottom surface of body portion and can with a row of gas film hole one-to-one on the blade, the tip of shaping portion at both ends is equipped with can with gas film hole complex cylinder portion. Optionally, the length of the cylindrical portion is 4-6mm. Optionally, edges on two sides of the bottom surface of the body part are provided with inclined avoidance surfaces. Optionally, the electrode body is made of copper tungsten alloy or silver tungsten alloy. Optionally, the formed electrode structure further comprises a quick-change plate and a quick-change connector, wherein the top of the quick-change connector is provided with a connecting rod, the quick-change plate is connected with the quick-change connector through screws, the top surface of the body part is provided with a plurality of parallel connection threaded holes, the quick-change plate is provided with connection through holes corresponding to the connection threaded holes one by one, and the connection through holes are connected with the connection threaded holes through screws. Optionally, a positioning hole matched with the quick-change connector is formed in the top surface of the quick-change plate. Optionally, the two sides of the quick-change connector are provided with a plurality of rows of connecting through holes. Optionally, the connecting through hole is a countersunk hole. The technical scheme of the invention has at least the advantages and beneficial effects that the shape of the plurality of forming parts on the electrode main body is matched with the shape of the air film hole, the forming parts can be in one-to-one correspondence with the air film hole, a row of special-shaped holes can be processed at one time, the processing efficiency of the special-shaped holes can be improved, and the cylindrical parts arranged at the end parts of the forming parts can be matched with the air film hole, so that quick positioning and guiding are realized, and the punching position precision is convenient to improve. Drawings FIG. 1 is a schematic view of an electrode body; Fig. 2 is an enlarged view at a in fig. 1; FIG. 3 is a schematic structural view of a gas film hole forming electrode structure provided by the invention; The electrode comprises a 1-electrode main body, a 101-body part, 1011-inclined avoidance surfaces, 1012-connecting threaded holes, 102-forming parts, 103-cylindrical parts, 2-quick-change plates, 201-connecting through holes, 3-quick-change connectors and 4-connecting rods. Detailed Description Referring to fig. 1 and 2, a gas film hole forming electrode structure, including an electrode main body 1, it has a body po