CN111872506A - Row electrode assembly for machining multi-connected guide vane air film hole and machining method thereof - Google Patents
Row electrode assembly for machining multi-connected guide vane air film hole and machining method thereof Download PDFInfo
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- CN111872506A CN111872506A CN202010759350.1A CN202010759350A CN111872506A CN 111872506 A CN111872506 A CN 111872506A CN 202010759350 A CN202010759350 A CN 202010759350A CN 111872506 A CN111872506 A CN 111872506A
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- 238000003754 machining Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000000712 assembly Effects 0.000 claims abstract description 21
- 238000000429 assembly Methods 0.000 claims abstract description 21
- 238000010892 electric spark Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 229910001080 W alloy Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 6
- 239000002826 coolant Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/14—Making holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
Abstract
The invention discloses a row electrode assembly for machining a multi-connected guide vane gas film hole, which comprises a plurality of tool electrodes and an electrode clamping workpiece, wherein one end of the electrode clamping workpiece is a clamping end and used for clamping the tool electrodes, the other end of the electrode clamping workpiece is a fixed end and used for being connected with a main shaft of an electric spark machining machine tool, and a bend is formed between the clamping end and the fixed end; the clamping end extends from the end part to one side or two sides of the end part, the extending part formed after the extending is vertical to the length direction of the clamping end, and the plurality of tool electrodes are arranged on the extending part of the clamping end at equal intervals along the length direction of the extending part. And a method for processing a multi-connected guide vane gas film hole by utilizing the row of electrode assemblies. According to the invention, the plurality of tool electrodes are arranged on the clamping end of the electrode clamping workpiece at intervals in a row shape, so that the plurality of tool electrodes can be folded to enter between the two guide vanes, the gas film hole machining at the interference position between the guide vanes is realized, and the machining efficiency is improved.
Description
Technical Field
The invention relates to the technical field of machining of turbine engine workpieces, in particular to a row electrode assembly for machining a multi-guide vane gas film hole and a machining method thereof.
Background
The high-pressure turbine guider is an important part of a gas turbine and an aeroengine, and generally comprises guide blades and two side guide vane edge plates, wherein the unique bent structure of the guide vane guider can change the gas flow direction and push the movable blades to rotate. The guide vane is in the surrounding of high-temperature gas flow during working, is one of the parts with the highest temperature in the engine, has high and uneven temperature and is easy to burn out, so a large number of gas film holes are usually formed in the guide vane to achieve the purpose of protecting the guide vane from being burnt out by the high-temperature gas. In order to reduce the leakage loss between the guide vane edge plates, the guide vane edge plates are usually configured by double guide vanes, triple guide vanes and multiple guide vanes, and even a whole casting guide is adopted to improve the efficiency of the turbine engine.
In the prior art, the air film hole machining of the guide blade is completed by an electric spark or electric pulse machining technology, but the number of the air film holes is large, the space angle in the guider is complex, and the air film holes can be machined one by one due to the lagging of the existing equipment, so that the overall machining efficiency is low; moreover, the interval between the guide blades of the guider more than double-connected and the interval between the guide vane edge plates are short, and when the gas film holes are formed in the guider, the guide vanes, the guide vane edge plates and the guide vanes and the guide vane edge plates can interfere with each other, so that the gas film holes between the two-connected blades cannot be machined.
Disclosure of Invention
In view of the above, it is necessary to provide a row electrode assembly for processing a multi-connected guide vane film hole and a method for processing a multi-connected guide vane film hole, in which electrodes are folded and brought between guide vanes and between guide vane edge plates to achieve processing of an interference film hole, and processing efficiency is improved.
A row of electrode assemblies for processing a multi-connected guide vane gas film hole comprises a plurality of tool electrodes and an electrode clamping workpiece, wherein one end of the electrode clamping workpiece is a clamping end and used for clamping the tool electrodes, the other end of the electrode clamping workpiece is a fixed end and used for being connected with a main shaft of an electric spark machining machine tool, and a bend is formed between the clamping end and the fixed end; the clamping end extends from the end part to one side or two sides of the end part, the extending part formed after the extending is vertical to the length direction of the clamping end, and the plurality of tool electrodes are arranged on the extending part at equal intervals along the length direction of the extending part.
In one embodiment, the angle between the central axes of the clamping end and the fixed end is 85-95 degrees after the clamping end and the fixed end are bent.
In one embodiment, a plurality of clamping grooves are arranged on the extension part at intervals along the length direction of the extension part, the intervals among the clamping grooves are equal, and one end of the tool electrode can be inserted into the clamping grooves to be clamped by the extension part.
In one embodiment, the extending portion is also perpendicular to the length direction of the fixing end, and the opening direction of the clamping groove formed on the extending portion is vertical downward.
In one embodiment, the tool electrode is a hollow electrode, a liquid flow channel is formed in the electrode clamping workpiece, one end of the liquid flow channel is connected with cooling liquid for cooling and washing scraps, and the other end of the liquid flow channel is communicated with the hollow part of the tool electrode.
In one embodiment, the tool electrode is made of a copper tungsten alloy.
A processing method of a multi-connected guide vane gas film hole is used for processing a row of electrode assemblies for processing the multi-connected guide vane gas film hole and comprises the following steps:
s1, determining the size of the workpiece clamped by the electrode according to the shape and size of the turbine guide, and determining the diameter size of the tool electrode according to the diameter size of a preset gas film hole;
s2, determining the shape and size of the clamping end according to the size of the turbine guide and the tool electrode, so that the tool electrode can enter the turbine guide after being clamped by the clamping end;
and S3, the turbine guider is arranged on a workbench of the electric spark machine tool, the main shaft is controlled to move the electrode to clamp the workpiece, and the clamping end and the tool electrode clamped by the clamping end extend into the turbine guider to process the air film hole.
In one embodiment, in step S3, a fixture is provided on a table of the edm machine for fixing the turbine guide; the turbine guider is arranged on the fixture, the fixture is controlled to rotate until guide blades of the turbine guider are vertically arranged, and the vector direction of the preprocessed air film hole is rotated to the vertical direction; x, Y and Z-axis three-way movement is carried out by controlling the main shaft, the tool electrode is extended into the turbine guider, and the air film hole machining is carried out on the guide vane in sequence.
In one embodiment, the extension is perpendicular to the vane edge plate of the turbine vane when the tool electrode is extended into the turbine vane after the control fixture is rotated to the vertical alignment of the guide vanes of the turbine vane.
In one embodiment, in step S3, after the film hole of the guide vane is processed, the control fixture is rotated until the guide vane edge plates of the turbine guide are vertically aligned, the control spindle is moved in three directions, the control tool electrode is extended into the turbine guide, and the film hole is processed on the guide vane edge plate located below.
Compared with the prior art, the invention arranges a plurality of tool electrodes on the clamping end of the electrode clamping workpiece in a row shape, and bends the clamping end and the fixed end, so that the tool electrodes can enter between the guide blades and between the guide vane edge plates to process multi-blade interference air film holes, thereby not only enabling the shape and the position of the air film holes to be standard and neat, but also improving the processing efficiency.
Compared with the prior art, the invention aims at the turbine guide devices with different shapes and sizes, the tool electrodes with corresponding shapes and sizes and the electrode clamping workpieces are made, so that the clamping ends and the tool electrodes are matched with the space in the turbine guide devices, the interference gas film holes between the guide blades and between the guide vane edge plates are machined, the shape and the position of the gas film holes are standard and regular, and the machining efficiency is improved.
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 of the embodiments can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an assembled row of electrode assemblies for machining a multi-gang guide vane air film hole according to an embodiment of the invention;
FIG. 2 is a schematic view of a machining state of a multi-connected guide vane for film hole machining by using the row of electrode assemblies according to an embodiment of the present invention;
FIG. 3 is a schematic view of a machining state of a guide vane edge plate for gas film hole machining by using the row of electrode assemblies according to an embodiment of the present invention;
FIG. 4 is a front perspective view of a row of electrode assemblies for multi-gang vane film hole machining provided by an embodiment of the invention;
FIG. 5 is a top perspective view of a row of electrode assemblies for multi-gang vane film hole machining provided by an embodiment of the invention;
FIG. 6 is a left perspective view of a row of electrode assemblies for multi-gang vane film hole machining according to an embodiment of the present invention;
FIG. 7 is a front perspective view of another row of electrode assemblies for multi-gang vane film hole machining according to an embodiment of the present invention.
Wherein: 1-tool electrode, 2-electrode holding workpiece, 21-holding end, 22-fixing end, 23-extending part, 231-holding groove, 232-threaded hole, 24-liquid flow channel, 25-bolt, 3-turbine guider, 31-guide blade, 311-air film hole, 32-guide vane edge plate, 4-main shaft, 5-workbench, 6-clamp, 100-electric spark machine tool, alpha-bending angle.
Detailed Description
In order to facilitate understanding of the present invention, a row electrode assembly for multi-gang vane film hole machining and a method for machining the same will be described more fully with reference to the accompanying drawings. The attached drawings show a preferred embodiment of a row of electrode assemblies for processing a multi-guide vane air film hole and a processing method thereof. However, the row of electrode assemblies for multi-gang vane film hole machining and the method of machining the same may be implemented in many different forms and are not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete disclosure of the row of electrode assemblies for multi-gang vane gas film hole machining and methods of machining the same.
In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the rows of electrode assemblies for multi-gang vane film hole machining and the methods of machining thereof is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 4-6, an embodiment of the present invention provides a row electrode assembly for machining a multi-gang guide vane gas film hole, including a plurality of tool electrodes 1 and an electrode clamping workpiece 2, where one end of the electrode clamping workpiece 2 is a clamping end 21 for clamping the tool electrode 1, and the other end is a fixed end 22 for connecting with a spindle 4 of an electric discharge machine 100, and a bend exists between the clamping end 21 and the fixed end 22; the clamping end 21 extends from the end part to one side or two sides of the end part, an extending part 23 formed after the extending is vertical to the length direction of the clamping end 21, and a plurality of tool electrodes 1 are arranged on the extending part 23 at equal intervals along the length direction of the extending part 23. The main shaft 4 is controlled to move the electrode to clamp the workpiece 2, so that a plurality of tool electrodes 1 arranged on the extension part 23 in a row can extend into the turbine guider 3 to process the air film hole, and the processing efficiency is improved.
Specifically, as shown in fig. 1 to 3, in general, the spindle 4 of the electric discharge machine 100 is disposed vertically downward, and the fixed end 22 is also in a vertical state after being fixedly connected to the spindle 4, so that the fixed end 22 and the clamping end 21 are bent, and the clamping end 21 has a movable space in the Z-axis direction by bending, so that the tool electrode 1 can be clamped by the clamping end 21 and brought into the turbine guide 3 for air film hole machining. The extension 23 may be formed integrally with the holder 21 as a part of the holder 21, or may be a member fixedly connected to an end of the holder 21. The extending part 23 extends towards one side or two sides of the end part of the clamping end 21, which means that the extending part is perpendicular to the length direction of the clamping end 21 and extends linearly towards any side or two opposite sides of the end part of the clamping end 21, and after the extending part 23 extends towards one side of the end part, the end part of the clamping end 21 is positioned at any end of the extending part 23; after the extending part 23 extends to two opposite sides of the end part, the end part of the clamping end 21 is positioned in the middle of the extending part 23; preferably, the end of the clamping end 21 is located at the middle of the extension 23 to facilitate positioning of the machining position. The plurality of tool electrodes 1 can be detachably connected with the extension part 23 through bolts, threaded connection or other various clamping modes, and only the tool electrodes 1 need to be replaced after the tool electrodes 1 are consumed and deformed; the tool electrode 1 and the electrode clamping workpiece 2 can be detached from the main shaft 4 for replacement.
Further, as shown in fig. 4, after the clamping end 21 and the fixed end 22 are bent, the angle between the central axes of the two, i.e. the bending angle α, is 85 to 95 degrees. The central axis of the clamping end 21 refers to a central axis of a section of the clamping end 21 connected to the bent portion after the clamping end 21 and the fixed end 22 are bent, and an angle between the central axis of the clamping end 21 and the central axis of the fixed end 22, that is, a bending angle α, may be 85 to 95 degrees, so that a moving space is reserved in the Z-axis direction of the clamping end 21 by bending, and the tool electrode 1 can enter the turbine guide 3 to perform gas film hole machining. Generally, a bend is formed between the holding end 21 and the fixed end 22, and the bend angle α is 85-95 degrees, so as to achieve the purpose of bending into the turbine guide 3.
Further, as shown in fig. 5 and 6, a plurality of clamping grooves 231 are formed in the extending portion 23 at intervals along the length direction of the extending portion 23, the intervals between the clamping grooves 231 are equal, one end of the tool electrode 1 can be inserted into the clamping groove 231 and clamped by the clamping end 21, and the clamping grooves 231 are formed at equal intervals, so that the tool electrode 1 can be conveniently installed, and clamping can be more stable. Specifically, as shown in fig. 4 and 5, in the present embodiment, the extension portion 23 is divided into a left portion and a right portion, a clamping groove 231 is formed between the left and right extension portions, a through hole is formed on the left extension portion above the clamping groove 231, a threaded hole 232 is correspondingly formed on the right extension portion, a bolt 25 is inserted through the through hole on the left extension portion and screwed into the threaded hole 232 on the right extension portion by using a bolt coupling manner, the distance between the left and right extension portions 23 is controlled by changing the screwing depth of the bolt 25, and the tool electrode 1 is clamped and fixed, and the clamping is stable; in another embodiment, as shown in fig. 7, a threaded hole may be directly opened on a side perpendicular to the clamping groove 231, and the tool electrode 1 may be pressed and held in the clamping groove 231 by screwing the bolt 25 into the threaded hole in a bolt fixing manner and abutting against the tool electrode 1.
Further, as shown in fig. 4-6, the extending portion 23 is also perpendicular to the length direction of the fixing end 22, and the opening direction of the holding groove 231 formed on the extending portion 23 is vertical downward. With tool electrode 1 vertical installation in extension 23 below for the direction of punching is vertical direction and punch from last to down on turbine guider 3, makes things convenient for the staff to observe in order to fix a position and alignment.
Further, as shown in fig. 4-6, the tool electrode 1 is a hollow electrode, a liquid flow channel 24 is formed in the electrode clamping workpiece, one end of the liquid flow channel 24 is connected with a cooling liquid, the other end of the liquid flow channel is communicated with the hollow part of the tool electrode 1, the tool electrode 1 and the turbine guider 3 are cooled by the cooling liquid, and the drilling position is flushed to remove the impurity chips. More specifically, as shown in fig. 4 and 5, in the present embodiment, after the extension portion 23 is divided into two portions, a gap exists between the two extension portions 23, the coolant can flow out from the gap to assist cooling, and the width of the gap is smaller than the inner diameter of the fluid channel 24 formed in the extension portion 23, so that the coolant can flow through the fluid channel 24, communicate with each tool electrode 1, and flow out from the hollow portion of the tool electrode 1 to flush the drill hole position, thereby removing the debris.
Furthermore, the tool electrode 1 and the electrode clamping workpiece 2 are both made of copper-tungsten alloy, have high temperature resistance, arc ablation resistance, high specific gravity, high electric conduction and heat conduction performance and are easy to machine.
As shown in fig. 1 to fig. 3, an embodiment of the present invention further provides a method for processing a multi-connected guide vane gas film hole, where the method for processing a row of electrode assemblies for processing a multi-connected guide vane gas film hole includes the following steps:
s1, determining the size of the workpiece clamped by the electrode according to the shape and the size of the turbine guide 3, and determining the diameter size of the tool electrode 1 according to the diameter size of the preset air film hole 311;
s2, determining the shape and the size of the clamping end 21 according to the size of the turbine guide 3 and the tool electrode 1, so that the tool electrode 1 can enter the turbine guide 3 after being clamped by the clamping end 21;
s3, the turbine guide 3 is set on the table 5 of the electric discharge machine 100, the spindle 4 is controlled to move the electrode to clamp the workpiece, and the tool electrode 1 clamped by the clamping end 21 and the clamping end 21 is inserted into the turbine guide 3 to perform the film hole machining.
Further, as shown in fig. 1 and 2, in step S3, a fixture 6 is provided on the table 5 of the edm machine 100 for fixing the turbine guide 3, so that the turbine guide 3 can be turned by the table 5 after the turbine guide 3 is mounted on the fixture 6, and the turbine guide 3 can rotate around the X axis, the Y axis, and the Z axis; controlling the fixture 6 to rotate until the guide vanes 31 of the turbine guide 3 are vertically arranged, and rotating the vector direction of the preprocessed air film hole 311 to the vertical direction; the main shaft 4 is controlled to move X, Y and Z-axis three-way, the tool electrode 1 is inserted into the turbine guide 3, and the guide vane 31 is sequentially processed by the film hole processing. Specifically, the step of sequentially performing the air film hole machining on the guide vane 31 means that after one row of the air film holes 311 is machined, the fixture 6 is controlled to rotate, so that the vector direction of the next row of the preprocessed air film holes rotates to the vertical direction, and then the tool electrode 1 is controlled to move, so that the next row of the preprocessed air film holes is machined until all the air film holes on the guide vane 31 are machined.
Further, as shown in fig. 1 and 2, after the control fixture 6 is rotated to the vertical arrangement of the guide blades 31 of the turbine guide 3, the angle of the turbine guide 3 is adjusted by rotating around the X-axis direction, so that when the tool electrode 1 extends into the turbine guide 3, the extension portion 23 is perpendicular to the guide vane edge plate 32 of the turbine guide 3, and the machined gas film holes 311 are ensured to be regular in position, which conforms to the machining concept.
Further, as shown in fig. 1 and 3, in step S3, after the film hole of the guide vane 31 is processed, the control jig 6 vertically rotates the turbine guide 3 to vertically arrange the guide vane edge plates 32 of the turbine guide 3, and the control main shaft 4 is moved in three directions to control the tool electrode 1 to extend into the turbine guide 3, thereby processing the film hole of the guide vane edge plate 32 located below. Specifically, after the gas film hole of the guide blade 31 is processed, the control fixture 6 vertically rotates the turbine guide 3 by 90 degrees, that is, rotates by 90 degrees around the X axis as shown in fig. 1, so that the guide vane edge plates 32 of the turbine guide 3 are vertically arranged, at this time, the control tool electrode 1 extends into the turbine guide 3, and the gas film hole processing is performed on the guide vane edge plate 32 located below, and the angle of the turbine guide 3 can be adjusted by rotating around the Z axis direction in the processing process, so that a suitable gas film hole is processed on the guide vane edge plate 32 located below. After finishing processing the gas film hole on one guide vane edge plate 32, control anchor clamps 6 vertically rotate 180 degrees with turbine guider 3, namely rotate 180 degrees around the X axle as shown in figure 1 for the guide vane edge plate of normal position in the top rotates the below, and control tool electrode 1 stretches into turbine guider 3, carries out gas film hole processing to the second guide vane edge plate that is located the below, makes the gas film hole on two upper and lower guide vane edge plates symmetrical and regular, accords with the processing theory.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A row of electrode assemblies for processing a multi-connected guide vane gas film hole is characterized by comprising a plurality of tool electrodes and an electrode clamping workpiece, wherein one end of the electrode clamping workpiece is a clamping end and used for clamping the tool electrodes, the other end of the electrode clamping workpiece is a fixed end and used for being connected with a main shaft of an electric spark machining machine tool, and a bend is formed between the clamping end and the fixed end; the holder extends to tip one side or both sides from its tip, and the extension perpendicular to holder's that forms after the extension length direction, a plurality of tool electrodes are followed the length direction of extension, the equidistance interval sets up on the extension.
2. The row of electrode assemblies for machining a multi-gang guide vane gas film hole as defined in claim 1, wherein the angle between the central axes of the clamping end and the fixed end is 85-95 degrees after the clamping end and the fixed end are bent.
3. The row electrode assembly for multi-gang guide vane gas film hole machining as claimed in claim 1, wherein a plurality of clamping grooves are formed in the extension portion at intervals along the length direction of the extension portion, the clamping grooves are equally spaced, and one end of the tool electrode can be inserted into the clamping groove and clamped by the extension portion.
4. The row of electrode assemblies for processing a multi-gang guide vane gas film hole as defined in claim 3, wherein the extension portions are further perpendicular to the length direction of the fixed end, and the opening direction of the clamping grooves formed on the extension portions is vertically downward.
5. The row of electrode assemblies for machining the multi-connected guide vane air film hole as claimed in any one of claims 1 to 4, wherein the tool electrode is a hollow electrode, a liquid flow channel is formed in the electrode clamping workpiece, one end of the liquid flow channel is connected with cooling liquid for cooling and washing chips, and the other end of the liquid flow channel is communicated with the hollow part of the tool electrode.
6. The row of electrode assemblies for machining a multi-gang guide vane gas film hole as defined in claim 1, wherein the tool electrodes are made of copper-tungsten alloy.
7. A method for machining a multi-connected guide vane gas film hole, which is used for machining a row of electrode assemblies for the multi-connected guide vane gas film hole as claimed in any one of claims 1 to 6, and is characterized by comprising the following steps of:
s1, determining the size of the workpiece clamped by the electrode according to the shape and size of the turbine guide, and determining the diameter size of the tool electrode according to the diameter size of a preset gas film hole;
s2, determining the shape and size of the clamping end according to the size of the turbine guide and the tool electrode, so that the tool electrode can enter the turbine guide after being clamped by the clamping end;
and S3, the turbine guider is arranged on a workbench of the electric spark machine tool, the main shaft is controlled to move the electrode to clamp the workpiece, and the clamping end and the tool electrode clamped by the clamping end extend into the turbine guider to process the air film hole.
8. The method for machining a multi-split guide vane air film hole as claimed in claim 7, wherein in step S3, a fixture is provided on a table of an electric discharge machine for fixing a turbine guide vane; the turbine guider is arranged on the fixture, the fixture is controlled to rotate until guide blades of the turbine guider are vertically arranged, and the vector direction of the preprocessed air film hole is rotated to the vertical direction; x, Y and Z-axis three-way movement is carried out by controlling the main shaft, the tool electrode is extended into the turbine guider, and the air film hole machining is carried out on the guide vane in sequence.
9. The method for machining a multi-split guide vane air film hole as claimed in claim 8, wherein the extension part is perpendicular to a guide vane edge plate of the turbine guide vane when the tool electrode is inserted into the turbine guide vane after the control fixture is rotated until the guide vanes of the turbine guide vane are vertically arranged.
10. The method as claimed in claim 8 or 9, wherein in step S3, after the film holes of the guide vanes are processed, the control fixture is rotated until the guide vane edge plates of the turbine guide are vertically arranged, the main shaft is controlled to move in three directions, the tool electrode is controlled to extend into the turbine guide, and the film holes of the guide vane edge plates located below are processed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102848A (en) * | 2021-04-13 | 2021-07-13 | 贵州安吉华元科技发展有限公司 | Method for processing air film hole by using electrode special for integral row |
| CN113634830A (en) * | 2021-08-17 | 2021-11-12 | 中国航空制造技术研究院 | Electric spark machining tool and method for interference hole |
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| CN113102848A (en) * | 2021-04-13 | 2021-07-13 | 贵州安吉华元科技发展有限公司 | Method for processing air film hole by using electrode special for integral row |
| CN113634830A (en) * | 2021-08-17 | 2021-11-12 | 中国航空制造技术研究院 | Electric spark machining tool and method for interference hole |
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Application publication date: 20201103 |