阅读说明：本技术 一种重型燃气轮机静叶异型孔加工装置及其加工方法 (device and method for machining special-shaped hole of stationary blade of heavy gas turbine ) 是由 张爱民 郑珂 徐培江 *** 郭志强 李明飞 饶勇 于 2019-08-16 设计创作，主要内容包括：本发明涉及燃气轮机静叶加工技术领域,公开了一种重型燃气轮机静叶异型孔加工装置,包括成型电极和固定工装,固定工装包括基座和可导电的夹持杆,基座一侧设有固定座,夹持杆一端与固定座可拆卸地连接,其另一端与成型电极可拆卸地连接；同时公开了采用该重型燃气轮机静叶异型孔加工装置加工异型孔的加工方法。本发明的加工装置通过增设夹持杆,大大缩减了成型电极的长度尺寸,减少了成型电极的材料消耗,同时由于成型电极的长度尺寸减小,在实际加工时更加不易折断损坏,且更短的成型电极在更换时更加快捷方便,以此实现了提高成型电极的使用寿命、缩短加工时间、降低加工成本的目的。(The invention relates to the technical field of gas turbine stationary blade machining, and discloses a heavy-duty gas turbine stationary blade special-shaped hole machining device which comprises a forming electrode and a fixing tool, wherein the fixing tool comprises a base and a conductive clamping rod, a fixed seat is arranged on one side of the base, one end of the clamping rod is detachably connected with the fixed seat, and the other end of the clamping rod is detachably connected with the forming electrode; meanwhile, the processing method for processing the special-shaped hole by adopting the device for processing the special-shaped hole of the static blade of the heavy-duty gas turbine is disclosed. The processing device greatly reduces the length size of the formed electrode and the material consumption of the formed electrode by additionally arranging the clamping rod, and simultaneously, the formed electrode is not easy to break and damage in actual processing due to the reduction of the length size of the formed electrode, and the shorter formed electrode is quicker and more convenient to replace, thereby realizing the purposes of prolonging the service life of the formed electrode, shortening the processing time and reducing the processing cost.)

1. The utility model provides a quiet leaf abnormal shape hole processingequipment of heavy gas turbine, includes shaping electrode (1) and fixed frock, characterized by: fixed frock includes base (2) and electrically conductive supporting rod (3), base (2) one side is equipped with fixing base (4), supporting rod (3) one end with fixing base (4) detachably connects, its other end with shaping electrode (1) detachably connects.

2. The heavy duty gas turbine stationary blade profile hole machining apparatus as claimed in claim 1, wherein: the clamping rod fixing device is characterized in that a first fixing groove matched with the clamping rod (3) is formed in the fixing seat (4), a first threaded hole is formed in the side wall of the first fixing groove, and the clamping rod (3) is fixed in the first fixing groove through a first screw (5).

3. The heavy duty gas turbine stationary blade profile hole machining apparatus as claimed in claim 2, wherein: the clamping rod (3) and one end of the first fixing groove are matched with a limiting block (6), and the first screw (5) is abutted to the limiting block (6).

4. the heavy duty gas turbine stationary blade profile hole machining apparatus as claimed in claim 1, wherein: the end part of the clamping rod (3) is provided with a second fixing groove matched with the formed electrode (1), the side wall of the second fixing groove is provided with a second threaded hole, and the formed electrode (1) is fixed in the second fixing groove through a second screw (7).

5. the heavy duty gas turbine stationary blade profile hole machining apparatus as claimed in claim 4, wherein: the forming electrode (1) comprises a clamping section (101) and a working section (102), wherein the cross section of the clamping section (101) is polygonal and is matched with the second fixing groove.

6. The heavy duty gas turbine stationary blade profile hole machining apparatus as claimed in claim 1, wherein: one side, deviating from the fixed seat (4), of the base (2) is provided with a fixed part (8), and the base (2) is fixed on a processing machine tool through the fixed part (8).

7. the heavy duty gas turbine stationary blade profile hole machining apparatus as claimed in claim 1, wherein: the clamping rod (3) is made of red copper.

8. A method for processing a special-shaped hole of a static blade of a heavy-duty gas turbine, which adopts the special-shaped hole processing device of the static blade of the heavy-duty gas turbine as claimed in any one of claims 1 to 6, and is characterized in that: the method comprises the following steps:

S1, clamping a turbine stationary blade to be processed on a processing machine tool and aligning;

S2, assembling the base (2) on a processing machine tool, and assembling the clamping rod (3);

S3, selecting the forming electrode (1) with a proper size according to the size of the special-shaped hole to be machined, and assembling the forming electrode (1) on the clamping rod (3) to enable the forming electrode (1) to be aligned to a gas film hole of the stationary blade of the gas turbine;

S4, starting a processing machine tool, and processing the air film hole into a special-shaped hole by using the forming electrode (1);

S5, selecting the forming electrodes (1) with different sizes according to the special-shaped holes with different sizes, and repeating the steps S3 and S4 until all the special-shaped holes are machined.

9. the heavy duty gas turbine stationary blade special-shaped hole machining method as claimed in claim 8, wherein: the machine tool is an electric spark machine tool.

Technical Field

The invention relates to the technical field of gas turbine stator blade machining, in particular to a heavy-duty gas turbine stator blade special-shaped hole machining device and a special-shaped hole machining method thereof.

Background

The stator blade for the heavy-duty gas turbine is an important hot-end part of the heavy-duty gas turbine, the manufacturing core technology and the using method of the stator blade are always in an absolute technical blocking state abroad, and the stator blade has the characteristics of large size, small tolerance, complex structure (complex hollow), long service life, multi-fuel applicability and the like, the total service life is far longer than that of an aero-engine blade, and the high-temperature material of the stator blade of the gas turbine has excellent structure and performance stability, oxidation resistance and thermal corrosion resistance.

The existing heavy gas turbine stationary blade often processes the air film hole on the stationary blade when processing, and then processes the special-shaped hole on the basis of the air film hole, and the device that current processing special-shaped hole adopted often is the shaping electrode of very long length, assembles the shaping electrode directly on the machine tool and carries out the processing of special-shaped hole. However, due to the different sizes of the special-shaped holes on the same stationary blade, the special-shaped holes need to be changed continuously during machining, the forming electrode with too long length is not easy to change, and the forming electrode is easy to break and damage during machining, so that the material waste of the forming electrode is serious, and the machining cost is increased.

disclosure of Invention

The first purpose of the invention is to provide a device for machining the special-shaped hole of the static blade of the heavy-duty gas turbine, which reduces the material consumption of a formed electrode to the maximum extent by additionally arranging a clamping rod, realizes the rapid electrode replacement and greatly saves the machining time and the machining cost.

The second purpose of the invention is to provide a method for processing the special-shaped hole of the static blade of the heavy-duty gas turbine, which enables the processing process to be smoother and quicker by adopting a special processing device to process the special-shaped hole.

The embodiment of the invention is realized by the following steps:

The fixed tool comprises a base and a conductive clamping rod, a fixed seat is arranged on one side of the base, one end of the clamping rod is detachably connected with the fixed seat, and the other end of the clamping rod is detachably connected with the formed electrode.

furthermore, a first fixing groove matched with the clamping rod is formed in the fixing seat, a first threaded hole is formed in the side wall of the first fixing groove, and the clamping rod is fixed in the first fixing groove through a first screw.

furthermore, the clamping rod and the end matched with the first fixing groove are provided with a limiting block, and the first screw is abutted to the limiting block.

furthermore, a second fixing groove matched with the formed electrode is formed in the end portion of the clamping rod, a second threaded hole is formed in the side wall of the second fixing groove, and the formed electrode is fixed in the second fixing groove through a second screw.

Further, the molding electrode comprises a clamping section and a working section, wherein the cross section of the clamping section is polygonal and is matched with the second fixing groove.

Furthermore, one side, deviating from the fixed seat, of the base is provided with a fixed part, and the base is fixed on the processing machine tool through the fixed part.

Furthermore, the clamping rod is made of red copper.

Secondly, the invention provides a method for processing the special-shaped hole of the static blade of the heavy-duty gas turbine, which adopts the device for processing the special-shaped hole of the static blade of the heavy-duty gas turbine and comprises the following steps:

S1, clamping a turbine stationary blade to be processed on a processing machine tool and aligning;

S2, assembling the base on a processing machine tool, and assembling the clamping rods;

S3, selecting the forming electrode with a proper size according to the size of the special-shaped hole to be machined, and assembling the forming electrode on the clamping rod to enable the forming electrode to be aligned with an air film hole of the stationary blade of the gas turbine;

S4, starting a processing machine tool, and processing the air film hole into a special-shaped hole by using the forming electrode;

S5, selecting the forming electrodes with different sizes according to the special-shaped holes with different sizes, and repeating the steps S3 and S4 until all the special-shaped holes are machined.

Further, the machine tool is an electric discharge machine.

the invention has the beneficial effects that:

The invention greatly reduces the length size of the formed electrode and the material consumption of the formed electrode by adding the clamping rod, and simultaneously, the formed electrode is not easy to break and damage in actual processing because the length size of the formed electrode is reduced, and the shorter formed electrode is quicker and more convenient to replace, thereby realizing the purposes of prolonging the service life of the formed electrode, shortening the processing time and reducing the processing cost.

drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

fig. 1 is a schematic structural diagram of a processing apparatus provided in embodiment 1 of the present invention;

FIG. 2 is a partial schematic structural view of a clamping bar according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a forming motor provided in embodiment 1 of the present invention.

Icon: 1-forming electrode, 101-clamping section, 102-working section, 2-base, 3-clamping rod, 4-fixing seat, 5-first screw, 6-limiting block, 7-second screw and 8-fixing part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.