阅读说明：本技术 一种叶片定位键端面加工装夹装置及方法 (Blade positioning key end face machining clamping device and method ) 是由 张军全 温学兵 王冬 杨壮 延梦莹 刘王俊 党玉芳 王昭 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种叶片定位键端面加工装夹装置及方法,装夹装置,包括底板,底板上设置有能够对叶片内缘板进气侧端面以及外缘板进气侧端面进行支撑和定位的支撑块、能够对叶片内缘板叶盆侧楔面以及叶片外缘板叶盆侧楔面进行定位的定位块、能够对叶片流道表面进行定位的定位销、能够压住叶片内缘板支板以及外缘板支板的压板。本发明叶片定位键端面加工装夹装置结合叶片的结构特点进行设计,其装置结构简单,定位设置合理,加工时方便装夹,可优化叶片加工过程操作。(The invention discloses a clamping device and a method for processing the end face of a blade positioning key, wherein the clamping device comprises a bottom plate, the bottom plate is provided with a supporting block capable of supporting and positioning the air inlet side end face of an inner edge plate and the air inlet side end face of an outer edge plate of a blade, a positioning block capable of positioning the wedge face of a blade basin side of the inner edge plate and the wedge face of a blade basin side of an outer edge plate of the blade, a positioning pin capable of positioning the surface of a blade runner, and a pressing plate capable of pressing a supporting plate of the inner edge plate of the blade and a supporting plate of the outer edge plate of the blade. The clamping device for processing the end face of the blade positioning key is designed by combining the structural characteristics of the blade, has a simple structure and reasonable positioning arrangement, is convenient to clamp during processing, and can optimize the operation of the blade processing process.)

1. The clamping device for processing the end face of the blade positioning key is characterized by comprising a base plate (1), wherein a supporting block capable of supporting and positioning the air inlet side end face of an inner edge plate and the air inlet side end face of an outer edge plate, a positioning block (2) capable of positioning the wedge face of the inner edge plate blade basin and the wedge face of the outer edge plate blade basin of the blade, a positioning pin (5) capable of positioning the surface of a blade runner and a pressing plate (4) capable of pressing a supporting plate of the inner edge plate of the blade and a supporting plate of the outer edge plate are arranged on the base plate (1).

2. The clamping device for machining the end face of the blade positioning key according to claim 1, wherein the supporting block is a hard alloy block (6).

3. The blade positioning key end face machining clamping device is characterized in that a first positioning pin (12) and a connecting bolt are arranged on the positioning block (2) and the base plate (1), and the positioning block (2) and the base plate (1) are positioned through the first positioning pin (12) and fixedly connected through the connecting bolt.

4. The end face machining and clamping device for the blade positioning key according to claim 1, wherein the positioning block (2) comprises a first positioning block and a second positioning block, and the first positioning block and the second positioning block are used for positioning a blade inner edge plate blade basin side wedge face and a blade outer edge plate blade basin side wedge face respectively.

5. The clamping device for machining the end face of the blade positioning key according to claim 1 or 4, wherein the positioning block (2) is provided with an inclined positioning surface (2-1), and the positioning block (2) is in contact positioning with a blade inner edge plate blade basin side wedge surface or a blade outer edge plate blade basin side wedge surface through the inclined positioning surface (2-1).

6. The blade positioning key end face machining clamping device is characterized in that a support (3) is installed on a bottom plate (1), a positioning pin (5) is installed on the support (3), and the part, in contact with the surface of a blade flow channel, of the positioning pin (5) is set to be a smooth arc face (5-1).

7. The blade positioning key end face machining clamping device is characterized in that a pressure plate (4) is installed on a bottom plate (1) through an adjusting support (10) and a double-end stud (11), one end of the adjusting support (10) is in threaded connection with the bottom plate (1), the other end of the adjusting support (10) abuts against the lower surface of one end of the pressure plate (4), one end of the double-end stud (11) is in threaded connection with the bottom plate (1), the other end of the double-end stud (11) penetrates through the other end of the pressure plate (4), and a nut is connected to the double-end stud (11) above the pressure plate (4).

8. The blade positioning key end face machining and clamping device as claimed in claim 7, wherein a sliding groove (4-1) for embedding the upper end of the adjusting support (10) is formed in the lower surface of the pressing plate (4), the upper end of the adjusting support (10) abuts against the bottom surface of the sliding groove (4-1), a through hole for the stud bolt (11) to pass through is formed in the pressing plate (4), the through hole is formed into a long hole, and the length direction of the long hole is the same as the direction of the sliding groove (4-1).

9. The blade positioning key end face machining clamping device as claimed in claim 7 or 8, wherein the upper end face of the adjusting support (10) is provided with a convex smooth curved surface (10-1), and the upper end of the adjusting support (10) is provided with a plane (10-1) for screwing a wrench and an adjusting hole (10-3) for inserting a rod piece.

10. A method for processing an end face of a blade positioning key, which is characterized in that the method adopts the blade positioning key end face processing and clamping device of any one of claims 1 to 9 to position and clamp a blade, and comprises the following steps:

the end surface of the air inlet side of the inner edge plate of the blade and the end surface of the air inlet side of the outer edge plate of the blade are abutted against the corresponding surfaces of the supporting blocks, so that the blade is stably installed in the axial direction;

attaching the inner edge plate blade basin side wedge surface and the outer edge plate blade basin side wedge surface of the blade to corresponding positioning surfaces on the positioning block for positioning;

contacting the surface of the flow channel of the blade with a positioning pin, and positioning through the positioning pin;

the supporting plate of the inner edge plate and the supporting plate of the outer edge plate of the blade are stably pressed by the pressing plate;

and after the blade is stably clamped, processing the end face of the blade positioning key.

Technical Field

The invention relates to the technical field of milling and clamping end faces of positioning keys in grooves of outer edge plates of guide vanes of a certain type of gas turbine, in particular to a device and a method for clamping end faces of positioning keys of vanes.

Background

The turbine guide vane is one of core components of devices such as a gas turbine, an aircraft engine and the like, and occupies a very important position in assembly parts such as the gas turbine, the aircraft engine and the like; the assembly link of the blades of the gas turbine and the aero-engine is the final link of the whole manufacturing process of the turbine parts and is one of the most important links, the assembly quality of the turbine parts is determined by the assembly precision of the turbine parts, the performance, the production efficiency and the like of the turbine parts are greatly influenced, and the processing quality and precision of the blades play an important role in final assembly. The positioning key of the guide vane of the turbine of a gas turbine of a certain model has higher processing difficulty on the end surface of the positioning key due to the structural design of parts, an operator uses tools such as a polishing knife and the like to process the end surface of the positioning key, the size of the positioning key is not easy to guarantee, and the problem that the processing of the end surface of the positioning key is urgent is solved. In order to improve the end face machining quality of the blade positioning key and combine the structural characteristics of the blade, the blade machining process needs to be improved, and the positioning key end face machining clamping device needs to be designed and manufactured, so that the blade positioning key machining qualification rate is improved, the assembly quality problem existing in the engine assembly process is solved, and the assembly quality of the turbofan engine is ensured.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a blade positioning key end face machining clamping device and a blade positioning key end face machining clamping method, so that the problem of clamping and positioning in the blade machining process is solved, and the blade machining quality is improved.

The technical scheme adopted by the invention is as follows:

the utility model provides a blade positioning key terminal surface processing clamping device, includes the bottom plate, is provided with the supporting shoe that can support and fix a position blade inner flange board side end face and outer fringe board side end face that admits air on the bottom plate, can fix a position the locating piece that can carry out location to blade inner edge board blade basin side wedge face and blade outer fringe board blade basin side wedge face, can fix a position the locating pin that can go on the blade runner surface, can push down the clamp plate of blade inner edge board extension board and outer fringe board extension board.

Preferably, the supporting block is made of hard alloy blocks.

Preferably, the positioning block and the bottom plate are provided with a first positioning pin and a connecting bolt, and the positioning block and the bottom plate are positioned through the first positioning pin and fixedly connected through the connecting bolt.

Preferably, the positioning block comprises a first positioning block and a second positioning block, and the first positioning block and the second positioning block are used for respectively positioning the wedge surface of the blade inner edge plate and the wedge surface of the blade outer edge plate.

Preferably, the positioning block is provided with an inclined positioning surface, and the positioning block is in contact positioning with the blade inner edge plate blade basin side wedge surface or the blade outer edge plate blade basin side wedge surface through the inclined positioning surface.

Preferably, a support is installed on the bottom plate, the positioning pin is installed on the support, and the part of the positioning pin, which is in contact with the surface of the blade flow channel, is a smooth cambered surface.

Preferably, the pressing plate is installed on the bottom plate through the adjusting support and the stud, one end of the adjusting support is in threaded connection with the bottom plate, the other end of the adjusting support abuts against the lower surface of one end of the pressing plate, one end of the stud is in threaded connection with the bottom plate, the other end of the stud penetrates through the other end of the pressing plate, and a nut is connected to the stud above the pressing plate.

Preferably, the lower surface of the pressing plate is provided with a sliding groove for embedding the upper end of the adjusting support, the upper end of the adjusting support abuts against the bottom surface of the sliding groove, the pressing plate is provided with a through hole for the stud to pass through, the through hole is a long hole, and the length direction of the long hole is the same as the direction of the sliding groove.

Preferably, the upper end face of the adjusting support is a convex smooth curved surface, and the upper end of the adjusting support is provided with a plane for screwing a wrench and an adjusting hole for extending a rod piece into.

The invention also provides a blade positioning key end face machining method, which adopts the blade positioning key end face machining and clamping device to position and clamp the blade, and comprises the following processes:

the end surface of the air inlet side of the inner edge plate of the blade and the end surface of the air inlet side of the outer edge plate of the blade are abutted against the corresponding surfaces of the supporting blocks, so that the blade is stably installed in the axial direction;

attaching the inner edge plate blade basin side wedge surface and the outer edge plate blade basin side wedge surface of the blade to corresponding positioning surfaces on the positioning block for positioning;

contacting the surface of the flow channel of the blade with a positioning pin, and positioning through the positioning pin;

the supporting plate of the inner edge plate and the supporting plate of the outer edge plate of the blade are stably pressed by the pressing plate;

and after the blade is stably clamped, processing the end face of the blade positioning key.

The invention has the following beneficial effects:

according to the blade positioning key end face machining and clamping device, the supporting blocks can be used for supporting and positioning the end face of the air inlet side of the blade inner edge plate and the end face of the air inlet side of the outer edge plate, so that the axial installation stability of the blade can be ensured; the positioning block and the positioning pin can ensure the installation position of the blade, the pressing plate can press the blade downwards and clamp the whole blade together with the supporting block, and the position stability of the end face of the blade positioning key in the machining process is ensured. The clamping device for processing the end face of the blade positioning key is designed by combining the structural characteristics of the blade, has a simple structure and reasonable positioning arrangement, is convenient to clamp during processing, and can optimize the operation of the blade processing process.

Drawings

FIG. 1 is a front view of the structure of the apparatus of the present invention;

FIG. 2 is a left side view of the device configuration of the present invention;

FIG. 3 is a front view of the base plate of the apparatus of the present invention;

FIG. 4 is a left side view of the base plate of the apparatus of the present invention;

FIG. 5 is a front view of the positioning block of the apparatus of the present invention;

FIG. 6 is a left side view of the positioning block of the apparatus of the present invention;

FIG. 7 is a front view of the platen of the apparatus of the present invention;

FIG. 8 is a top plan view of the platen of the apparatus of the present invention;

FIG. 9 is a front view of the locating pin of the apparatus of the present invention;

FIG. 10 is a front elevational view of a spherical shoulder nut of the apparatus of the present invention;

FIG. 11 is a left side view of a spherical shoulder nut of the apparatus of the present invention;

FIG. 12 is a front elevational view of the adjustment support of the apparatus of the present invention;

FIG. 13 is a top plan view of the device adjustment support of the present invention;

wherein, 1-bottom plate, 1-1-adjusting support mounting hole, 1-2-stud mounting hole, 1-3-first positioning pin hole, 1-4-first threaded hole, 2-positioning block, 2-1-inclined positioning surface, 3-support, 3-1-second positioning pin hole, 3-2-through hole, 4-pressing plate, 4-1-sliding groove, 4-2-long hole, 5-positioning pin, 5-1-smooth cambered surface, 6-hard alloy block, 7-inner hexagonal cylinder head screw, 8-spherical surface with shoulder nut, 9-hexagonal thin nut, 10-adjusting support, 10-1-plane, 10-2-smooth curved surface, 10-3-adjusting hole, 10-4-thread section, 11-double-end stud, 12-first locating pin and 13-conical washer.

Detailed Description

The invention is further described below with reference to the figures and examples.

Referring to fig. 1 and 2, the blade positioning key end face machining and clamping device is mainly used for positioning and clamping during milling of the positioning key end face in the groove of the outer edge plate of the turbine guide blade of a gas turbine, and comprises a bottom plate 1, wherein the bottom plate 1 is provided with a supporting block capable of supporting and positioning the air inlet end face of an inner edge plate and the air inlet end face of an outer edge plate of the blade, a positioning block 2 capable of positioning the wedge face of a blade basin side of an inner edge plate of the blade and the wedge face of the blade basin side of an outer edge plate of the blade, a positioning pin 5 capable of positioning the surface of a blade runner, and a pressing plate 4 capable of pressing a supporting plate of the inner edge plate of the blade and the supporting plate of the outer edge plate.

Referring to fig. 1-4, the supporting block is made of hard alloy blocks 6, and has the characteristics of wear resistance and small deformation, and can ensure the position accuracy of the blade in the axial installation process.

Referring to fig. 1 and 3, a first positioning pin 12 and a connecting bolt are arranged on a positioning block 2 and a bottom plate 1, the positioning block 2 and the bottom plate 1 are positioned by the first positioning pin 12 and fixedly connected by the connecting bolt, and a first positioning pin hole 1-3 for installing the first positioning pin 12 and a first threaded hole 1-4 for installing the connecting bolt are arranged on the bottom plate 1.

Referring to fig. 1 and 2, the positioning block 2 includes a first positioning block and a second positioning block, which respectively position the inner edge plate and the outer edge plate of the blade.

As a preferred embodiment of the invention, referring to FIGS. 1 and 2, the positioning block 2 is provided with a bevel positioning surface 2-1, and the positioning block 2 is positioned by contacting with the blade inner edge plate blade basin side wedge surface or the blade outer edge plate blade basin side wedge surface through the bevel positioning surface 2-1.

Referring to fig. 1, 2, 5 and 6, a base plate 1 is provided with a support 3, a positioning pin 5 is provided on the support 3, and a portion of the positioning pin 5 contacting the surface of the blade flow passage is a smooth arc surface 5-1. The support 3 is connected with the bottom plate 1 in a positioning mode through pins and in a fastening mode through bolts, and the bottom plate 1 is provided with corresponding positioning holes and threaded holes. Holes for the pins and the bolts to pass through on the support 3 are all unthreaded holes.

Referring to fig. 1, 2, 3, 7 and 8, a pressure plate 4 is mounted on a base plate 1 through an adjusting support 10 and a stud 11, one end of the adjusting support 10 is in threaded connection with the base plate 1, the other end of the adjusting support 10 is abutted against the lower surface of one end of the pressure plate 4, one end of the stud 11 is in threaded connection with the base plate 1, the other end of the stud 11 penetrates through the other end of the pressure plate 4, and a nut is connected to the stud 11 above the pressure plate 4. An adjusting support mounting hole 1-1 (threaded hole) in threaded connection with an adjusting support 10 and a stud mounting hole 1-2 (threaded hole) in threaded connection with a stud 11 are formed in the base plate 1.

Referring to fig. 7, as a preferred embodiment of the present invention, the lower surface of the pressing plate 4 is provided with a sliding groove 4-1 into which the upper end of the adjusting support 10 is inserted, the upper end of the adjusting support 10 abuts against the bottom surface of the sliding groove 4-1, the pressing plate 4 is provided with a through hole through which the stud 11 passes, the through hole is a long hole, and the length direction of the long hole is the same as the direction of the sliding groove 4-1 (both left and right directions, taking the orientation shown in fig. 2 as an example).

Referring to fig. 12 and 13, as a preferred embodiment of the present invention, the upper end surface of the adjusting support 10 is provided with a convex smooth curved surface 10-1, and the upper end of the adjusting support 10 is provided with a flat surface 10-1 for screwing a wrench and an adjusting hole 10-3 for inserting a rod.

The invention also provides a blade positioning key end face machining method, which adopts the blade positioning key end face machining and clamping device to position and clamp the blade, and comprises the following processes:

the end surface of the air inlet side of the inner edge plate of the blade and the end surface of the air inlet side of the outer edge plate of the blade are abutted against the corresponding surfaces of the supporting blocks, so that the blade is stably installed in the axial direction;

attaching the inner edge plate blade basin side wedge surface and the outer edge plate blade basin side wedge surface of the blade to corresponding positioning surfaces on the positioning block for positioning;

contacting the surface of the flow channel of the blade with a positioning pin, and positioning through the positioning pin;

the supporting plate of the inner edge plate and the supporting plate of the outer edge plate of the blade are stably pressed by the pressing plate;

and after the blade is stably clamped, processing the end face of the blade positioning key.

As can be seen from the above description,

examples

As shown in fig. 1 to 13, the blade positioning key end surface processing and clamping device of the embodiment includes a bottom plate 1, two positioning blocks 2, a support 3, a pressure plate 4, a positioning pin 5, and three hard alloy blocks 6, wherein the positioning blocks 2 and the bottom plate 1 are provided with a first positioning pin 12 and a connecting bolt, the positioning blocks 2 and the bottom plate 1 are positioned by the first positioning pin 12 and fixedly connected by the connecting bolt, and the bottom plate 1 is provided with a first positioning pin hole 1-3 for mounting the first positioning pin 12 and a first threaded hole 1-4 for mounting the connecting bolt. The two positioning blocks are respectively used for positioning the blade inner edge plate blade basin side wedge surface and the blade outer edge plate blade basin side wedge surface. The positioning block 2 is provided with an inclined positioning surface 2-1, and the positioning block 2 is in contact positioning with a blade inner edge plate blade basin side wedge surface or a blade outer edge plate blade basin side wedge surface through the inclined positioning surface 2-1. And a positioning pin 5 is arranged on the support 3, and the part of the positioning pin 5, which is in contact with the surface of the blade flow passage, is set to be a smooth cambered surface 5-1. The support 3 is connected with the bottom plate 1 in a positioning mode through pins and in a fastening mode through bolts, and the bottom plate 1 is provided with corresponding positioning holes and threaded holes. Holes for the pins and the bolts to pass through on the support 3 are all unthreaded holes. The pressing plate 4 is installed on the bottom plate 1 through the adjusting support 10 and the stud 11, one end of the adjusting support 10 is in threaded connection with the bottom plate 1, the other end of the adjusting support 10 abuts against the lower surface of one end of the pressing plate 4, one end of the stud 11 is in threaded connection with the bottom plate 1, the other end of the stud 11 penetrates through the other end of the pressing plate 4, and a nut is connected to the upper portion of the pressing plate 4 on the stud 11. The bottom plate 1 is provided with an adjusting support mounting hole 1-1 in threaded connection with an adjusting support 10 and a stud mounting hole 1-2 connected with a stud 11. The lower surface of the pressing plate 4 is provided with a sliding groove 4-1 for embedding the upper end of the adjusting support 10, the upper end of the adjusting support 10 is abutted against the bottom surface of the sliding groove 4-1, the pressing plate 4 is provided with a through hole for the stud 11 to pass through, the through hole is a long hole, and the length direction of the long hole is the same as the direction of the sliding groove 4-1. The upper end surface of the adjusting support 10 is provided with a convex smooth curved surface 10-1, and the upper end of the adjusting support 10 is provided with a plane 10-1 for screwing a wrench and an adjusting hole 10-3 for inserting a rod piece.

When the end face of the positioning key of the blade outer edge plate is machined by using the end face machining and clamping device for the positioning key of the blade positioning key of the embodiment, the end face of the air inlet side of the blade inner edge plate is arranged on the positioning face of the hard alloy positioning face at the position 1 on the bottom plate, and the end face of the air inlet side of the outer edge plate is arranged on the positioning face of the hard alloy positioning face at the position 2 on the bottom plate, so that the axial installation stability of the blade is ensured; attaching wedge surfaces on the sides of the blade basins of the inner and outer edge plates of the blade to positioning surfaces of the inclined surfaces of the positioning blocks, and contacting the surfaces of the flow channels with the positioning pins for positioning to ensure that all the positioning surfaces are not excessive with a 0.03mm clearance gauge; the pressing plate is used for pressing the supporting plate of the inner edge plate and the outer edge plate of the blade, and the spherical shoulder nut is screwed tightly, so that the end face machining and clamping of the positioning key can be realized.

Specifically, the method comprises the following steps: the positioning key end face of the outer edge plate of the high-pressure guide blade of a certain model gas turbine needs to be milled, the step difference between the positioning key end face and the outer end face of the exhaust side of the outer edge plate is ensured, and the blade is clamped on a blade positioning key end face machining clamping device, wherein the clamping steps are as follows: the bottom plate 1 is stably placed on the platform, the hexagonal thin nut 9 is pre-installed on the adjusting support 10 of the bottom plate 1, the adjusting support 10 of the bottom plate 1 is installed on the bottom plate 1, the adjusting support 10 of the bottom plate 1 is adjusted to a proper height, the hexagonal thin nut 9 is reversely screwed, and the adjusting support 10 of the bottom plate 1 is guaranteed to be fixed on the bottom plate 1; an equal length stud 11 is tightened in the same manner using a hex nut 9. The exhaust side positioning end faces of the inner and outer edge plates of the blade are arranged on a hard alloy block 6 (3), wedge faces of the basin sides of the inner and outer edge plates of the blade are abutted against positioning inclined planes (namely inclined plane positioning planes 2-1) of a positioning block 2 (2), and the flow channel surfaces of the blade are positioned and clamped by a positioning pin 5; then the pressing plate 4 is sleeved on the stud 11 through the middle groove,

the bottom plate 1 is adjusted and supported 10 to be against one end of the groove structure of the pressure plate 4, and the other end is pressed on the supporting plates of the inner and outer edge plates of the blade; and sequentially installing the bottom plate 13 and the spherical shoulder nut 8 on the stud 11, and screwing the spherical shoulder nut 8 to ensure stable blade clamping.

The hard alloy block 6 (3) is fixed on the bottom plate 1 in a welding mode, the positioning pin 5 is installed in a second positioning pin hole 3-1 on the support 3, and the positioning block 2 and the support 3 are fixed on the bottom plate 1 through a first positioning pin 12 (cylindrical pin) and an inner hexagonal cylindrical head screw 7.

From the above, it can be seen that the present invention has the following advantages: the positioning device is designed by combining the structural characteristics of the blade, the device is simple in structure, reasonable in positioning arrangement, convenient to clamp during machining, and capable of optimizing the operation of the blade machining process. The contact area between the wedge surface of the blade basin side of the inner and outer edge plates of the blade and the positioning block is large, so that the positioning stability of the blade is ensured; when the blade is disassembled, the spherical shoulder nut is loosened by using a wrench, and the pressing plate is pulled out backwards, so that the blade can be disassembled, the disassembling process is convenient, and the auxiliary work of the blade is reduced; the positioning device is compact in structure and low in manufacturing cost, and can be used for machining the end faces of positioning keys of turbine blades with other similar structures.