CN111203603A

CN111203603A - Interchange clamping device for turbine disc

Info

Publication number: CN111203603A
Application number: CN201811388688.XA
Authority: CN
Inventors: 于建华
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2020-05-29
Anticipated expiration: 2038-11-21
Also published as: CN111203603B

Abstract

The invention provides an interchange clamping device for a turbine disc, which comprises a base, a base body, a gland part and a positioning tray, wherein a flange shaft is arranged in the base, the bottom end of the base body is connected with the flange shaft in a matched mode, the gland part is locked with the top end face of the base body, the positioning tray is arranged on the lower bottom face of the base, and the interchange clamping device is connected to a working mechanism through the positioning tray. The interchanging clamping device for the turbine disc can realize high-rigidity clamping of the turbine disc, can accurately convert positioning references among different machining procedures, and does not need manual alignment. The clamping device can be used for machining the turbine disc mortise by combining online cutting and forming grinding, is an important carrier for realizing a machining process method with high precision, high efficiency and low cost for the turbine disc mortise, and is low in manufacturing cost of equipment required by the process, so that the composite machining process is easy to popularize and apply.

Description

Interchange clamping device for turbine disc

Technical Field

The invention relates to the field of turbofan engines, in particular to an interchange clamping device for a turbine disc.

Background

In the field of turbofan engines, in order to meet the requirements of high thrust-weight ratio and weight reduction of a new generation of turbofan engine with a large bypass ratio, a double-wing mounting edge structure with a larger wheel disc diameter and higher integration level is designed, a large-depth semi-closed thin-wall drum cavity is formed by a mounting edge and a radial plate, and the overall structure is extremely complex.

However, the turbine disk mortise is generally processed by shaping milling, broaching, or the like. With the progress of the electric machining technology and the superabrasive grinding technology in recent years, a combined machining mode of wire cutting and form grinding is beginning to be applied to the mortise machining of a turbine disk. In the conventional broaching or milling process, because the cutting force is large, in order to maintain the processing rigidity, the end surface of the mortise positioned at the outermost ring of the turbine disc is often used as a pressing surface to improve the rigidity.

Because other parts are sheltered from, the structure can only use the center hole of the turbine disc as a positioning hole, so that the clamp is large in size and heavy in structure, and the positioning error is amplified because the center hole is far away from the mortise position at the outermost ring. Above-mentioned anchor clamps structure is mostly simple two gland structures, and the last lower process can't be used, if the secondary clamping also need look for the location benchmark again, the chip breaking ring on the anchor clamps can only be used once even, causes the material extravagant.

In view of the above, those skilled in the art have made an effort to develop a new interchangeable clamping device for mortise machining of a turbine disk, so as to overcome the above-mentioned problems.

Disclosure of Invention

The invention aims to overcome the defects of large size, heavy structure, large positioning error and the like of a clamp used for processing a mortise of a turbine disc in the prior art, and provides an interchangeable clamping device for the turbine disc.

The invention solves the technical problems through the following technical scheme:

the utility model provides an exchange clamping device for turbine disc, its characterized in that, exchange clamping device includes base, base member, gland part and location tray, be provided with the flange axle in the base, the bottom of base member with the flange axle cooperation is connected, the gland part with the top end face locking of base member, the location tray is installed the lower bottom surface of base, exchange clamping device pass through the location tray is connected in operating device.

According to one embodiment of the invention, the base is of a multi-step flange structure, and a plurality of lightening holes are formed in the base and surround the flange shaft.

According to one embodiment of the invention, the top surface of the base is provided with an outer annular hole through which the base is fitted with the outer circle of the mounting edge of the turbine disc to be machined.

According to one embodiment of the invention, a plurality of positioning pin holes are formed in the outer flange of the base, a plurality of positioning holes are formed in the mounting edge of the turbine disc, and the positioning pin holes correspond to the positioning holes and are fixed through positioning pins.

According to one embodiment of the invention, the base body is of a cylindrical structure, the upper end of the base body is provided with a first flange end face, the lower end of the base body is provided with a second flange end face, and the second flange end face is provided with a plurality of clearance holes through which the base body is connected with the base.

According to one embodiment of the invention, the bottom surface of the base body is provided with an inner hole, and the inner hole is matched with the flange shaft.

According to one embodiment of the invention, the gland portion includes a gland and a shield secured to an upper end of the gland to form an open tubular structure.

According to one embodiment of the invention, the gland is provided with an opening in the center, a plurality of bolt clearance holes are arranged around the opening, and the gland is connected with the second flange end face of the base body through the bolt clearance holes.

According to one embodiment of the invention, the outer edge of the positioning tray is provided with a cross-shaped groove positioning mechanism, and the positioning mechanism is connected with the working mechanism through the cross-shaped groove positioning mechanism.

According to one embodiment of the invention, the axial length of the clamping device is smaller than the axial length of the turbine disc.

The positive progress effects of the invention are as follows:

the interchanging clamping device for the turbine disc can realize high-rigidity clamping of the turbine disc, can accurately convert positioning references among different machining procedures, and does not need manual alignment. The clamping device can be used for machining the turbine disc mortise by combining online cutting and forming grinding, is an important carrier for realizing a machining process method with high precision, high efficiency and low cost for the turbine disc mortise, and is low in manufacturing cost of equipment required by the process, so that the composite machining process is easy to popularize and apply.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:

fig. 1 is a top view of an interchangeable clamp for a turbine disk of the present invention.

Fig. 2 is a cross-sectional view taken along line M-M of fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is an exploded view of the interchangeable clamping device for a turbine disk of the present invention.

Fig. 5 is a perspective view of a positioning tray in the interchangeable clamping device for a turbine disk of the present invention.

Fig. 6 is a perspective view of the cover pressing part of the interchangeable clamping device for the turbine disc of the invention.

[ reference numerals ]

Base 10

Base body 20

Gland portion 30

Positioning tray 40

Flange shaft 11

Lightening hole 12

Outer annular hole 13

Turbine disk 50

Outer flange 14

Dowel pin hole 15

Positioning hole 51

Dowel pin 60

First flange end face 21

Second flange end face 22

Clearance hole 23

Gland 31

Protective cover 32

Opening 33

Bolt clearance hole 34

Screw hole 35

Hanging ring 36

Cross slot positioning mechanism 41

M10 socket head cap screw 70

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.

Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

Fig. 1 is a top view of an interchangeable clamp for a turbine disk of the present invention. Fig. 2 is a cross-sectional view taken along line M-M of fig. 1. Fig. 3 is an enlarged view of a portion a in fig. 1. Fig. 4 is an exploded view of the interchangeable clamping device for a turbine disk of the present invention. Fig. 5 is a perspective view of a positioning tray in the interchangeable clamping device for a turbine disk of the present invention. Fig. 6 is a perspective view of the cover pressing part of the interchangeable clamping device for the turbine disc of the invention.

As shown in fig. 1 to 6, the present invention discloses an interchangeable clamping device for a turbine disk, which comprises a base 10, a base 20, a gland portion 30 and a positioning tray 40, wherein a flange shaft 11 is arranged in the base 10, the bottom end of the base 20 is in fit connection with the flange shaft 11, the gland portion 30 is locked with the top end face of the base 20, the positioning tray 40 is installed on the lower bottom surface of the base 10, and the interchangeable clamping device is connected to a working mechanism (not shown) through the positioning tray 40.

Specifically, the positional connection and structural relationship of each component in the interchangeable clamping device are as follows: the base 10 is located at the bottom end of the overall device, the base 20 is located in the middle of the overall device, and the capping portion 30 is located at the top end of the overall device. The base body 20 is connected with a flange shaft matched T2 in the base 10 through an inner hole at the bottom end, and is locked through four inner hexagon screws. The gland portion 30 is locked with the top end surface of the base body 20 by six hexagon socket head cap bolts. The positioning tray 40 is arranged on the lower bottom surface of the base 10, and the whole clamping device is connected to working mechanisms such as a machine tool and a measuring machine through the positioning tray 40.

Preferably, the base 10 adopts a multi-step flange structure, and a plurality of lightening holes 12 are formed in the base 10, for example, six lightening holes are uniformly distributed on the disk spokes in the embodiment, so that the lightening holes 12 surround the flange shaft 11. The top surface of the base 10 is provided with an outer annular hole 13, where the outer annular hole 13 is a turbine disk mounting hole, so that the base 10 is fitted with the outer circle of the mounting edge of the turbine disk 50 to be machined through the outer annular hole 13T 1. T1 shows the matching between the outer annular hole on the top surface of the base of the clamping device and the outer circle of the mounting edge of the turbine disc, and T2 shows the matching between the inner hole on the bottom surface of the base of the clamping device and the inner flange shaft of the base.

In addition, the outer flange 14 of the base 10 is further provided with a plurality of positioning pin holes 15, a plurality of positioning holes 51 are formed on the mounting edge of the turbine disk 50, and the positioning pin holes 15 and the positioning holes 51 are strictly corresponding and fixed by positioning pins 60. Thus, the turbine disc 50 to be machined can form one-surface two-hole fit by the outer annular hole 13 and the positioning pin hole 15, and accurate limit of the turbine disc 50 is guaranteed.

Further, the base body 20 is a cylindrical structure, a first flange end face 21 is arranged at the upper end of the base body 20, a second flange end face 22 is arranged at the lower end of the base body 20, and a plurality of clearance holes 23 are formed in the second flange end face 22 and connected with the base 10 through the clearance holes 23. In addition, an inner hole (not shown) is formed in the bottom surface of the base body 20, and the flange shaft 11 is engaged through the inner hole. The base body 20 is matched with the flange shaft 11 in the base 10 through a bottom surface inner hole T2, four bolt clearance holes are processed on the second flange end surface 22 connected with the base 10, and six threaded holes are processed on the first flange end surface 21 connected with the gland part 30.

Preferably, the capping portion 30 includes a capping 31 and a shield 32, and the shield 32 is fixed to an upper end portion of the capping 31 to form an open cylindrical structure. An opening 33 is provided in the center of the gland 31, a plurality of bolt clearance holes 34 are arranged around the opening 33, and the gland 31 is connected to the second flange end face 22 of the base body 20 through the bolt clearance holes 34. In this embodiment, the gland 31 and the protection cover 32 are combined together by welding to form an open tubular structure. The center of the gland 31 is provided with a hole, six bolt clearance holes are uniformly distributed around the center hole, three screw holes 35 are uniformly distributed at the outermost periphery, and the screw holes 35 are suspension ring connecting holes and are used for connecting suspension rings 36.

More preferably, the outer edge of the positioning tray 40 is provided with a cross-slot positioning mechanism 41, and is connected with an operating mechanism (not shown) through the cross-slot positioning mechanism 41.

According to the structural description, the axial length D of the interchanging clamping device for the turbine disc is smaller than the axial length D of the turbine disc 50, and the turbine disc 50 can be locked on the interchanging clamping device by tightening six socket head cap screws. D represents the axial length from the top surface of the central spoke of the turbine disc to the end surface of the mounting edge; d is the axial length of the top surface of the base body of the clamping device from the end surface of the mounting edge.

The base 10 and the base body 20 of the interchangeable clamping device are not detached after being installed, and a fixed connecting mechanism is formed. The turbine disc 50 workpiece is positioned between the base 10 and the gland part 30, the inner hole of the turbine disc 50 penetrates through the base body 20, the turbine disc is positioned on the clamp through the two holes formed in the mounting hole and the positioning pin hole of the base 10, and the positioning pin penetrates through the base 10 and the positioning pin hole of the turbine disc in an interference fit mode.

The interchangeable clamping device is connected with a machine tool, a measuring machine and the like through a positioning tray 40 arranged on the lower bottom surface of the base 10, so that the positioning reference of a workpiece is converted to the positioning tray 40 with high positioning precision, and the interchangeable clamping device can be rapidly interchanged on different machine tools and measuring machines. The positioning tray 40 adopts a cross slot positioning mode to precisely position with positioning trays positioned on a machine tool and a measuring machine, and micron-scale interchangeability positioning precision is kept between any tray and any positioning tray.

According to the structure of the interchanging clamping device for the turbine disc, the overall installation mode is as follows: six lightening holes 12 are uniformly distributed on the disc spokes of the base 10, the base body 20 is matched with the flange shaft 11 on the top surface of the base 10 through the flange holes on the lower bottom surface of the base body to keep the relative position, and is locked through four fixing pieces, such as M10 hexagon socket head cap screws 70, so that a fixing mechanism is formed. The gland 31 and the boot 32 are combined together into a gland portion by welding. Thus, the bottom plate 10, the base body 20 and the gland part 30 form a positioning and clamping mechanism of the whole turbine disc mortise machining clamp. The positioning tray 40 is installed on the bottom surface of the base 10 of the whole fixture, so that the whole fixture is connected with a machine tool, a measuring machine and the like through a cross slot positioning mechanism of the positioning tray 40, the positioning reference of a workpiece is converted to the positioning tray 40 with high positioning precision, the positioning tray can be quickly interchanged on different machine tools and measuring machines, and the interchangeability positioning precision of 0.003mm is kept between any tray and any positioning tray.

When the fixture is used for clamping, the disk center hole of the turbine disk 50 penetrates through the fixture base shaft, and the flange surface of the mounting edge of the turbine disk 50 is matched with the concave annular positioning hole of the fixture base 10 to form a matching relation T1. The turbine disk is then clamped by the gland portion 30 and can be lifted to a station to be machined or measured by three lifting rings 36 above the gland. Finally, the locking is carried out on the stations of the respective machine tool by means of the positioning tray 40.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. The utility model provides an exchange clamping device for turbine disc, its characterized in that, exchange clamping device includes base, base member, gland part and location tray, be provided with the flange axle in the base, the bottom of base member with the flange axle cooperation is connected, the gland part with the top end face locking of base member, the location tray is installed the lower bottom surface of base, exchange clamping device pass through the location tray is connected in operating device.

2. The interchange clamping device for the turbine disc as claimed in claim 1, wherein the base is a multi-step flange structure, and a plurality of lightening holes are formed in the base and surround the flange shaft.

3. The interchange clamping device for the turbine disc as claimed in claim 2, wherein the top surface of the base is provided with an outer annular hole through which the base is engaged with the outer circle of the mounting edge of the turbine disc to be machined.

4. The interchange clamping device for the turbine disc as claimed in claim 3, wherein a plurality of positioning pin holes are formed in the outer flange of the base, a plurality of positioning holes are formed in the mounting edge of the turbine disc, and the positioning pin holes correspond to the positioning holes and are fixed through positioning pins.

5. The interchangeable clamping device for a turbine disc as claimed in claim 1, wherein the base body is a cylindrical structure, and a first flange end face is provided at an upper end of the base body, and a second flange end face is provided at a lower end of the base body, and the second flange end face is provided with a plurality of clearance holes, and is connected with the base through the clearance holes.

6. The interchangeable clamping device for a turbine disk of claim 5, wherein the bottom surface of the base defines an internal bore, the internal bore engaging the flange shaft.

7. The interchange clamping apparatus for a turbine disk as recited in claim 5, wherein said gland portion includes a gland and a shield, said shield being secured to an upper end portion of said gland to form an open tubular structure.

8. The interchange clamping device for a turbine disk according to claim 7, wherein an opening is provided in the center of the gland, a plurality of bolt clearance holes are arranged around the opening, and the gland is connected with the second flange end face of the base body through the bolt clearance holes.

9. The interchange clamping device for a turbine disc as claimed in claim 5, wherein the outer edge of the positioning tray is provided with a cross-shaped groove positioning mechanism, and the cross-shaped groove positioning mechanism is connected with the working mechanism.

10. The interchangeable clamp for a turbine disk of any of claims 1 to 9, wherein the axial length of the clamp is less than the axial length of the turbine disk.