CN111203603B - Interchange clamping device for turbine disc - Google Patents

Interchange clamping device for turbine disc Download PDF

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Publication number
CN111203603B
CN111203603B CN201811388688.XA CN201811388688A CN111203603B CN 111203603 B CN111203603 B CN 111203603B CN 201811388688 A CN201811388688 A CN 201811388688A CN 111203603 B CN111203603 B CN 111203603B
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CN
China
Prior art keywords
base
positioning
clamping
turbine disc
flange
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CN201811388688.XA
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Chinese (zh)
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CN111203603A (en
Inventor
于建华
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AECC Commercial Aircraft Engine Co Ltd
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AECC Commercial Aircraft Engine Co Ltd
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Application filed by AECC Commercial Aircraft Engine Co Ltd filed Critical AECC Commercial Aircraft Engine Co Ltd
Priority to CN201811388688.XA priority Critical patent/CN111203603B/en
Publication of CN111203603A publication Critical patent/CN111203603A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H11/00Auxiliary apparatus or details, not otherwise provided for
    • B23H11/003Mounting of workpieces, e.g. working-tables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H5/00Combined machining
    • B23H5/04Electrical discharge machining combined with mechanical working
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING 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
    • B23H9/00Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects

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 first 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
Dowel pin 60
First flange end face 21
Second flange end face 22
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, the mounting edge of the turbine disk 50 is provided with a plurality of positioning holes, and the positioning pin holes 15 and the positioning holes are strictly corresponding and fixed through 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 are formed in the second flange end face 22 and connected with the base 10 through the clearance holes. 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 first 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 (4)

1. An interchange clamping device for a turbine disc is characterized by comprising 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 matched and connected with the flange shaft, 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 top surface of the base is provided with an outer annular hole, and the base is matched with the excircle of the mounting edge of the turbine disc to be processed through the outer annular hole; a plurality of positioning pin holes are formed in an 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;
the base body is of a cylindrical structure, a first flange end face is arranged at the upper end of the base body, a second flange end face is arranged at the lower end of the base body, and a plurality of clearance holes are formed in the second flange end face and are connected with the base through the clearance holes;
the gland part comprises a gland and a protective cover, and the protective cover is fixed at the upper end part of the gland to form an open tubular structure; an opening is formed in the center of the gland, a plurality of bolt clearance holes are formed in the periphery of the opening, and the gland is connected with the first flange end face of the base body through the bolt clearance holes;
the outer edge of the positioning tray is provided with a cross groove positioning mechanism, and the positioning tray is connected with the working mechanism through the cross groove positioning mechanism.
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 interchangeable clamping device for a turbine disk of claim 1, wherein the bottom surface of the base defines an internal bore, the internal bore being engaged with the flange shaft.
4. The interchangeable clamping device for a turbine disc of any of claims 1 to 3, wherein the axial length of the clamping device is less than the axial length of the turbine disc.
CN201811388688.XA 2018-11-21 2018-11-21 Interchange clamping device for turbine disc Active CN111203603B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811388688.XA CN111203603B (en) 2018-11-21 2018-11-21 Interchange clamping device for turbine disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811388688.XA CN111203603B (en) 2018-11-21 2018-11-21 Interchange clamping device for turbine disc

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Publication Number Publication Date
CN111203603A CN111203603A (en) 2020-05-29
CN111203603B true CN111203603B (en) 2021-04-20

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Application Number Title Priority Date Filing Date
CN201811388688.XA Active CN111203603B (en) 2018-11-21 2018-11-21 Interchange clamping device for turbine disc

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112296814A (en) * 2020-10-10 2021-02-02 南京航空航天大学 Clamping platform for forming and grinding machining of mortise of integral turbine disc and operation process of clamping platform
CN113523417A (en) * 2021-08-11 2021-10-22 无锡航亚科技股份有限公司 Broaching clamp design and hoisting method of ultrahigh turbine disc

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
JPS6445903A (en) * 1987-08-17 1989-02-20 Sumitomo Heavy Industries Jig for inserting turbine blade
US7765658B2 (en) * 2005-10-17 2010-08-03 Pratt & Whitney Canada Corp. Blade tip grinding tooling
CN202556106U (en) * 2012-05-18 2012-11-28 沈阳透平机械股份有限公司 Large-scale tire clamp for whole milling sealed impeller of five-coordinate boring and milling machining center
CN203509705U (en) * 2013-09-30 2014-04-02 沈阳黎明航空发动机(集团)有限责任公司 Quick centering fixture for wheel disc part
CN203712348U (en) * 2014-01-25 2014-07-16 重庆搏帆涡轮动力设备有限公司 Milling fixture for impeller of air compressor
CN104440151B (en) * 2014-10-31 2017-03-22 中国南方航空工业(集团)有限公司 Jigger clamp structure
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