Five-axis concentric clamp for machining turbine blade

Abstract

The utility model relates to a five-axis concentric fixture for processing steam turbine blades, which comprises four groups of rear connecting seats which are annularly and uniformly distributed, each rear connecting seat comprises a longitudinal rear connecting plate, a longitudinal first T-shaped clamping strip is formed on the outer end face of each rear connecting plate, and a connecting block is formed on the inner end face of each rear connecting plate; two groups of vertically staggered front connecting seats are arranged on the front side of the connecting block, each front connecting seat comprises a vertical front connecting plate, a second T-shaped clamping strip parallel to the front connecting plate is formed on the front end face of each front connecting plate, and a clamping seat perpendicular to the front connecting plate is formed in the middle of the rear end face of each front connecting plate; and a T-shaped clamping groove parallel to the clamping seat is formed in the clamping seat. The five-axis concentric clamp is simple and compact in structure, all the components can be restrained mutually, concentric setting is rapidly achieved, and assembling and disassembling are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vane machining fixture, more specifically to five -axis concentric fixture for steam turbine vane machining. BACKGROUND

[0002] The regulating stage vane is the first stage vane assembled on the steam turbine rotor, and the regulating stage vane is provided with a plurality of steam passage profiles, and at present, a plurality of numerical control machine tools are used to respectively and independently process the plurality of steam passage profiles on the regulating stage vane. UTILITY MODEL CONTENTS

[0003] The five-axis concentric fixture for steam turbine vane machining is simple in structure, the components can be constrained with each other, concentric setting can be quickly realized, and the five-axis concentric fixture is convenient to assemble and disassemble.

[0004] The five-axis concentric fixture for steam turbine vane machining comprises four groups of rear connection seats which are uniformly distributed in a ring shape, wherein the rear connection seat comprises a longitudinal rear connection plate, a first T-shaped clamping strip is formed on the outer end face of the rear connection plate in a longitudinal direction, and a connection block is formed on the inner end face of the rear connection plate; the front side of the connection block is provided with two groups of front connection seats which are perpendicular and staggered; the front connection seat comprises a vertical front connection plate; a second T-shaped clamping strip parallel to the front connection plate is formed on the front end face of the front connection plate; a clamping groove in a T shape and parallel to the clamping seat is formed on the clamping seat of the rear end face of the front connection plate;

[0005] The second T-shaped clamping strip on the front connection seat on the rear side is clamped in the clamping groove of the front connection seat on the front side, the clamping seat on the front connection seat on the rear side abuts against the connection block of the four groups of rear connection seats respectively, a longitudinal T-shaped bolt is inserted into the clamping groove, and the T-shaped bolt is inserted between the connection blocks; the end portions of the front connection plates on the two groups of front connection seats abut against the rear connection plates of the four groups of rear connection seats respectively;

[0006] The rear side of the adapter block is provided with a longitudinal connecting column, and a plurality of supporting lugs are formed on the outer wall of the connecting column; the rear end face of the adapter block is formed with two groups of opposite lug seats, the supporting lugs are respectively inserted between the lug seats of the adapter block and are inserted with a pin shaft, and the two ends of the pin shaft are inserted and fixed in the lug seats; a stepped hole penetrating through the front end face of the connecting column is formed on the rear end face of the connecting column, the rear end of a T-shaped bolt is inserted into the stepped hole of the connecting column and is screwed with a locking nut, and the locking nut abuts against the stepped face of the stepped hole; a circular clamping disc is sleeved on the second T-shaped clamping strip of the front adapter seat and the first T-shaped clamping strip of the rear adapter seat, a plurality of annularly and uniformly distributed positioning screw holes are formed on the clamping disc, and positioning bolts are inserted into the clamping disc and are screwed into the positioning screw holes of the clamping disc.

[0007] Preferably, the central axes of the clamping discs on the rear adapter seats are in the same plane and are perpendicular to the central axis of the connecting column.

[0008] Preferably, the clamping disc comprises a circular base disc, a circular positioning boss is formed in the middle of one side end face of the base disc, a rectangular connecting seat is formed in the middle of the other side end face, a T-shaped clamping groove is formed on the connecting seat, and the first T-shaped clamping strip and the second T-shaped clamping strip are respectively inserted into the clamping groove of the connecting seat.

[0009] Two rear mounting holes are respectively formed at the two ends of the rear adapter plate, and two front mounting holes are respectively formed at the two ends of the front adapter plate, and the positioning bolts are respectively inserted into the front mounting holes and the rear mounting holes.

[0010] Preferably, the central axis of the base disc and the central axis of the positioning boss coincide, and the positioning screw holes are at least four and are annularly and uniformly distributed around the central axis of the base disc.

[0011] Preferably, a notch penetrating through the inner end face of the adapter block is formed on the rear end face of the adapter block on the rear adapter seat, the front end of the connecting column is inserted into the notch of the adapter block and abuts against the bottom face of the notch, the bottom face of the notch is formed with a stepped adapter hole, a screw is inserted into the adapter hole, and the tail end of the screw is screwed and fixed on the connecting column.

[0012] Preferably, the central axis of the clamping disc on the front side of the front adapter seat and the central axis of the connecting column are on the same straight line.

[0013] The utility model discloses the beneficial effect lies in:

[0014] The five-axis concentric clamp has simple and compact structure, and the components can be constrained to each other, so that the concentric setting is quickly realized, and the clamp is convenient to assemble and disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a partial sectional view of the utility model from the side;

[0016] Fig. 2 It is the rear view structure schematic diagram of the utility model without connecting column;

[0017] Fig. 3 It is the structure schematic diagram of the inner rear link seat of the utility model;

[0018] Fig. 4 It is the structure schematic diagram of the inner front link seat of the utility model;

[0019] Fig. 5 It is the half cutaway schematic diagram of the utility model inner chuck.

[0020] In the drawing: 1, rear link seat;11, rear link plate;12, first T-shaped clamping strip;13, link block;14, ear seat;15, 14, ear seat;2,;21, front link plate;22, second T-shaped clamping strip;23, clamping seat;24, clamping groove;25, front mounting hole;3, chuck;31, base plate;32, positioning boss;33, connecting seat;34, buckle groove;35, positioning screw hole;4, T-shaped bolt;5, connecting column;51, lug;52, stepped hole;6, pin shaft;7, locking nut;8, screw. DETAILED DESCRIPTION

[0021] Embodiment: see Figs. 1 to 5 As shown in the drawing, the five-axis concentric clamp for steam turbine blade machining, including four groups of annular uniform distribution rear link seat 1, rear link seat 1 includes longitudinal rear link plate 11, the outer end surface of rear link plate 11 is formed with longitudinal first T-shaped clamping strip 12, the inner end surface is formed with link block 13, the front side of link block 13 is provided with two groups of vertical staggered front link seat 2, front link seat 2 includes vertical front link plate 21, the front end surface of front link plate 21 is formed with second T-shaped clamping strip 22 parallel to front link plate 21, the middle part of rear end surface is formed with clamping seat 23 perpendicular to front link plate 21, clamping seat 23 is formed with T-shaped clamping groove 24 parallel to clamping seat 23;

[0022] The second T-shaped clamping strip 22 on the rear side of front link seat 2 is clamped in the clamping groove 24 of the front side of front link seat 2, the clamping seat 23 on the rear side of front link seat 2 abuts on the link block 13 of four groups of rear link seat 1 respectively, the T-shaped bolt 4 is inserted in the clamping groove 24 and the link block 13, and the T-shaped bolt 4 is inserted between the link block 13;The end of the front link plate 21 of the two groups of front link seat 2 abuts on the rear link plate 11 of four groups of rear link seat 1 respectively;

[0023] The rear side of the adapter block 13 is provided with a longitudinal connecting column 5, and a plurality of supporting lugs 51 are formed on the outer wall of the connecting column 5; the rear end face of the adapter block 13 is formed with two groups of opposite lug seats 14, the supporting lugs 51 are respectively inserted between the lug seats 14 of the adapter block 13 and are inserted with a pin shaft 6, both ends of the pin shaft 6 are inserted and fixed in the lug seats 14; a stepped hole 52 penetrating the front end face of the connecting column 5 is formed on the rear end face of the connecting column 5, the rear end of a T-shaped bolt 4 is inserted into the stepped hole 52 of the connecting column 5 and is screwed with a locking nut 7, the locking nut 7 abuts against the stepped face of the stepped hole 52; a circular clamping disc 3 is sleeved on the second T-shaped clamping strip 22 of the front adapter seat 2 and the first T-shaped clamping strip 12 of the rear adapter seat 1, a plurality of annularly and uniformly distributed positioning screw holes 35 are formed on the clamping disc 3, and positioning bolts are inserted into the front adapter seat 2 and the rear adapter seat 1 and are screwed into the positioning screw holes 35 of the clamping disc 3.

[0024] The central axes of the clamping discs 3 on the rear adapter seat 1 are in the same plane and are perpendicular to the central axis of the connecting column 5, that is, the plane in which the central axes of the clamping discs 3 are perpendicular to the connecting column 5.

[0025] The clamping disc 3 comprises a circular base disc 31, a circular positioning boss 32 is formed in the middle of one side end face of the base disc 31, and a rectangular connecting seat 33 is formed in the middle of the other side end face, a T-shaped clamping groove 34 is formed on the connecting seat 33, and the first T-shaped clamping strip 12 and the second T-shaped clamping strip 22 are respectively inserted into the clamping groove 34 of the connecting seat 33; the clamping disc 3 is connected with the rear adapter seat 1 or the rear adapter seat 2 by buckling, and is positioned by the positioning bolt.

[0026] Two rear mounting holes 15 are respectively formed at both ends of the rear adapter plate 11, and two front mounting holes 25 are respectively formed at both ends of the front adapter plate 21, and the positioning bolts are respectively inserted into the front mounting holes 25 and the rear mounting holes 15.

[0027] The central axis of the base disc 31 coincides with the central axis of the positioning boss 32, and the positioning screw holes 35 are at least four and are annularly and uniformly distributed around the central axis of the base disc 31.

[0028] A notch penetrating the inner end face of the adapter block 13 is formed on the rear end face of the adapter block 13 on the rear adapter seat 1, the front end of the connecting column 5 is inserted into the notch of the adapter block 13 and abuts against the bottom face of the notch, the bottom face of the notch is formed with a stepped adapter hole 16, a screw 8 is inserted into the adapter hole 16, and the end of the screw 8 is screwed and fixed on the connecting column 5, and the screw 8 is used for reinforcement.

[0029] The central axis of the clamping disc 3 on the front side of the front adapter seat 2 is in line with the central axis of the connecting column 5.

[0030] Working principle: the structure is five-axis concentric fixture for steam turbine blade machining, the concentric fixture is provided with five clamping discs 3 for loading blades, the clamping disc 3 is connected with the rear adapter seat 1 and the front adapter seat 2 in communication respectively by adopting T-shaped buckle structure, the rear adapter seat 1 is provided with four groups and is distributed around the connecting column 5, the positioning of the radial position of the rear adapter seat 1 is realized by the constraint of the end of the two groups of front adapter seats 2, while the axial position of the rear adapter seat 1 is positioned by the lug seat 14 and the lug 51, and the fixation of the rear adapter seat 1 is also realized by the pin shaft 6;

[0031] And the front adapter seat 2 is fixed with the connecting column 5 by T-shaped bolt 4 and locking nut 7; the components realize mutual constraint, can realize quick positioning, and then facilitate assembly.

[0032] The embodiments are used to illustrate the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be as the claims of the utility model.

Claims

1. A five-axis concentric fixture for processing steam turbine blades, comprising four groups of annularly and uniformly distributed rear adapter seats (1), the rear adapter seat (1) comprising a longitudinal rear adapter plate (11), a longitudinal first T-shaped clamping strip (12) being formed on the outer end face of the rear adapter plate (11), and an adapter block (13) being formed on the inner end face of the rear adapter plate (11), characterized in that: The front side of the adapter block (13) is provided with two groups of front adapter seats (2) vertically staggered, the front adapter seat (2) comprises a vertical front adapter plate (21), the front end face of the front adapter plate (21) is formed with a second T-shaped clamping strip (22) parallel to the front adapter plate (21), the middle part of the rear end face is formed with a clamping groove (23) perpendicular to the front adapter plate (21), and the clamping groove (23) is formed with a T-shaped clamping groove (24) parallel to the clamping groove (23); The second T-shaped clamping strip (22) on the front adapter seat (2) of the rear side is clamped in the clamping groove (24) of the front adapter seat (2) of the front side, the clamping groove (23) on the front adapter seat (2) of the rear side abuts against the adapter block (13) of the four groups of rear adapter seats (1) respectively, the clamping groove (24) is inserted with a longitudinal T-shaped bolt (4), and the T-shaped bolt (4) is inserted between the adapter blocks (13); the end of the front adapter plate (21) on the two groups of front adapter seats (2) abuts against the rear adapter plate (11) of the four groups of rear adapter seats (1) respectively; The rear side of the adapter block (13) is provided with a longitudinal connecting column (5), and the outer wall of the connecting column (5) is formed with a plurality of supporting ears (51); the rear end face of the adapter block (13) is formed with two groups of opposite ear seats (14), the supporting ears (51) are respectively inserted between the ear seats (14) of the adapter block (13) and are inserted with a pin shaft (6), and the two ends of the pin shaft (6) are inserted and fixed in the ear seats (14); the rear end face of the connecting column (5) is formed with a stepped hole (52) penetrating through the front end face of the connecting column (5), the rear end of the T-shaped bolt (4) is inserted into the stepped hole (52) of the connecting column (5) and is screwed with a locking nut (7), and the locking nut (7) abuts against the stepped face of the stepped hole (52); the second T-shaped clamping strip (22) of the front adapter seat (2) of the front side and the first T-shaped clamping strip (12) of the rear adapter seat (1) are sleeved with a circular clamping disc (3), the clamping disc (3) is formed with a plurality of annularly and uniformly distributed positioning screw holes (35), and the front adapter seat (2) and the rear adapter seat (1) are inserted with positioning bolts, and the positioning bolts are respectively screwed in the positioning screw holes (35) of the clamping disc (3).

2. A five-axis concentric fixture for turbine blade machining according to claim 1, characterized in that: The central axes of the clamping discs (3) on the rear adapter seats (1) are in the same plane and are perpendicular to the central axis of the connecting column (5).

3. A five-axis concentric fixture for turbine blade machining according to claim 2, characterized in that: The clamping disc (3) comprises a circular bottom disc (31), the middle part of one side end face of the bottom disc (31) is formed with a circular positioning boss (32), the middle part of the other side end face is formed with a rectangular connecting seat (33), the connecting seat (33) is formed with a T-shaped buckle groove (34), and the first T-shaped clamping strip (12) and the second T-shaped clamping strip (22) are respectively inserted in the buckle groove (34) of the connecting seat (33); The two ends of the rear adapter plate (11) are respectively formed with rear mounting holes (15), and the two ends of the front adapter plate (21) are respectively formed with front mounting holes (25); the positioning bolts are respectively inserted into the front mounting holes (25) and the rear mounting holes (15).

4. A five-axis concentric fixture for turbine blade machining according to claim 3, characterized in that: The center axis of the bottom disc (31) coincides with the center axis of the positioning boss (32), and the positioning screw holes (35) are at least four and evenly distributed in a ring around the center axis of the bottom disc (31).

5. The five-axis concentric fixture for turbine blade machining of claim 1, wherein: The rear end surface of the connecting block (13) on the rear adapter seat (1) is formed with a notch penetrating the inner end surface of the connecting block (13), the front end of the connecting column (5) is inserted into the notch of the connecting block (13) and abuts against the bottom surface of the notch, the bottom surface of the notch is formed with a stepped adapter hole (16), the adapter hole (16) is inserted with a screw (8), and the tail end of the screw (8) is screwed and fixed on the connecting column (5).

6. A five-axis concentric fixture for turbine blade machining according to claim 1 or 4, characterized in that: The center axis of the clamping disc (3) on the front side of the front adapter seat (2) coincides with the center axis of the connecting column (5).

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