CN111702536B

CN111702536B - Positioning device

Info

Publication number: CN111702536B
Application number: CN202010612936.5A
Authority: CN
Inventors: 延梦莹; 张小莉; 郭相峰; 梁冬冬; 高锋利; 杨伟; 罗俊; 党小莉
Original assignee: AECC Aviation Power Co Ltd
Current assignee: AECC Aviation Power Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-02-11
Anticipated expiration: 2040-06-30
Also published as: CN111702536A

Abstract

The invention discloses a positioning device, wherein a first positioning block and a third positioning block are uniformly distributed and installed on a base, and are distributed at intervals; an area for placing the casting block with the blade is reserved between the adjacent first positioning block and the adjacent third positioning block, the adjacent first positioning block and the adjacent third positioning block are used for clamping a pair of side faces of the casting block, one end of each of the first positioning block and the third positioning block is provided with a top block, and the top blocks on the first positioning block and the third positioning block are used for clamping the end parts of the blade from the two side faces of the blade respectively; a second positioning block is arranged on one end, opposite to the blade, of each pouring block on the base, and the second positioning blocks are abutted to the pouring blocks; the first positioning block or the third positioning block is connected with a pressing plate, and the pressing plate is used for pressing two adjacent casting blocks positioned on two sides of the first positioning block or two sides of the third positioning block. The invention solves the problems that the efficiency of the rotor blade is low when the tenon arc tooth is machined, and the positioning device is difficult to optimize.

Description

Positioning device

Technical Field

The invention belongs to the technology of machining of blades, and relates to a positioning device for lathing tenon arc teeth of a plurality of rotor blades.

Background

For the efficiency and the quality that improve rotor blade processing, carry out pouring tin bismuth alloy behind the precision positioning to the blade, the alloy structure is the cuboid, wrap up in the outside of blade, only the blade tenon position that will process exposes the one end of pouring piece, make 6 point positioning benchmark of blade convert to on 3 planes of square tin ratio alloy, the selection requirement of 3 datum planes guarantees that blade tenon arc tooth is in can the car processing state, make the frock structure simplify after the benchmark conversion, the location compresses tightly reliably. When a certain machine rotor blade is used for lathing the tenon arc teeth of the blade, the original scheme is that the blade with a pouring block is independently positioned and compressed, a disc can only machine 10 blades, the number of the blades for installing the engine is 30, the number of the blades machined by the structure once is small, the efficiency is low, and the requirement is difficult to meet. In order to improve the efficiency, the structure of the existing lathe fixture needs to be optimized, and the number of the blades machined at one time needs to be increased. The arc teeth of the tenons of the lathed blades are cut intermittently, so that the impact force is large. Therefore, the positioning and pressing mechanism of the positioning device needs to have enough rigidity and strength, on the other hand, the number of the blades machined at one time is increased to the maximum extent, the positioning and clamping space of a single blade is reduced, the rigidity is guaranteed, and how to optimize the positioning device solves the technical problem to be solved by technical personnel in the field.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a positioning device, and solves the problems that the efficiency of a rotor blade is low when a tenon arc tooth is machined, and the positioning device is difficult to optimize.

The technical scheme adopted by the invention is as follows:

a positioning device comprises a base, a first positioning block, a second positioning block, a third positioning block and a top block; the base is of a circular ring-shaped structure, a plurality of first positioning blocks and a plurality of third positioning blocks are arranged, the first positioning blocks and the third positioning blocks are uniformly distributed and installed on the base, and the first positioning blocks and the third positioning blocks are distributed at intervals; an area for placing the casting block with the blade is reserved between the adjacent first positioning block and the adjacent third positioning block, the adjacent first positioning block and the adjacent third positioning block are used for clamping a pair of side faces of the casting block, one end of each of the first positioning block and the third positioning block is provided with a top block, and the top blocks on the first positioning block and the third positioning block are used for clamping the end parts of the blade from the two side faces of the blade respectively; a second positioning block is arranged at one end of each pouring block, which is opposite to the blade, and is connected with the base, and the second positioning blocks are abutted against the pouring blocks; the first positioning block or the third positioning block is connected with a pressing plate, and the pressing plate is used for pressing two adjacent casting blocks positioned on two sides of the first positioning block or two sides of the third positioning block.

Preferably, one side surface of the casting block is a casting block positioning surface, and the other side surface of the casting block is a casting block pressing surface; the side of one side of the first positioning block and the side of one side of the third positioning block are both provided with positioning surfaces, the other side of the first positioning block and the other side of the third positioning block are provided with wedge blocks used for applying jacking force to the casting block pressing surface, and the positioning surfaces of the first positioning block and the third positioning block are abutted to the casting block positioning surfaces.

Preferably, a wedge chute is formed in each of the first positioning block and the third positioning block, the wedge is arranged in the wedge chute, the wedge is connected with the bottom of the wedge chute through a first screw, the first screw penetrates through the wedge, and a hole through which the first screw penetrates in the wedge is a waist-shaped hole.

The bottom of the wedge block is provided with a pin, the bottom surface of the wedge block chute is provided with a pin chute for accommodating the pin, and the pin chute is internally provided with an elastic element which is used for providing elastic force for the wedge block, so that the end surface of the wedge block does not protrude out of the side surfaces of the first positioning block and the third positioning block.

Preferably, the top blocks on the first positioning block and the third positioning block respectively comprise a first top block and a second top block which are symmetrically arranged, the first top block and the second top block are both L-shaped, one ends of the first top block and the second top block are rotatably connected with the first positioning block and the third positioning block, the other ends of the first top block and the second top block respectively extend to two sides of the first positioning block and two sides of the third positioning block, and the sections of the first top block and the second top block are respectively propped against two side faces of the blade; the adjacent limit of first kicking block and second kicking block all is equipped with half taper hole, and half taper hole on the first kicking block and half taper hole on the second kicking block constitute a taper hole, be equipped with the taper ring that the tapering is the same in the taper hole, the taper ring passes through bolted connection with first locating piece and with the third locating piece.

Preferably, the pressing plate is of a flat plate structure, the pressing plate is connected with the first positioning block or the third positioning block through a stud, and the bottom surfaces of the two ends of the pressing plate press the top surfaces of the casting blocks on the two sides of the first positioning block or the third positioning block.

Preferably, the stud penetrates through the third positioning block and is in threaded connection with the base, and the stud is connected with a nut which is used for fixedly connecting the third positioning block with the base; the hole of the pressing plate for the stud to pass through is a through hole, and the stud is also connected with a nut which is used for pressing the pressing plate downwards so that the bottom surfaces at the two ends of the pressing plate press the top surfaces of the pouring blocks at the two sides of the first positioning block or the third positioning block.

Preferably, the second positioning block is of a cuboid structure, and the length of the second positioning block is smaller than the width of the end head of the pouring block.

Preferably, the first positioning block, the second positioning block and the third positioning block are connected with the base in a positioning mode through positioning pins, and the first positioning block, the second positioning block and the third positioning block are fixedly connected with the base through countersunk screws.

Preferably, the simulation device further comprises a simulation piece, the appearance structure of the simulation piece is the same as that of the casting block with the blade, and the simulation piece can be placed between the adjacent first positioning block and the third positioning block instead of the casting block.

The invention has the following beneficial effects:

according to the positioning device, the first positioning blocks and the third positioning blocks are distributed alternately, the area for placing the casting blocks with the blades is reserved between the adjacent first positioning blocks and the adjacent third positioning blocks, and the adjacent first positioning blocks and the adjacent third positioning blocks are used for clamping a pair of side faces of the casting blocks. The end parts of the blades are clamped from the two side faces of the blades respectively by the aid of the top blocks on the first positioning block and the third positioning block, and the blade tenon on each pouring block is clamped and fixed by the aid of the structure, so that stability and machining accuracy of the tenon during turning are improved. The end opposite to the blade on each pouring block is provided with a second positioning block, the second positioning blocks are connected with the base and abut against the pouring blocks, the positions of the ends, opposite to the blade tenon, of the pouring blocks can be limited through the second positioning blocks, and the stability of the tenon in the turning process is improved. The second positioning block abuts against the pouring block; first locating piece or third locating piece are connected with the clamp plate, and the clamp plate is used for pushing down two adjacent casting blocks that are located first locating piece both sides or third locating piece both sides, and this kind of clamp plate structure that sets up can compress tightly the casting block on the base from the top of casting block, has improved the stability of tenon when car adds man-hour, and two casting blocks are pushed down simultaneously to a clamp plate for whole positioner's structure is compacter, has optimized positioner's structure.

Furthermore, the wedge blocks are arranged on the first positioning block and the third positioning block, so that the jacking force of the pressing surface of the pouring block can be adjusted, and each pouring block can be stably fixed.

Furthermore, the hole that supplies first screw to pass on the voussoir is waist type hole, and waist type hole can guarantee that the voussoir can also remove to the locating piece direction when pushing down, has guaranteed the effect that compresses tightly of voussoir, adopts the voussoir chute to install the voussoir, can make the position of voussoir accurate, has prevented in the processing tenon process that the voussoir shifts, becomes flexible.

Furthermore, the pin is installed to the bottom of voussoir, be equipped with elastic element in the pin chute, elastic element is used for providing the elastic force that makes the voussoir terminal surface not outstanding in the trend of first locating piece and third locating piece side for the voussoir, can make through pin and elastic element after the voussoir is become flexible, the voussoir is towards the terminal surface of pouring piece one end not outstanding in first locating piece and third locating piece side, prevent when settling the pouring piece, the voussoir blocks the pouring piece, still need the operation that people's manual work moved the pouring piece this moment, and the work efficiency is improved. Further, first kicking block and second kicking block all are the L type, and the kicking block of L type can enough realize pressing from both sides tight to blade tenon both sides, can also carry on spacingly to the terminal surface that sets up tenon one end on the pouring block, has further guaranteed the stability of pouring block. A taper hole is formed by the half taper hole in the first ejection block and the half taper hole in the second ejection block, a taper ring with the same taper is arranged in the taper hole, the taper ring is connected with the first positioning block and the third positioning block through bolts, the taper ring is fastened through the bolts, the taper ring moves downwards and drives the first ejection block and the second ejection block to rotate around respective rotating shafts, and therefore the blade tenon is clamped by the end portions of the first ejection block and the second ejection block.

Furthermore, the simulation piece is arranged to replace parts when the number of the parts to be processed is less than that of the whole disc.

Drawings

Fig. 1 is a schematic structural diagram of a turning positioning device and parts thereof.

FIG. 2 is a schematic view of a cross-section A-A of the turning positioning device.

FIG. 3 is a schematic view of a cross-sectional structure B-B of the turning positioning device.

FIG. 4 is a schematic view of a cross-sectional view of a turning positioning device C-C.

FIG. 5 is a schematic view of a cross-sectional view D-D of the turning positioning device.

Fig. 6 is a schematic structural view of the base 1 of the present invention.

Fig. 7 is a schematic view of the Q-Q structure of the base 1 of the present invention.

Fig. 8 is a schematic structural diagram of a first positioning block in the present invention.

Fig. 9 is a schematic diagram of an M-direction structure of the first positioning block according to the present invention.

Fig. 10 is a cross-sectional view E-E of the first positioning block of the present invention.

Fig. 11 is a sectional view F-F of a first spacer block according to the present invention.

FIG. 12 is a schematic view of a second positioning block of the present invention.

FIG. 13 is a sectional view taken along line G-G of the second positioning block of the present invention.

FIG. 14 is a schematic structural diagram of a third positioning block of the present invention.

Fig. 15 is a schematic structural view of the first top block in the present invention.

Fig. 16 is a schematic structural view of a first top block in a sectional view H-H according to the present invention.

Fig. 17 is a schematic structural view of a second top block in the present invention.

Fig. 18 is a schematic structural view of a sectional view from I to I of a second top block in the present invention.

FIG. 19 is a schematic view of the wedge of the present invention.

FIG. 20 is a schematic view of a wedge in the present invention in a sectional view from J to J.

FIG. 21 is a schematic view of the structure of the pressure plate of the present invention.

FIG. 22 is a schematic structural view of a platen according to the present invention in a cross-sectional view taken along line K-K.

FIG. 23 is a schematic view of the structure of the cone ring of the present invention.

In the figure, 1-base, 1-1-ring groove, 2-first positioning block, 2-1-first B surface, 2-2-first A surface, 2-3-first C surface, 2-4-first D surface, 3-second positioning block, 4-third positioning block, 4-1-second B surface, 4-2-second A surface, 5-first top block, 6-second top block, 7-wedge block, 7-1-pin hole, 8-pressing plate, 8-1-M surface, 9-cone ring, 10-simulation piece, 11-blade, 12-casting block, 12-1-casting block positioning surface, 12-2-casting block pressing surface, 13-pin, 14-spring, 15-pin chute, 16-kidney-shaped hole, 17-wedge chute, 18-first screw, 18-1 screw hole, 19-stud, 20-screw, 20-1-screw hole, 21-step screw, 21-1-step screw hole, 22-countersunk hole, 23-pin hole, 24-via hole and 25-semi-conical hole.

Detailed Description

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

Referring to fig. 1 and 4, the invention provides a positioning device for lathing tenon arc teeth of a plurality of rotor blades, which is used for solving the problems that the efficiency of the rotor blades is low and the positioning device is not easy to optimize when the tenon arc teeth are lathed. The positioning device comprises a base 1, a first positioning block 2, a second positioning block 3, a third positioning block 4 and a top block; the base 1 is of a circular ring-shaped structure, a plurality of first positioning blocks 2 and a plurality of third positioning blocks 4 are arranged, the first positioning blocks 2 and the third positioning blocks 4 are uniformly distributed and installed on the base 1, and the first positioning blocks 2 and the third positioning blocks 4 are distributed at intervals; an area for placing the casting block 12 with the blade is reserved between the adjacent first positioning block 2 and the adjacent third positioning block 4, the adjacent first positioning block 2 and the adjacent third positioning block 4 are used for clamping a pair of side faces of the casting block 12, one end of each of the first positioning block 2 and the third positioning block 4 is provided with a top block, and the top blocks on the first positioning block 2 and the third positioning block 4 are used for clamping the end part of the blade 11 from the two side faces of the blade 11 respectively; a second positioning block 3 is arranged on one end of each pouring block 12, opposite to the blade 11, on the base 1, and the second positioning blocks 3 are abutted against the pouring blocks 12; the first positioning block 2 or the third positioning block 4 is connected with a pressing plate 8, and the pressing plate 8 is used for pressing two adjacent casting blocks 12 positioned on two sides of the first positioning block 2 or two sides of the third positioning block 4.

Referring to fig. 1 and 3, as a preferred embodiment of the present invention, one side surface of the casting block 12 is a casting block positioning surface 12-1, and the other side surface of the casting block 12 is a casting block pressing surface 12-2; the side surfaces of one sides of the first positioning block 2 and the third positioning block 4 are both provided with positioning surfaces, the other sides of the first positioning block 2 and the third positioning block 4 are provided with wedge blocks 7 used for applying jacking force to the pouring block pressing surface 12-2, and the positioning surfaces of the first positioning block 2 and the third positioning block 4 are abutted against the pouring block positioning surface 12-1.

Referring to fig. 3, 8, 9, 10, 14, 19 and 20, a wedge chute 17 is formed in each of the first positioning block 2 and the third positioning block 4, the wedge 7 is disposed in the wedge chute 17, the wedge 7 is connected to the bottom of the wedge chute 17 by a first screw 18, the first screw 18 penetrates through the wedge 7, and a hole through which the first screw 18 penetrates in the wedge 7 is a kidney-shaped hole 16.

Referring to fig. 3, 8, 9, 10, 14, 19 and 20, as a preferred embodiment of the present invention, a pin 13 is mounted on the bottom of the wedge 7, a pin chute 15 for receiving the pin 13 is opened on the bottom surface of the wedge chute 17, and an elastic member for providing the wedge 7 with an elastic force such that the end surface of the wedge 7 does not protrude from the side surfaces of the first positioning block 2 and the third positioning block 4 is provided in the pin chute 15.

Referring to fig. 3, as a preferred embodiment of the present invention, a spring 14 is used as an elastic element, the spring 14 is arranged in a pin chute 15, and taking the orientation shown in fig. 3 as an example, the upper end of the spring 14 is connected with or abutted against a pin 13, the lower end of the spring 14 is fixedly connected with or abutted against the bottom of the pin chute 15, at this time, the spring 14 is in a compressed state, the spring 14 drives the wedge 7 to move towards the right through the self restoring force, and when the first screw 18 is loosened, the wedge 7 moves towards the right through the restoring force of the spring 14, so that the end surface of the wedge 7 does not protrude out of the side surfaces of the first positioning block 2 and the third positioning block 4, and the position between the pouring block 12 and the wedge 7 is prevented from interfering when the pouring block 12 is installed.

As a preferred embodiment of the present invention, referring to fig. 1, 5, 15 to 18 and 23, the top blocks on the first positioning block 2 and the third positioning block 4 respectively include a first top block 5 and a second top block 6 which are symmetrically arranged, the first top block 5 and the second top block 6 are both L-shaped, one end of the first top block 5 and one end of the second top block 6 are rotatably connected with the first positioning block 2 and the third positioning block 4, the other end of the first top block 5 and the other end of the second top block 6 respectively extend to two sides of the first positioning block 2 and two sides of the third positioning block 4, and the sections of the first top block 5 and the second top block 6 respectively abut against two sides of the vane 11; the adjacent edges of the first top block 5 and the second top block 6 are provided with half taper holes 25, the half taper holes on the first top block 5 and the half taper holes on the second top block 6 form a taper hole, a taper ring 9 with the same taper is arranged in the taper hole, and the taper ring 9 is connected with the first positioning block 2 and the third positioning block 4 through bolts.

Referring to fig. 1, 2, 4, 21 and 22, the pressing plate 8 is a flat plate structure, the pressing plate 8 is connected to the first positioning block 2 or the third positioning block 4 through a stud 19, and the bottom surfaces of both ends of the pressing plate 8 press the top surfaces of the casting blocks 12 on both sides of the first positioning block 2 or the third positioning block 4.

Referring to fig. 4, a stud 19 passes through the first positioning block 2 or the third positioning block 4 and is in threaded connection with the base 1, and the stud 19 is connected with a nut which is used for fixedly connecting the first positioning block 2 or the third positioning block 4 with the base 1; the hole of the pressing plate 8 for the stud 19 to pass through is a through hole, and the stud 19 is further connected with a nut which is used for pressing the pressing plate 8 downwards, so that the bottom surfaces of the two ends of the pressing plate 8 press the top surfaces of the pouring blocks 12 on the two sides of the first positioning block 2 or the third positioning block 4.

Referring to fig. 1, 12 and 13, the second positioning block 3 is a rectangular parallelepiped structure, and the length of the second positioning block 3 is smaller than the width of the end of the casting block 12.

Referring to fig. 1, 6, 7, 8 and 14, the first positioning block 2, the second positioning block 3 and the third positioning block 4 are all connected to the base 1 by positioning pins, and the first positioning block 2, the second positioning block 3 and the third positioning block 4 are all fixedly connected to the base 1 by countersunk screws.

Referring to fig. 1, a dummy block 10 is further included as a preferred embodiment of the present invention, the dummy block 10 has the same outer shape and size as those of the casting block 12, and the dummy block 10 can be placed between the adjacent first positioning block 2 and third positioning block 4 instead of the casting block 12.

Examples

The technical scheme of the embodiment is as follows: the positioning device designed by utilizing the lever principle is shown in fig. 1, 2, 3, 4 and 5, and mainly comprises a base 1, a first positioning block 2, a second positioning block 3, a third positioning block 4, a first top block 5, a second top block 6, a wedge block 7, a pressure plate 8, a conical ring 9, a simulation piece 10, a nut, a spring 14, a cylindrical pin 13 and a connecting screw.

The a base 1 is a stepped ring having a substantially uniform wall thickness. As shown in fig. 6 and 7.

All the positioning blocks are installed on the right end plane formed by the inner cylindrical surface D1a and the outer cylindrical surface D1b, and n uniformly distributed first positioning blocks 2, 2n second positioning blocks 3 and n third positioning blocks 4 are installed on the threaded holes M1a, M1c and the pin holes D1M on the end face. M1b mounts studs for platen 8. A second plane at the right end formed by the outer cylindrical surface D1b and the outer cylindrical surface D1c is provided with a plurality of uniformly distributed machine tool connecting holes D1n with pitch circles on D1D and four uniformly distributed axial lifting holes M1D. The pitch circle D1D is sized to require no interference with the outer cylindrical surface D1b when the eye screw is installed. In fig. 7, the left end surface of the base 1 is a plane connected with a machine tool, the left end surface is provided with a lightening groove, and the size of the groove C1 is between 20 and 30 mm. Aims to reduce the weight of the casting and improve the casting quality. In order to enhance the rigidity of the casting, uniformly distributed reinforcing ribs B1 are arranged in the lightening grooves. The positioning device is not easy to find the rotation center during machining, so that the middle part of the outer cylindrical surface D1c is provided with the annular groove 1-1 with the width of 15mm and the depth of 2mm, and the annular groove is concentric with the rotation center of the positioning device and is used as a righting circle of the positioning device before machining.

B the first locating block 2 is a special-shaped step block with an angled external shape, as shown in figures 8, 9, 10 and 11,

the first A surface 2-2 is attached to a casting block positioning surface 12-1 of the blade, the length of the first A surface 2-2 is larger than that of the casting block positioning surface 12-1, a gap of 1-2 mm is kept between the first B surface 2-1 and a casting block pressing surface 12-2 of an adjacent uniformly distributed part, and the first C surface 2-3 is attached to the right end face of the base 1 (the right end face of the base 1 shown in figure 7). And is aligned with the corresponding hole of the base 1 through four counter bores and two pin holes and is positioned and fastened with the base 1 through screws and pins. The angle B2a is determined by dividing 360 ° by the number of blades machined at one time. A groove with the width of A2 and the bottom angle of B2B (namely a wedge inclined groove 17) is formed in the middle position of the special-shaped step block, a wedge 7 is arranged in the groove to form clearance fit of H11/f11, the wedge 7 is slid and attached to the casting block pressing surface 12-2, the spring 14 arranged in the groove C2 (namely a pin inclined groove 15) is used for keeping the wedge 7 to be separated from the side surface of the casting block 12 when the spring 14 is in a free state, a first screw 18 penetrates through a kidney-shaped hole 16 of the wedge 7 and is arranged in a screw hole M2B (namely a screw hole 18-1 formed in the bottom surface of the wedge inclined groove 17 downwards) to lock the wedge 7.

Two M2a threaded holes (namely step screw holes 21-1) are machined in the first D surface 2-4, the first top block 5 and the second top block 6 are connected through the two step screws 21 arranged on the threaded holes M2a, and the first top block 5 and the second top block 6 can rotate around the step screws. As shown in fig. 8, 9 and 11, the middle upper part (the orientation shown in fig. 9) of two M2a is processed with a threaded hole at the bottom and a stepped hole at the upper part as shown in a cross section from F to F, and the threaded hole at the lower part of the stepped hole is inserted into the conical ring 9 by a stud 19, so that the outer conical surface of the conical ring 9 is simultaneously attached to the surfaces of the half-conical holes 25 on the first top block 5 and the second top block 6 (as shown in fig. 5). Through the downward movement of the conical ring 9, the first ejector block 5 and the second ejector block 6 are pushed to rotate around the two step screws respectively, and the parts are compressed tightly.

C. The positioning block 3 is a cuboid. As shown in fig. 12 and 13, the length is L3a, the width is L3b, and the height is L3 c. A counter bore and two pin holes are processed on the cuboid, and are positioned and fastened with the base 1. The size of L3a is 5-8mm smaller than the length locating surface of the casting block. The size of L3b is 8-10mm larger than the counterbore diameter and the height of L3c is no less than half the size of the end of the block 12 (the lower end of the block 12 in the orientation shown in fig. 1).

D. The positioning block 4 and the positioning block 2 have the same shape, and the difference is that a counter bore at the upper part is removed, and a through hole 22 with a relatively large size is processed. As shown in fig. 14, 9, 10 and 11

The second A surface 4-2 is attached to a casting block positioning surface 12-1 of the blade, the length of the second A surface 4-2 is larger than that of the positioning surface 12-1 of the casting block, a gap of 1-2 mm is kept between the second B surface 4-1 and an adjacent casting block pressing surface 12-2, and the C surface of the third positioning block 4 is attached to the right end face of the base 1 (the right end face of the base 1 shown in fig. 7). The angle B4a is determined by dividing 360 ° by the number of blades machined at one time. A groove with a bottom angle B2B and a width A4 (i.e., a wedge chute 17) is formed in the middle of the shaped step block, a wedge 7 is inserted into the groove to form a clearance fit of H11/f11, the wedge 7 is slid and attached to the compact surface 12-2 of the cast block, and a spring 14 mounted in the groove C4 (i.e., a pin chute 15) is used for keeping the wedge 7 in a released state when the spring 14 is in a free state. The first screw 18 is inserted into the M4b (i.e. the screw hole 18-1 opened downwards on the bottom surface of the wedge inclined groove 17) through the kidney-shaped hole 16 of the wedge 7 to lock the wedge 7. A through hole D4 (namely a through hole 22) is processed above the groove, a bolt used by the pressure plate 8 passes through the through hole and is locked on the base 1 by a nut, and the size of the through hole D4 is 3-5mm larger than that of the fastening nut.

Two M4a holes (namely step screw holes 21-1) are processed on the surface D of the three positioning blocks 4, and the three positioning blocks are connected with the first top block 5 and the second top block 6 through two step screws 12 arranged on the screw holes M4a, and the first top block 5 and the second top block 6 can rotate around the step screws. And step holes with threaded holes at the bottom and via holes at the upper parts are processed at the upper parts of the middles of the two M4a, and screws penetrate through the conical ring 9 and are installed in the threaded holes at the bottom of the step holes, so that the outer conical surface of the conical ring 9 is attached to the conical surfaces of the first top block 5 and the second top block 6. By means of downward movement of the conical ring 9, the first top block 5 and the second top block 6 are pushed to rotate around two step screws installed in the M4a holes respectively, and the parts are pressed tightly.

E. As shown in fig. 15 and 16, the first top block 5 is an L-shaped block, a half taper hole (i.e., a half taper hole 25) is machined at the right side of the middle, and the angle B5 of the half taper hole 25 is between 15 and 20 degrees and is consistent with the angle of the outer conical surface of the conical ring 9. Lower part processing hole D5, with step screw upper portion cylinder position H7/f7 clearance fit to through the double-screw bolt of step screw lower part, adorn respectively in the screw that corresponds in first locating piece 2 and the third locating piece 4, guarantee that first kicking block 5 rotates in a flexible way, when the power of the awl ring 9 because of the screw with half taper hole complex moves down, first kicking block 5 can be rotatory around the step screw, thereby compresses tightly the part.

F. As shown in fig. 17 and 18, the second top block 6 is an L-shaped block, and the thickness of the L-shaped block is in clearance fit with the length H11/f11 of the upper cylindrical part of the step screw. Half of the taper hole (namely, half of taper hole 25) is machined on the left side in the middle of the second top block 6, the angle B6 of (namely, half of taper hole 25) is 15-20 degrees, and the angle of the half of taper hole 25 is consistent with that of the outer taper surface of the taper ring 9. A hole D6 is processed at the lower part (as shown in the direction of figure 17) of the second ejector block 6, a hole D6 is in clearance fit with a cylindrical part H7/f7 at the upper part of a step screw, and the holes are respectively arranged in screw holes corresponding to the first positioning block 2 and the third positioning block 4 through studs at the lower part of the step screw, so that the second ejector block 6 is ensured to rotate flexibly. When the conical ring 9 matched with the conical hole moves downwards due to the force of the screw, the second top block 6 rotates around the step screw, so that the part is pressed.

G-wedge 7 is an angle block as shown in fig. 19 and 20. The wedge blocks are respectively arranged in wedge block chutes 17 in the middle parts of the first positioning block 2 and the third positioning block 4 to form H11/f11 clearance fit, the degree surface is attached to the degree surface of the groove bottom, and the wedge blocks are connected with the first positioning block 2 and the third positioning block 4 through screws passing through the step waist-shaped holes 16. The hole D7 (i.e. the pin hole 7-1) on the plane surface is provided with a cylindrical pin (i.e. the pin 13) for blocking the spring 14 arranged in the first positioning block 2 and the third positioning block 4.

F press plate 8 as shown in fig. 21 and 22, press plate 8 is a square block with a hole in the middle. The M-plane (in the orientation shown in fig. 22, i.e., the bottom surface of the platen) simultaneously presses the upper surfaces of two adjacent blocks (see fig. 1), and the length dimension L8a of platen 8 is 15-20mm greater than the center position of two adjacent blocks 12. The dimension L8b of the platen 8 is determined by requiring the pressing position to be as close as possible to the processing site. The thickness dimension L8c of the pressing plate 8 is determined by the magnitude of the pressing force. The middle part of the pressure plate 8 is provided with a hole D8 through which the stud 19 passes, which is 3-5mm larger than the compression nut (two nuts on the stud).

The F-cone ring 9 is shown in fig. 23 as a cone ring with a hole in the middle. The angle B9 is consistent with the angle B5 of the upper half-cone 25 of the first top block 5 and the angle B6 of the upper half-cone 25 of the second top block 6.

The shape of the G-shaped simulation part 10 is consistent with the state of the blade belt casting block, and the G-shaped simulation part is used for replacing parts when the number of the parts to be machined is less than that of the whole disc.

The using method of the invention is as follows: firstly, all the blades with the casting blocks are placed in a positioning station of a positioning device and completely attached to a positioning surface of a clamp, a wedge block 7 and a conical ring 9 are locked by screws, and at the moment, a pressing plate 8 is pressed against all the part casting blocks. And (5) completing the positioning and pressing of the part, and processing the blade tenon.

The invention has the advantages that: the positioning device can clamp a plurality of positioning blocks with blades at one time, can machine tenon arc teeth of a plurality of rotor blades simultaneously, and solves the problems that the efficiency of the rotor blades is low when the tenon arc teeth are machined, and the positioning device is not easy to optimize. The positioning device is designed by adopting the lever principle that positioning and pressing are mutually supported. The device has the advantages of reasonable and compact structure, convenient operation and reliable positioning, and meets the requirement of blade tenon arc tooth processing. The processing efficiency is improved, and the experience of reference is provided for similar problems.

Claims

1. A positioning device is characterized by comprising a base (1), a first positioning block (2), a second positioning block (3), a third positioning block (4) and a top block; the base (1) is of a circular ring-shaped structure, a plurality of first positioning blocks (2) and a plurality of third positioning blocks (4) are arranged, the first positioning blocks (2) and the third positioning blocks (4) are uniformly distributed on the base (1), and the first positioning blocks (2) and the third positioning blocks (4) are distributed at intervals; an area for placing a casting block (12) with a blade is reserved between the adjacent first positioning block (2) and the adjacent third positioning block (4), the adjacent first positioning block (2) and the adjacent third positioning block (4) are used for clamping a pair of side faces of the casting block (12), one end of each of the first positioning block (2) and the third positioning block (4) is provided with a top block, and the top blocks on the first positioning block (2) and the third positioning block (4) are used for clamping the end part of the blade (11) from the two side faces of the blade (11) respectively; a second positioning block (3) is arranged at one end of each pouring block (12) opposite to the blade (11), the second positioning block (3) is connected with the base (1), and the second positioning block (3) is abutted against the pouring block (12); the first positioning block (2) or the third positioning block (4) is connected with a pressing plate (8), and the pressing plate (8) is used for pressing two adjacent pouring blocks (12) positioned on two sides of the first positioning block (2) or two sides of the third positioning block (4);

one side surface of the casting block (12) is a casting block positioning surface (12-1), and the other side surface of the casting block (12) is a casting block pressing surface (12-2); the side surfaces of the first positioning block (2) and the third positioning block (4) adjacent to the casting block positioning surface (12-1) are respectively provided with a positioning surface, one side of the first positioning block (2) and one side of the third positioning block (4) adjacent to the casting block pressing surface (12-2) are provided with a wedge block (7) for applying a jacking force to the casting block pressing surface (12-2), and the positioning surfaces of the first positioning block (2) and the third positioning block (4) are abutted against the casting block positioning surface (12-1);

the top blocks on the first positioning block (2) and the third positioning block (4) respectively comprise a first top block (5) and a second top block (6); for a first positioning block (2) and a third positioning block (4) which are adjacent, a first ejector block (5) on the first positioning block (2) and a second ejector block (6) on the third positioning block (4) are symmetrically arranged relative to a blade (11), the first ejector block (5) and the second ejector block (6) are both L-shaped, and one ends of the first ejector block (5) and the second ejector block (6) are rotatably connected with the first positioning block (2) and the third positioning block (4); the other ends of the first ejector block (5) and the second ejector block (6) extend to the two sides of the first positioning block (2) and the two sides of the third positioning block (4) respectively, and the ends of the first ejector block (5) and the second ejector block (6) are respectively ejected to the two side faces of the blade (11); the adjacent limit of first kicking block (5) and second kicking block (6) all is equipped with half taper hole (25), and a taper hole is constituteed to half taper hole on first kicking block (5) and the half taper hole on second kicking block (6), be equipped with the taper ring (9) that the tapering is the same in the taper hole, taper ring (9) and first locating piece (2) and pass through bolted connection with third locating piece (4).

2. The positioning device according to claim 1, wherein the first positioning block (2) and the third positioning block (4) are respectively provided with a wedge chute (17), the wedge (7) is arranged in the wedge chute (17), the wedge (7) is connected with the bottom of the wedge chute (17) through a first screw (18), the first screw (18) penetrates through the wedge (7), and a hole through which the first screw (18) penetrates on the wedge (7) is a kidney-shaped hole (16).

3. A positioning device according to claim 2, characterized in that the bottom of the wedge (7) is provided with a pin (13), that the bottom surface of the wedge chute (17) is provided with a pin chute (15) for receiving the pin (13), and that the pin chute (15) is provided with a spring element for providing the wedge (7) with a spring force tending not to cause the end surface of the wedge (7) to protrude beyond the side surfaces of the first positioning block (2) and the third positioning block (4).

4. The positioning device according to claim 1, wherein the pressing plate (8) is a flat plate structure, the pressing plate (8) is connected with the first positioning block (2) or the third positioning block (4) through a stud (19), and the bottom surfaces of the two ends of the pressing plate (8) press the top surfaces of the casting blocks (12) on the two sides of the first positioning block (2) or the third positioning block (4).

5. A positioning device according to claim 4, characterized in that the stud (19) passes through the third positioning block (4) and is in threaded connection with the base (1), the stud (19) being connected with a nut for fixedly connecting the third positioning block (4) with the base (1); the hole of the pressing plate (8) for the stud (19) to pass through is a through hole, the stud (19) is further connected with a nut, and the nut is used for pressing the pressing plate (8) downwards, so that the bottom surfaces of the two ends of the pressing plate (8) press the top surfaces of the pouring blocks (12) on the two sides of the first positioning block (2) or the third positioning block (4).

6. A positioning device according to claim 1, characterized in that the second positioning block (3) is of a rectangular parallelepiped configuration, the length of the second positioning block (3) being smaller than the width of the end of the casting block (12).

7. The positioning device according to claim 1, wherein the first positioning block (2), the second positioning block (3) and the third positioning block (4) are connected with the base (1) through positioning pins in a positioning manner, and the first positioning block (2), the second positioning block (3) and the third positioning block (4) are fixedly connected with the base (1) through countersunk head screws.

8. A positioning device according to claim 1, characterized in that it further comprises a dummy member (10), the dummy member (10) having the same structure as the positioning block (12), the dummy member (10) being able to be placed between the adjacent first positioning block (2) and third positioning block (4) in place of the positioning block (12).