CN117620815A - Precise grinding process for five-generation single crystal turbine blade - Google Patents

Abstract

The invention belongs to the technical field of turbine blade processing, and particularly relates to a precision grinding process for a five-generation single crystal turbine blade, which comprises a processing box, wherein a discharging hole is formed in one side end face of the processing box, an opening seat is fixedly arranged at the bottom of the processing box on one side of the discharging hole, a fixed base is arranged at the bottom of the opening seat, a rotating plate is rotatably arranged at the top of the processing box, a multi-shaft mechanical arm is arranged on one side of the lower end face of the rotating plate, an electric pushing cylinder is arranged in the tail end of the multi-shaft mechanical arm, a telescopic push rod is arranged in the electric pushing cylinder in a sliding manner, one end of the telescopic push rod, close to the blade, extends out of the electric pushing cylinder and is connected with a connecting shaft, a first connecting plate is arranged at the other end of the connecting shaft in a connecting manner, a rotating shaft is rotatably arranged at the center of the bottom of the first connecting plate, and grinding wheels are arranged at the other end of the rotating shaft in a connecting manner. The polishing wheel designed by the invention can carry out different forms of polishing treatment on burrs on the surface of the turbine blade, including the surface of the air film hole, and can ensure that no grinding burn and crack occur in the polishing process.

Description

Precise grinding process for five-generation single crystal turbine blade

Technical Field

The invention belongs to the technical field of turbine blade machining, and particularly relates to a precision grinding process for a five-generation single crystal turbine blade.

Background

The turbine blade is a key component for forming the gas turbine, and compared with the traditional high-temperature alloy blade material, the single-crystal blade material has the characteristics of high fatigue strength, corrosion resistance, high temperature resistance and the like. But single crystal materials have poor machinability. The single crystal blade profile requires complicacy, and the precision is high, and the emery wheel is the only instrument of direct messenger work piece shaping, and consequently the selection of grinding the emery wheel is also important especially, and the grinding wheel that is common on the market at present is mostly rigid structure, exists a large amount of air film holes to turbine blade surface, and the air film hole can exist a large amount of burrs at casting in-process surface, and the existence of burr can seriously influence turbine result of use, and traditional equipment of polishing only can simply polish the plane, and on the air film hole always exists the concave-convex surface, consequently can't accomplish high accuracy polishing to produce the heat accumulation easily in the process of polishing, make blade surface produce grinding burn and crackle. Therefore, the design of the grinding wheel and the operation device which can finely grind the concave-convex surface of the turbine blade is of great significance.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a precision grinding process for a five-generation single crystal turbine blade. The polishing wheel designed by the invention can efficiently polish burrs of the air film holes at different positions on the surface of the turbine blade, and can ensure that no grinding burn and crack occur in the polishing process.

The aim of the invention can be achieved by the following technical scheme: the utility model provides a five take place ofs quick-witted single crystal turbine blade precision grinding technology, includes the processing case, the drain hole, be provided with the drain hole on the terminal surface of processing case one side, drain hole one side is provided with the fixed opening seat that exists a large amount of frostings of inside in processing incasement bottom, opening seat bottom is provided with fixed base, the blade base can be placed to the fixed base up end, blade base up end is provided with the blade, the blade top is provided with the rotor plate in processing case top rotation, terminal surface one side is provided with the multiaxis arm that has a plurality of degrees of freedom under the rotor plate, be provided with the electricity in the multiaxis arm end and push away the jar, the electricity pushes away the interior sliding of jar and is provided with flexible push rod, flexible push rod is close to blade one end and stretches out the electricity and push down the terminal surface, flexible push rod stretches out the terminal surface one end connection and is provided with the connecting axle under the jar, the connecting axle other end connection is provided with first connecting plate, first connecting plate bottom centre of a circle department rotates and is provided with the axis of rotation, the axis other end connection is provided with the emery wheel, the two ends face excircle faces are provided with the hard face of polishing and are provided with the face of polishing to the face between the flexible face of polishing of a plurality of polishing, the face is provided with the flexible face along the face that the inflation is polished to the face between the face of polishing. The hard grinding surface and the rotary grinding beads are made of Cubic Boron Nitride (CBN) grinding materials, and the grinding device has the advantages that the grinding temperature is extremely low, the heat generated during grinding is lower than the recrystallization temperature, the metallographic structure of the grinding device can be well maintained, and the influence of a material structure is reduced to the minimum.

Preferably, the center of the bottom of the blade base is communicated with a material injection channel for injection molding, a plurality of cooling air channels for cooling are arranged above the material injection channel in the blade base and in the blade, and a plurality of cooling air holes are arranged outside the cooling air channels on the outer end face of the blade base in a communicated mode.

Preferably, two sealing sliding rails are arranged on one side of the discharging hole on the upper side and the lower side of the outer end face of the treatment box, and sealing doors are symmetrically arranged between the two sealing sliding rails in a sliding mode.

Preferably, the opening seat both sides are provided with two in the processing box bottom symmetry and raise the base, two it all is fixed to raise the base up end and be provided with the grip slipper, it is provided with the centre gripping push pedal to slide in the grip slipper, centre gripping push pedal is close to opening seat terminal surface one end symmetry and is provided with two centre gripping push rods, the centre gripping push rod other end stretches into in the opening seat lateral wall, the centre gripping push rod stretches into in the opening seat lateral wall one end and connects and be provided with the centre gripping mainboard, be provided with a plurality of flexible cushion blocks on the terminal surface that the centre gripping mainboard is close to the opening seat, the centre gripping mainboard can carry out centre gripping fixed processing with blade base both sides. The flexible cushion block is arranged so that the blade base cannot be damaged when the blade base is clamped and fixed.

Preferably, the top rotates and is provided with the rotation base, the terminal surface connection is provided with the rotating plate under the rotation base, be provided with first ring gear on the outer disc of rotation base, first ring gear one side rotates in the processing box and is provided with first gear, do the meshing transmission between first gear and the first ring gear, first gear top is provided with first driving motor in processing box up end fixed, first driving motor output stretches into processing box and connects to set up in first gear up end. The first gear and the first toothed ring are arranged, so that the angle of the multi-axis mechanical arm can be adjusted.

Preferably, the polishing wheel is internally communicated with a ventilation circular bin, the upper end surface of the ventilation circular bin is communicated with a communication air passage at the center of a rotating shaft and a connecting shaft, the communication air passage is communicated with an air passage air inlet on one side wall above a first connecting plate, a second toothed ring is arranged below the air passage air inlet on the outer circular surface of the rotating shaft, a second gear is arranged on one side of the second toothed ring in a rotating manner below the first connecting plate, meshing transmission is carried out between the second gear and the second toothed ring, a second connecting plate is fixedly arranged on the outer circular surface of the connecting shaft above the air passage air inlet, a second driving motor is fixedly arranged at the bottom of the second connecting plate above the second gear, and the output end of the second driving motor extends out of the end surface of the first connecting plate and is connected with the center of the upper end of the second gear. The second driving motor is arranged, so that the grinding wheel can rotate and grind.

Preferably, the lower end face of the polishing wheel is provided with an annular and inflatable arc-shaped inflatable polishing surface which can be inflated outwards, a plurality of polishing grooves are uniformly formed in the outer end face of the arc-shaped inflatable polishing surface along the circumferential direction, a plurality of hard particles are arranged in each polishing groove, and the arc-shaped inflatable polishing surface is connected and communicated with the ventilating circular bin through a plurality of communication air ports. The setting of arc inflation face of polishing for when will polishing to the air film hole of blade concave surface department, can outwards bulge and parcel accomplish the face of polishing in the air film hole department of blade concave surface, can effectively avoid the production at dead angle, the setting of grinding groove can make things convenient for the iron fillings to discharge, thereby avoids the production of grinding burn. The abrasive particles also use Cubic Boron Nitride (CBN) abrasive materials.

Preferably, a plurality of material-passing inclined pipes used for gathering the frosting are uniformly communicated in the opening seat along the circumferential direction below the fixed base, each material-passing inclined pipe is internally provided with a filter screen for filtering impurities, a plurality of material-passing inclined pipe gathering points are positioned at the bottom of the fixed base and are provided with a material injector, the upper end surface of the material injector is communicated with the circle center of the fixed base and is provided with a material injector discharge port, the material injector discharge port can be communicated with a material injection channel at the bottom of the blade base, and the outer circular surface of the material injector is communicated with a material injector feed port in each material-passing inclined pipe. In the polishing process, the material injecting device can inject the frosted material into the material injecting channel at the bottom of the blade base, and then dirt in each cooling air channel in the blade can be cleaned.

Preferably, the center department is provided with the sand blaster that is used for the blowout dull polish in the circle storehouse of ventilating, sand blaster bottom terminal surface intercommunication is provided with the second sandblast horn mouth of horn mouth form, second sandblast horn mouth spun dull polish can enter into between each grinding groove, sand blaster up end intercommunication is provided with the second communicating tube, the second communicating tube other end stretches into in the connecting axle, the connecting axle outside is provided with the sand supply ring seat in the fixed intercommunication of second connecting plate up end, through a plurality of first communicating tube connection intercommunication between sand supply ring seat and the second communicating tube. The abrasive sprayed out of the sand blaster can serve as an abrasive during polishing on one hand, and on the other hand, the sprayed abrasive has fluidity, so that heat generated by polishing can be taken away in the flowing process, and the situation of local heat accumulation is avoided.

Compared with the prior art, the precision grinding process for the five-generation single crystal turbine blade has the following advantages:

1. according to the invention, through the design of the hard polishing surface, the flexible polishing surface, the arc expansion polishing surface, the polishing groove and other parts, the polishing head not only can finish polishing at the surface plane of the blade, but also can carry out cladding type precise polishing treatment on the burrs of the air film holes on the concave-convex surface of each part, and the polishing material is selected so that the polishing temperature is greatly reduced, and the generation of grinding burn and cracks is effectively avoided.

2. According to the invention, through the design of the parts such as the sand blaster, the second sand blasting horn mouth, the arc-shaped expansion grinding surface, the grinding groove and the like, new abrasive materials can be continuously replaced when the arc-shaped expansion grinding surface is ground, the flowing abrasive materials can also drive heat to be dispersed, the situation that the abrasive materials are adhered to the surface of the blade due to overhigh temperature can be effectively avoided, and the grinding effect is greatly improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a perspective view of a blade;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 6 is a cross-sectional view at B-B in FIG. 3;

FIG. 7 is a cross-sectional view taken at C-C of FIG. 5;

FIG. 8 is a partial enlarged view at D in FIG. 6;

FIG. 9 is an enlarged view of a portion of FIG. 6 at E;

FIG. 10 is an enlarged view of a portion of FIG. 7 at F;

in the figure: the treatment box 10, the discharge opening 23, the opening seat 22, the blade base 14, the blade 15, the rotating plate 18, the multi-axis mechanical arm 19, the electric push cylinder 20, the telescopic push rod 32, the connecting shaft 41, the first connecting plate 46, the rotating shaft 48, the grinding wheel 50, the hard grinding surface 51, the flexible grinding surface 53, the rotating grinding bead 54, the material injection channel 21, the cooling air channel 33, the cooling air hole 16, the sealing slide rail 12, the sealing door 13, the lifting base 34, the clamping seat 35, the clamping push plate 37, the clamping push rod 38, the clamping main plate 39, the flexible cushion block 40, the rotating base 17, the rotating plate 18, the first toothed ring 31, the first gear 30, the first driving motor 11, the ventilation circular bin 52, the communication air channel 61, the air channel air inlet 62, the second toothed ring 49, the second gear 47, the second connecting plate 63, the second driving motor 45, the arc-shaped expansion grinding surface 55, the grinding groove 56, the hard particles 57, the ventilation inclined tube 24, the filter screen 25, the injector 26, the injector discharge port 29, the injector feed port 28, the sand injector 58, the second sand-blasting horn 64, the first sand-blasting horn 59, the second communication pipeline 44, the sand-feeding ring seat 42 and the first communication pipeline 43.

Detailed Description

The invention aims to provide a precision grinding process for a five-generation single crystal turbine blade, and compared with the background art, the grinding wheel designed by the invention can carry out different forms of grinding treatment on different positions of the surface of the turbine blade, and can ensure that grinding burn and cracks cannot occur in the grinding process.

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

It should be noted that, the terms upper and lower are defined in fig. 1 to 10 by the positions of the components in the drawings and the positions of the components with respect to each other, and are only used for the sake of clarity and convenience in expressing the technical solutions. It should be understood that the use of directional terms herein should not be construed to limit the scope of the application as claimed.

Embodiment one:

as shown in fig. 1, fig. 5, fig. 6 and fig. 8, a precision grinding process for a single crystal turbine blade of a five-generation machine comprises a processing box 10, a discharge opening 23 is arranged on one side end face of the processing box 10, an opening seat 22 with a large amount of frosted inside is fixedly arranged at one side of the discharge opening 23 in the processing box 10, a fixed base 27 is arranged at the bottom of the opening seat 22, a blade base 14 can be placed on the upper end face of the fixed base 27, a blade 15 is arranged on the upper end face of the blade base 14, a rotating plate 18 is rotatably arranged above the blade 15 at the top of the processing box 10, a multi-shaft mechanical arm 19 with a plurality of degrees of freedom is arranged at one side of the lower end face of the rotating plate 18, an electric push cylinder 20 is arranged in the end face of the multi-shaft mechanical arm 19, a telescopic push rod 32 is arranged in the inner side of the electric push cylinder 20, one end, which is close to the blade 15, extends out of the lower end face of the electric push cylinder 20, one end of the telescopic push rod 32 is connected with a connecting shaft 41, the other end of the connecting shaft 41 is connected with a first connecting plate 46, a rotating shaft 48 is rotatably arranged at the center of the bottom of the first connecting plate 46, the rotating shaft 48, the other end of the rotating shaft 48 is connected with a plurality of grinding balls 50 are arranged on the other end faces 50, a plurality of grinding balls 53 are uniformly arranged along the outer circumferential direction of grinding faces of the grinding balls 51, and the grinding faces are uniformly arranged on the outer circumferential faces of the grinding balls 51, and the grinding faces are uniformly arranged on the two grinding balls and the outer faces of the grinding balls 51, and the grinding faces are uniformly arranged on the grinding balls and the grinding faces between the grinding faces, and the grinding balls 51, and the grinding faces are 53 are made up.

Further, as shown in fig. 4 and 5, an injection channel 21 for injection molding is provided in the bottom center of the blade base 14, a plurality of cooling air channels 33 for cooling are provided above the injection channel 21 in the blade base 14 and in the blade 15, and a plurality of cooling air holes 16 are provided in the outer side of the cooling air channels 33 in the outer end face of the blade base 14.

Further, as shown in fig. 4, two sealing sliding rails 12 are disposed on the upper and lower sides of the outer end surface of the treatment box 10 at one side of the discharge port 23, and sealing doors 13 are symmetrically and slidably disposed between the two sealing sliding rails 12.

Further, as shown in fig. 6, two lifting bases 34 are symmetrically arranged at two sides of the opening seat 22 in the inner bottom of the processing box 10, clamping seats 35 are fixedly arranged on the upper end faces of the two lifting bases 34, two clamping push plates 37 are slidably arranged in the clamping seats 35, two clamping push rods 38 are symmetrically arranged at one end, close to the end face of the opening seat 22, of the clamping push plates 37, the other end of each clamping push rod 38 extends into the side wall of the opening seat 22, one end, extending into the side wall of the opening seat 22, of each clamping push rod 38 is connected with a clamping main plate 39, a plurality of flexible cushion blocks 40 are arranged on the end face, close to the opening seat 22, of each clamping main plate 39 can clamp and fix two sides of the blade base 14.

Further, as shown in fig. 6, a rotating base 17 is rotatably disposed at the top in the processing box 10, a rotating plate 18 is connected to the lower end surface of the rotating base 17, a first toothed ring 31 is disposed on the outer circumferential surface of the rotating base 17, a first gear 30 is disposed on one side of the first toothed ring 31 in the processing box 10 in a rotating manner, meshing transmission is performed between the first gear 30 and the first toothed ring 31, a first driving motor 11 is fixedly disposed on the upper end surface of the processing box 10 above the first gear 30, and an output end of the first driving motor 11 extends into the processing box 10 and is connected to the upper end surface of the first gear 30.

Further, as shown in fig. 8 and 10, a ventilation circular bin 52 is disposed in the grinding wheel 50 in a communicating manner, a communication air passage 61 is disposed on the upper end surface of the ventilation circular bin 52 in a communicating manner at the center of the rotation shaft 48 and the center of the connection shaft 41, an air passage air inlet 62 is disposed on a side wall above the first connection plate 46 in a communicating manner, a second toothed ring 49 is disposed on the outer circumferential surface of the rotation shaft 48 below the air passage air inlet 62, a second gear 47 is disposed on one side of the second toothed ring 49 in a rotating manner below the first connection plate 46, a second connection plate 63 is fixedly disposed on the outer circumferential surface of the connection shaft 41 above the air passage air inlet 62, a second driving motor 45 is fixedly disposed on the bottom of the second connection plate 63 above the second gear 47, and an output end of the second driving motor 45 extends out of the end surface of the first connection plate 46 and is connected to the center of the upper end of the second gear 47.

Further, as shown in fig. 8 and 10, the lower end surface of the grinding wheel 50 is provided with an annular inflatable arc-shaped inflatable grinding surface 55 which is inflatable outwards, a plurality of grinding grooves 56 are uniformly formed in the outer end surface of the inflatable arc-shaped inflatable grinding surface 55 along the circumferential direction, a plurality of hard particles 57 are arranged in each grinding groove 56, and the inflatable arc-shaped inflatable grinding surface 55 is connected and communicated with the ventilating circular bin 52 through a plurality of communication air ports 60.

The operator pulls the sealing door 13 open to both sides to open the drain hole 23 after, the operator puts blade base 14 and blade 15 etc. into the up end of opening seat 22, then grip block 35 starts, grip block 35 promotes inside centre gripping push pedal 37 outwards to promote two centre gripping push rods 38 that set up in centre gripping push pedal 37 one end outwards, thereby promote the centre gripping mainboard 39 that sets up in centre gripping push rod 38 one end and remove in opening seat 22, thereby make the flexible cushion 40 of centre gripping mainboard 39 outer end face can be in contact with blade base 14 both ends face, thereby can carry out centre gripping fixation processing with blade base 14 and blade 15 etc. after blade 15 accomplishes the centre gripping, the operator alright close sealing door 13.

At this time, the multi-axis mechanical arm 19 is started, the multi-axis mechanical arm 19 bends each arm according to a program, so that the position of the grinding wheel 50 at the tail end can be adjusted, the outer circular surface of the grinding wheel 50 can be contacted with the outer end surface of the blade base 14, if the air film hole and the large protrusions on the surface of the blade are required to be ground in the contact process, the second driving motor 45 is started, the output end of the second driving motor 45 drives the second gear 47 to rotate, the second toothed ring 49 meshed with the second gear is driven to rotate, the rotating shaft 48 arranged at the center of the second toothed ring 49 is driven to rotate, the grinding wheel 50 arranged at one end of the rotating shaft 48 is driven to rotate, and the hard grinding surface 51 arranged on the outer circular surface of the grinding wheel 50 is driven to grind the large protrusions.

If the device needs to finely polish the flange on the surface of the blade base 14 or the air film hole in the concave part, at this time, the device can pour the gas into the air passage through the air passage air inlet 62, so that the gas is poured into the air passage 61, then the gas is poured into the air passage circular bin 52 through the air passage 61, after the gas filled into the air passage circular bin 52 reaches a certain amount, the flexible polishing surface 53, the rotary polishing beads 54 and the like bulge outwards, after the outer end surface of the flexible polishing surface 53 exceeds the diameter of the hard polishing surface 51, the device can finely polish the air film hole on the outer circular surface of the blade base 14 through the flexible polishing surface 53 and the rotary polishing beads 54, and in the polishing process, the flexible polishing surface 53 can be always wrapped outside the blade base 14 for polishing, so that the flange or the concave part on the outer side of the blade base 14 can be effectively polished deeply.

When the depth of the concave part is large, the communicating air port 60 is opened at this time, so that the air filled into the ventilation circular bin 52 can enter the arc-shaped expansion grinding surface 55, and the arc-shaped expansion grinding surface 55 can be blown outwards to bulge, so that the grinding groove 56, hard particles 57 and the like on the outer circular surface of the arc-shaped expansion grinding surface 55 can be expanded to the outer side of the hard grinding surface 51, and at this time, if the grinding wheel 50 grinds the joint of the blade base 14 and the blade 15, the outer side of the air film hole at the concave part can be wrapped for grinding, and in the grinding process, the outer circular surface of the hard grinding surface 51 cannot interfere with the blade base 14 or the blade 15 because the arc-shaped expansion grinding surface 55 bulges outwards.

In the polishing process, the electric push cylinder 20 can push the inner telescopic push rod 32 to perform telescopic movement of length, so that the distance between the polishing wheel 50 and the blade base 14 can be adjusted, when the blade base 14 is polished somewhere, the first driving motor 11 can be started at this time, the output end of the first driving motor 11 drives the first gear 30 to rotate, so as to drive the first toothed ring 31 meshed with the first gear 30 to rotate, and further drive the rotating base 17 arranged at the center of the first toothed ring 31 and the rotating plate 18 arranged at the bottom of the rotating base 17 to rotate, so as to drive the multi-axis mechanical arm 19 arranged at one side of the bottom of the rotating plate 18 to perform azimuth adjustment.

Embodiment two:

on the basis of the first embodiment, as shown in fig. 5 and 9, a plurality of material passing inclined pipes 24 for gathering the frosted material are uniformly communicated in the opening seat 22 along the circumferential direction below the fixed base 27, a filter screen 25 for filtering impurities is arranged in each material passing inclined pipe 24, a material injector 26 is arranged at the bottom of the fixed base 27 at the gathering point of the material passing inclined pipes 24, a material injector discharge port 29 is communicated with the center of the fixed base 27 on the upper end surface of the material injector 26, the material injector discharge port 29 can be communicated with a material injection channel 21 at the bottom of the blade base 14, and a material injector feed port 28 is communicated with the outer circular surface of the material injector 26 in each material passing inclined pipe 24.

In the process of polishing by the polishing wheel 50, the feeder 26 arranged at the bottom of the fixed base 27 is started, the feeder 26 sucks the sand which slides into one side through the feeding inclined tube 24 into the feeder 26 through the feeder feeding inlet 28, then the sand is poured into the feeding channel 21 at the bottom of the blade base 14 through the feeder discharging outlet 29 at the top, the sand flows poured into the feeding channel 21 respectively enter the respective pipelines in the feeding channel 21, then the sand flows are discharged outwards through the cooling air holes 16 at one end of the feeder 26, dirt, burrs and the like at the positions of the channels in the feeding outlet 29 can be removed by the sand flows in the flowing process, the sand discharged through the cooling air holes 16 can drop downwards to continue to flow to the feeding inclined tube 24, and after the dirt is filtered through the filter screen 25 at the feeding inclined tube 24, the burrs and the dirt enter the feeder 26 again, so that circular polishing is performed.

Embodiment III:

on the basis of the first or second embodiment, as shown in fig. 8, a sand ejector 58 for ejecting sand is arranged at the center of the circle in the ventilation circular bin 52, a bell mouth-shaped second sand-ejecting bell mouth 64 is arranged on the end surface of the bottom of the sand ejector 58 in a communicating manner, the sand ejected by the second sand-ejecting bell mouth 64 can enter between the grinding grooves 56, a second communication pipeline 44 is arranged on the upper end surface of the sand ejector 58 in a communicating manner, the other end of the second communication pipeline 44 extends into the connecting shaft 41, a sand-supplying ring seat 42 is fixedly arranged on the upper end surface of the connecting shaft 41 outside the second connecting plate 63, and the sand-supplying ring seat 42 and the second communication pipeline 44 are connected and communicated through a plurality of first communication pipelines 43.

When the polishing angle is in a position of being more in the right-hand position, the sand supply ring seat 42 is started, the sand supply ring seat 42 is used for filling sand into the first communication pipeline 43, then sand can enter the second communication pipeline 44 through the first communication pipeline 43, then sand is filled into the sand blaster 58 through the second communication pipeline 44, at the moment, the sand blaster 58 can spray a part of sand on the surface of the blade base 14 through the second sand blasting horn mouth 64 so as to carry out auxiliary shot blasting polishing, and the other part of sand can be clamped by hard particles 57 in the grinding grooves 56 on the surface of the outwards-bulged arc-shaped expansion grinding surface 55, so that the grinding particles are more, the grinding fineness is improved, if the sand is worn in the relation, the sand can fall down, then new sand can enter, and the equipment can be guaranteed to carry out polishing for a long time.

The foregoing is merely a preferred embodiment of the present application, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art may make many possible variations and modifications to the technical solution of the present application, or modify equivalent embodiments, using the methods and technical contents disclosed above, without departing from the scope of the technical solution of the present application. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present application, which do not depart from the content of the technical solution of the present application, still fall within the scope of the technical solution of the present application.

Claims (10)

1. The utility model provides a five generations machine single crystal turbine blade precision grinding equipment, includes processing case (10), drain hole (23), its characterized in that, be provided with drain hole (23) on processing case (10) one side terminal surface, drain hole (23) one side is provided with opening seat (22) that inside has a large amount of frostings in processing case (10) fixed, opening seat (22) bottom is provided with fixed base (27), blade base (14) can be placed to fixed base (27) up end, blade base (14) up end is provided with blade (15), blade (15) top is provided with rotating plate (18) in processing case (10) top rotation, rotating plate (18) lower terminal surface one side is provided with multiaxis manipulator (19) that have a plurality of degrees of freedom down, be provided with electric push cylinder (20) in the multiaxis manipulator (19) terminal end, the interior telescopic push rod (32) that is provided with of electric push cylinder (20), telescopic push rod (32) are close to blade (15) one end and stretch out electric push cylinder (20) under terminal surface, telescopic push rod (32) stretch out electric push rod (46) under terminal surface, one end (46) are provided with connecting plate (46) and are connected with one end (46), rotating plate (46) are connected with one end (46), the rotary shaft (48) other end connection is provided with grinding wheel (50), all be provided with on the outer disc of the upper and lower both ends face of grinding wheel (50) and polish face (51) by a plurality of grinding teeth constitution, two be provided with flexible grinding face (53) that aerify alright outwards inflation on the outer disc of grinding wheel (50) between the stereoplasm face (51), evenly be provided with a plurality of rotation grinding beads (54) along the circumferencial direction on the outer disc of flexible grinding face (53).

2. The precision grinding equipment for the five-generation single crystal turbine blade according to claim 1, wherein an injection passage (21) for injection molding is arranged in the center of the bottom of the blade base (14), a plurality of cooling air passages (33) for cooling are arranged above the injection passage (21) in the blade base (14) and in the blade (15), and a plurality of cooling air holes (16) are arranged outside the cooling air passages (33) in the outer end face of the blade base (14) in a communicating manner.

3. The precision grinding equipment for the five-generation single crystal turbine blade according to claim 1 is characterized in that two sealing slide rails (12) are arranged on one side of the discharging hole (23) on the upper side and the lower side of the outer end face of the processing box (10), and sealing doors (13) are symmetrically arranged between the two sealing slide rails (12) in a sliding mode.

4. The precision grinding equipment for the five-generation single crystal turbine blade according to claim 1, wherein two lifting bases (34) are symmetrically arranged at the inner bottom of the processing box (10) at two sides of the opening seat (22), clamping seats (35) are fixedly arranged on the upper end faces of the two lifting bases (34), clamping push plates (37) are slidably arranged in the clamping seats (35), two clamping push rods (38) are symmetrically arranged at one end, close to the end face of the opening seat (22), of each clamping push plate (37), the other end of each clamping push rod (38) stretches into the side wall of the opening seat (22), a clamping main plate (39) is connected with one end, close to the side wall of the opening seat (22), of each clamping main plate (39), and a plurality of flexible cushion blocks (40) are arranged on the end face, close to the opening seat (22), of each clamping main plate (39) can clamp and fix two sides of the blade base (14).

5. The precision grinding equipment for the five-generation single crystal turbine blade according to claim 1, wherein a rotating base (17) is rotatably arranged at the inner top of the processing box (10), a rotating plate (18) is connected and arranged on the lower end face of the rotating base (17), a first toothed ring (31) is arranged on the outer circular face of the rotating base (17), a first gear (30) is rotatably arranged on one side of the first toothed ring (31) in the processing box (10), meshing transmission is carried out between the first gear (30) and the first toothed ring (31), a first driving motor (11) is fixedly arranged on the upper end face of the processing box (10) above the first gear (30), and the output end of the first driving motor (11) extends into the processing box (10) and is connected with the upper end face of the first gear (30).

6. The precision grinding equipment for the single crystal turbine blade of the fifth generation machine according to claim 1, wherein a ventilation circular bin (52) is internally connected to the grinding wheel (50), a communication air passage (61) is arranged on the upper end face of the ventilation circular bin (52) in a communicating manner at the circle center of the rotating shaft (48) and the connecting shaft (41), an air passage air inlet (62) is arranged on one side wall above the first connecting plate (46) in a communicating manner, a second toothed ring (49) is arranged on the outer circle face of the rotating shaft (48) below the air passage air inlet (62), a second gear (47) is arranged on one side of the second toothed ring (49) in a rotating manner below the first connecting plate (46), meshing transmission is carried out between the second gear (47) and the second toothed ring (49), a second connecting plate (63) is fixedly arranged on the outer circle face of the connecting shaft (41) above the air passage air inlet (62), a second driving motor (45) is fixedly arranged on the bottom of the second connecting plate (63) above the second gear (47), and the second driving motor (45) is arranged at the position of the output end face of the second connecting plate (46) extending out of the first end face (46).

7. The precision grinding equipment for the single-crystal turbine blade of the fifth generation machine according to claim 1 is characterized in that an annular inflatable arc-shaped inflatable grinding surface (55) which can be inflated outwards is arranged on the lower end face of the grinding wheel (50), a plurality of grinding grooves (56) are uniformly formed in the outer end face of the inflatable arc-shaped inflatable grinding surface (55) along the circumferential direction, a plurality of hard particles (57) are arranged in each grinding groove (56), and the inflatable arc-shaped inflatable grinding surface (55) and the ventilating circular bin (52) are connected and communicated through a plurality of communication air ports (60).

8. The precision grinding equipment for the five-generation single crystal turbine blade according to claim 1, wherein a plurality of material passing inclined pipes (24) for converging frosted sand are uniformly communicated in the circumferential direction in an opening seat (22) below the fixed base (27), a filter screen (25) for filtering impurities is arranged in each material passing inclined pipe (24), a plurality of material passing inclined pipes (24) converging points are arranged at the bottom of the fixed base (27), a material injector (26) is arranged at the bottom of the fixed base (27), a material injector discharge port (29) is communicated with the center of a circle of the fixed base (27) on the upper end surface of the material injector (26), the material injector discharge port (29) can be communicated with a material injection channel (21) at the bottom of the blade base (14), and a material injector feed port (28) is formed in each material passing inclined pipe (24) in an outer circular surface of the material injector (26).

9. The precision grinding equipment for the five-generation single crystal turbine blade according to claim 6, wherein a sand ejector (58) for ejecting sand is arranged at the inner center of the ventilation circular bin (52), a horn-shaped second sand-ejecting horn mouth (64) is arranged on the end face of the bottom of the sand ejector (58) in a communicated mode, the sand ejected by the second sand-ejecting horn mouth (64) can enter between grinding grooves (56), a second communication pipeline (44) is arranged on the upper end face of the sand ejector (58) in a communicated mode, the other end of the second communication pipeline (44) extends into a connecting shaft (41), a sand-supplying ring seat (42) is fixedly arranged on the outer side of the connecting shaft (41) on the upper end face of a second connecting plate (63), and the sand-supplying ring seat (42) is connected with the second communication pipeline (44) in a communicating mode through a plurality of first communication pipelines (43).

10. The precision grinding process for a five-generation single crystal turbine blade according to any one of claims 1 to 9, wherein the process flow is as follows:

s1, an operator places a blade on an opening seat, when the blade is placed, an injection molding channel at the bottom of a blade base is required to be aligned with a discharge hole of an injector, and after the placement is finished, a sealing surface can be closed and equipment is started;

s2, clamping main boards arranged on two sides in the opening seat are used for clamping the blades and the blade base, and then the rotating board rotates to drive the multi-axis mechanical arm to adjust the angle;

s3, the multi-axis mechanical arm drives the grinding wheel to move to the surface of the blade, and then the second driving motor drives the grinding wheel to grind burrs of the air film hole, and in the grinding process, if the stroke of the multi-axis mechanical arm is insufficient, the electric pushing cylinder can perform supplementary stroke treatment;

s4, when the polishing is performed if part of the burrs of the concave-convex surface air film hole cannot be polished, at the moment, the flexible polishing surface and the arc-shaped expansion polishing surface are outwards bulged through gas filling, precision polishing treatment is performed through the arrangement of wrapping the concave-convex surface, and the outwards bulged flexible polishing surface and the arc-shaped expansion polishing surface can also extend into the surfaces and the inner walls of the air film hole, so that burrs on the surfaces of holes of the flexible polishing surface and the arc-shaped expansion polishing surface are cleaned;

s5, in the polishing process, the sand blaster continuously sprays out the sand to enter between the arc expansion polishing surfaces, and the heat dissipation treatment is completed through the flowing sand;

s6, in the process of polishing the outer surface of the blade, the material injector can pour the frosted material into each cooling air passage in the blade through a material outlet of the material injector, and cleaning and polishing of each cooling air passage in the blade are completed through frosted flow;

and S7, after polishing, the clamping main board is released to clamp, and an operator opens the sealing door to take away the sealing door.