CN219255238U - Clamp for machining tenon teeth of low-pressure turbine working blade - Google Patents
Clamp for machining tenon teeth of low-pressure turbine working blade Download PDFInfo
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- CN219255238U CN219255238U CN202320404553.8U CN202320404553U CN219255238U CN 219255238 U CN219255238 U CN 219255238U CN 202320404553 U CN202320404553 U CN 202320404553U CN 219255238 U CN219255238 U CN 219255238U
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Abstract
The utility model relates to a clamp for machining the tenon teeth of a working blade of a low-pressure turbine, a supporting block is connected with a base, a side positioning seat provided with a side positioning block is fixed on a bottom plate, a tail positioning seat provided with a tail positioning block is fixed on the base, a blade body positioning seat provided with a blade body positioning block and a shaft positioning pin is fixed on the bottom plate, a gland is fixed at the upper end of the base and can rotate, a front pressure head and a rear pressure head are fixed on a pressure rod through screws, the pressure rod is fixed on a pressure cover, the distance between the front pressure head and the rear pressure head and parts is automatically adjusted through a compression spring, the side pressure head and the tail pressure head are respectively fixed on the front pressure rod and the rear pressure rod through screws, the pressure rod body is fixed on the side surface of the bottom plate, the distance between the side pressure head and the tail pressure head is adjusted through knurled cylinder head set screws, and a guide plate is fixed on the front side of the bottom plate. The clamping device can simultaneously compress during the clamping process, and ensures the consistency of the clamping process.
Description
Technical Field
The utility model relates to the field of blade machining clamps, in particular to a clamp for machining a tenon tooth of a working blade of a low-pressure turbine.
Background
At present, the existing low-pressure turbine working vane is processed by adopting a creep feed grinding machine to grind and process a basin and a back tenon tooth, wherein a clamp positioning point is two positioning points in a back tenon tooth extension section, the side surface of an exhaust side tenon tooth is a positioning point of a back blade body, the side surface of an exhaust side of a blade crown is a positioning point of the back blade body, the compression adopts a basin to a tenon tooth extension section, the basin corresponding to the back blade body positioning point is a side surface of an inlet side of the tenon tooth, and the side surface of the inlet side of the blade crown is a side surface of the inlet side of the blade crown. In the actual machining process, the contact area of positioning points is small, and the machining size is unstable due to inconsistent pressing force.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a clamp for processing the tenon tooth of the working blade of the low-pressure turbine, which comprises the following specific scheme:
a clamp for machining the tenon teeth of a low-pressure turbine working blade comprises a base, a supporting block, a gland, a pressing rod, a front pressing head, a rear pressing head, a side positioning seat, a blade body positioning seat, a tail positioning seat, a process ball pin, a pressing rod body, a front pressing rod, a rear pressing rod, a side pressing head, a tail block, a pressing head, a guide plate, a blade body positioning block, a side positioning block, a knurled cylinder head set screw and a movable joint bolt;
two mounting plates a and b perpendicular to the bottom plate are arranged in the middle of the base, ear seats are arranged on two sides of the mounting plates a and b, and U-shaped openings for connecting the workbench are formed in the ear seats; a craft ball pin is arranged on the right ear seat;
the front ends of the mounting plate a and the mounting plate b are provided with bar-shaped notches, and the upper ends of the mounting plate a and the mounting plate b are respectively provided with a bayonet a and a bayonet b which are consistent with the shape of the gland;
the side walls of the mounting plate a and the mounting plate b are respectively provided with a plurality of mounting screw holes;
the bayonet a is provided with a pin hole for installing a movable joint bolt downwards;
screw holes for installing the gland are formed in the front end and the rear end of the bayonet b;
the rear compression bar and the front compression bar are respectively provided with a mounting end and a connecting end;
the front end and the rear end of the compression bar body are respectively provided with a U-shaped groove, and the middle of the compression bar body is provided with a connecting screw hole;
the rear compression bar connecting end is arranged in a U-shaped groove at the rear end of the compression bar body and is connected with the compression bar body through screw connection; the front pressure bar connecting end is arranged in a U-shaped groove at the front end of the pressure bar body and is connected with the pressure bar body through screw connection;
the tail pressure head is arranged at the mounting end of the rear pressure rod, and the side pressure head is arranged at the mounting end of the front pressure rod;
one end of the tail block is a mounting edge, and the other end of the tail block is a connecting seat and is connected to the tail end of the bottom plate through a cylindrical pin and a screw; the connecting seat is provided with a screw hole for connecting the compression screw;
the supporting block is connected to the front end of the bottom plate through a cylindrical pin and a screw, and a tenon positioning block along with the supporting block is arranged on the end face of the supporting block;
the side positioning block is fixed on the side wall of the side positioning seat, and the side positioning seat is fixed on the bottom plate between the supporting block and the mounting plate b through a screw;
the blade body positioning seat and the tail positioning seat are both arranged at the rear end of the bottom plate;
the side wall of the tail positioning seat is provided with a tail positioning block;
the upper end of the blade body positioning seat is an inclined positioning surface, the positioning surface is provided with a notch, and a blade body positioning block is arranged in the notch;
the front end of the positioning surface is a plane, the rear end of the positioning surface is a trapezoid surface, the end face of the rear end is provided with a connecting hole, and the shaft positioning pin is arranged in the connecting hole;
the pressure bar is L-shaped and is provided with a connector, the rear end and the front end of the pressure bar are both provided with mounting clamping seats, the front pressure head is arranged on the mounting clamping seats at the front end of the pressure bar through screws, and the rear pressure head is arranged on the mounting clamping seats at the rear end of the pressure bar through screws;
the compression rod body is provided with a round hole for placing a compression spring; the distance between the front pressure head and the rear pressure head and the compression part of the blade is automatically adjusted through the compression spring;
a pin hole is formed in one side of the gland, a U-shaped notch is formed in the other side of the gland, a lightening hole and a square mounting opening are formed in the middle cover body, a strip-shaped channel consistent with the rod body of the compression rod is formed in the bottom surface of the gland, and a round hole for placing the compression spring is formed in the channel;
the connector of the rod body is arranged in the square mounting opening, the compression spring is arranged in a cavity formed by the rod body and the round hole of the gland, and the rod body and the gland are locked and fixed through a screw;
the gland is arranged on the bayonet b of the mounting plate b and is connected with the compression bar through a screw hole on the bayonet b by a bolt;
the U-shaped notch of the gland is lapped on the bayonet a of the mounting plate a;
the movable joint bolt is connected to the mounting opening on the bayonet a, and lifted to the U-shaped notch to lock the gland;
the compression screw is arranged on the connecting seat of the tail block, and the front end head of the compression screw is provided with a compression head;
the screw holes of the side wall of the mounting plate a are internally provided with inclined annular knurl cylinder head set screws, the inclined annular knurl cylinder head set screws penetrate through the side wall of the mounting plate a, the ends of the inclined annular knurl cylinder head set screws are propped against the front compression bar and the rear compression bar, and the compression of the front compression bar and the rear compression bar on the blades is adjusted through the elastic screws.
The fixture for machining the tenon teeth of the low-pressure turbine working blade is characterized in that the blade body positioning blocks, the tail positioning blocks and the side positioning blocks are made of wear-resistant alloy.
The clamp for machining the tenon teeth of the low-pressure turbine working blade is characterized in that the pressing head is a cylindrical rubber head.
The clamp for machining the tenon tooth of the low-pressure turbine working blade is characterized in that the side pressure head, the tail pressure head, the front pressure head and the rear pressure head are all made of brass.
The lower end of the blade basin towards the blade crown is clamped on the shaft locating pin, the basin direction of the blade body of the blade is contacted with the blade body locating block, the tenon groove of the tenon is clamped on the tenon locating block, one side of the exhaust edge of the blade body is propped against the side locating block and the tail locating block, the front pressure bar and the rear pressure bar are adjusted through the knurled cylinder head set screw, the side pressure head and the tail pressure head are propped against the air inlet edge of the blade body, the front pressure head and the rear pressure head on the pressure bar compress the back of the blade body, and the pressure cover is locked on the mounting plate b through the movable joint bolt.
A clamping process of a clamp for machining a dovetail of a low pressure turbine rotor blade: the lower end of the blade basin towards the blade crown is clamped on the shaft locating pin, the basin direction of the blade body of the blade is contacted with the blade body locating block, the tenon groove of the tenon is clamped on the tenon locating block, one side of the exhaust side of the blade body is propped against the side locating block and the tail locating block, the front pressure bar and the rear pressure bar are adjusted through the knurled cylinder head set screw, the side pressure head and the tail pressure head are propped against the air inlet side of the blade body, then the positions of the front pressure head and the rear pressure head on the pressure bar are adjusted, the gland is turned over, the movable joint bolt is turned over, the nut is screwed down, the compression screw and the knurled cylinder head set screw are screwed down, and the clamping of the blade is completed.
Advantageous effects
According to the utility model, the compression blocks in the blade body and the tenon tooth extension section are designed together with the compression rod, the compression amounts of the two front and rear pressure heads are respectively adjusted before clamping, and the two pressure heads on the compression rod simultaneously compress the clamped parts during the clamping process, and the positions of the two pressure heads and the blade are automatically adjusted through the spring, so that the consistency and stability of the clamping process are ensured; the turnover type integrated compaction is convenient to clamp.
Drawings
FIG. 1 is a schematic view of a clamp hold down blade configuration;
FIG. 2 is a schematic view of a blade positioning structure;
FIG. 3 is a schematic view of a gland opening configuration of the clamp;
FIG. 4 is a top view of the clamp;
FIG. 5 is a schematic view of A-A of FIG. 4;
FIG. 6 is a schematic view of B-B of FIG. 4;
FIG. 7 is a schematic view of C-C of FIG. 4;
FIG. 8 is a schematic view of a base structure;
FIG. 9 is a schematic view of a front plunger;
FIG. 10 is a schematic view of the structure of the rear presser bar;
FIG. 11 is a schematic diagram of a gland configuration;
FIG. 12 is a schematic diagram of a plunger structure;
FIG. 13 is a schematic view of a blade positioning seat;
fig. 14 is a schematic view of a support block structure.
In the figure: 1. the hydraulic pressure generating device comprises a bottom plate, 2, a supporting block, 3, a gland, 4, a compression rod, 5, a front pressure head, 6, a rear pressure head, 7, a side positioning seat, 8, a blade positioning seat, 9, a tail positioning seat, 10, a process ball pin, 11, a compression rod body, 12, a front compression rod, 13, a rear pressure rod, 14, a side pressure head, 15, a tail pressure head, 16, a tail block, 17, a compression head, 18, a deflector, 19, a blade positioning block, 20, a side positioning block, 21, a shaft positioning pin, 22, a tenon positioning block, 23, a bottom plate, 24, a mounting plate a,25, a mounting plate b,26, an ear seat, 27, a strip notch, 28, a bayonet a,29, a bayonet b,30, a U-shaped groove, 31, a mounting end, 32, a joint bolt, 33, a connecting end, 34, a compression screw, 35, a cylindrical head set screw, 36, a compression spring, 37, a positioning surface, 38, a notch, 39, a connector, 40, a mounting clamp seat, 41, a round hole, 42, a U-shaped notch, 43, a square mounting opening, 44 and a tail hole 45.
Detailed Description
The utility model will be further described with reference to the accompanying drawings in the present application, but it should not be construed that the scope of the utility model is limited to the embodiments described below. Various substitutions and alterations are made by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.
As shown in fig. 2-9, a fixture for machining the tenon teeth of the low-pressure turbine working blade comprises a base 1, a supporting block 2, a gland 3, a compression bar 4, a front pressure head 5, a rear pressure head 6, a side positioning seat 7, a blade body positioning seat 8, a tail positioning seat 9, a process ball pin 10, a compression bar body 11, a front compression bar 12, a rear compression bar 13, a side pressure head 14, a tail pressure head 15, a tail block 16, a compression head 17, a guide plate 18, a blade body positioning block 19, a side positioning block 20, knurled cylinder head set screws 35 and movable joint bolts 32;
two mounting plates a24 and b25 perpendicular to the bottom plate 23 are arranged in the middle of the base 1, ear seats 26 are arranged on two sides of the mounting plates a24 and b25, and U-shaped openings for connecting a workbench are formed in the ear seats 26; the right ear seat 26 is provided with a craft ball pin 10;
the front ends of the mounting plate a24 and the mounting plate b25 are provided with strip-shaped notches 27, and the upper ends of the mounting plate a24 and the mounting plate b25 are respectively provided with a bayonet a28 and a bayonet b29 which are consistent with the shape of the gland 3;
the side walls of the mounting plate a24 and the mounting plate b25 are respectively provided with a plurality of mounting screw holes;
the bayonet a28 is provided with a pin hole for installing a movable joint bolt downwards;
screw holes for installing the gland 3 are formed in the front end and the rear end of the bayonet b29;
the rear compression bar 13 and the front compression bar 12 are provided with a mounting end 31 and a connecting end 33;
the front end and the rear end of the compression bar body 11 are respectively provided with a U-shaped groove 30, and the middle is provided with a connecting screw hole;
the connecting end 33 of the rear compression bar 13 is arranged in the U-shaped groove 30 at the rear end of the compression bar body 11 and is connected with the compression bar body 11 through screw connection; the connecting end 33 of the front pressure lever 12 is arranged in the U-shaped groove 30 at the front end of the pressure lever body 11 and is connected with the pressure lever body 11 through screw connection;
the tail pressure head 15 is arranged at the mounting end 31 of the rear pressure rod 13, and the side pressure head 14 is arranged at the mounting end 31 of the front pressure rod 12;
one end of the tail block 16 is a mounting edge, the other end is a connecting seat, and the tail block is connected to the tail end of the bottom plate 23 through a cylindrical pin and a screw; the connecting seat is provided with a screw hole for connecting the compression screw;
the supporting block 2 is connected to the front end of the bottom plate through cylindrical pins and screws, and a tenon positioning block 22 along with the supporting block is arranged on the end face of the supporting block;
the side positioning block 20 is fixed on the side wall of the side positioning seat 7, and the side positioning seat 7 is fixed on a bottom plate 23 between the supporting block 2 and the mounting plate b24 through screws;
the blade body positioning seat 8 and the tail positioning seat 9 are arranged at the rear end of the bottom plate 23;
the side wall of the tail positioning seat 9 is provided with a tail positioning block 45;
the upper end of the blade body positioning seat 8 is provided with an inclined positioning surface 37, the positioning surface 37 is provided with a notch 38, and the blade body positioning block 19 is arranged in the notch 37;
the front end of the positioning surface 37 is a plane, the rear end is a trapezoid surface, the end face of the rear end is provided with a connecting hole, and the shaft positioning pin 21 is arranged in the connecting hole;
the compression bar 4 is L-shaped, a connector 39 is arranged, mounting clamping seats 40 are arranged at the front end and the rear end of the compression bar 4, a front pressure head 5 is arranged on the mounting clamping seats 40 at the front end of the compression bar 4 through screws, and a rear pressure head 6 is arranged on the mounting clamping seats 40 at the rear end of the compression bar 4 through screws;
the rod body of the compression rod 4 is provided with a round hole 41 for placing the compression spring 36;
a pin hole is formed in one side of the gland 3, a U-shaped notch 42 is formed in the other side of the gland, a lightening hole 44 and a square mounting opening 43 are formed in the middle cover body, a strip-shaped channel 45 consistent with the rod body of the compression rod is formed in the bottom surface of the gland 3, and a round hole for placing the compression spring 36 is formed in the channel;
the connector 39 of the rod body 4 is arranged in the square lightening hole mounting opening 43, the compression spring 36 is arranged in a cavity formed by the rod body 4 and the round hole of the gland 3, and the rod body 4 and the gland 3 are locked and fixed through a screw;
the gland 3 is arranged on a bayonet b29 of the mounting plate b25 and is connected with the compression bar 4 through bolts passing through screw holes on the bayonet b29;
the U-shaped notch 42 of the gland 3 is lapped on the bayonet a28 of the mounting plate a 24;
the movable joint bolt 32 is connected to the mounting opening on the bayonet a28, the movable joint bolt 32 is lifted to the U-shaped notch 42, and the gland 3 is locked;
the compression screw 34 is arranged on a connecting seat of the tail block 16, and a compression head 17 is arranged at the front end of the compression screw 34;
the screw holes of the side wall of the mounting plate a24 are internally provided with inclined knurled cylindrical head set screws 35, the inclined knurled cylindrical head set screws penetrate through the side wall of the mounting plate a24, the ends of the inclined knurled cylindrical head set screws are propped against the front compression rod 12 and the rear compression rod 13, and the compression of the front compression rod 12 and the rear compression rod 13 on the blades is adjusted through the elastic screws.
The blade body positioning blocks 19, the tail positioning blocks and the side positioning blocks are made of wear-resistant alloy.
The pressing head 17 is a cylindrical rubber head.
The side ram 14, the tail ram 15, the front ram 5 and the rear ram 6 are all brass.
A clamping process of a clamp for machining a dovetail of a low pressure turbine rotor blade: the lower end of the blade basin towards the blade crown is clamped on an axle locating pin 21, the basin direction of the blade body of the blade is contacted with a blade body locating block 19, the tenon groove of the tenon is clamped on a tenon locating block 22, one side of the exhaust edge of the blade body is propped against a side locating block 20 and a tail locating block 45, a front compression bar 12 and a rear compression bar 13 are adjusted through a knurled cylinder head set screw 35, a side compression head 14 and a tail compression bar 15 are propped against the air inlet edge of the blade body, then the positions of the front compression head 5 and the rear compression head 6 on the compression bar 4 are adjusted, a gland 7 is turned over, a movable joint bolt 32 is turned over, a nut is screwed down, the compression screw 34 and the knurled cylinder head set screw 35 are screwed down, and the clamping of the blade is completed.
Claims (4)
1. A fixture for machining a low pressure turbine rotor blade dovetail, characterized by: the device comprises a base, a supporting block, a gland, a compression bar, a front pressure head, a rear pressure head, a side positioning seat, a blade body positioning seat, a tail positioning seat, a process ball pin, a compression bar body, a front pressure bar, a rear pressure bar, a side pressure head, a tail block, a compression head, a guide plate, a blade body positioning block, a side positioning block, a knurled cylinder head set screw and a movable joint bolt;
two mounting plates a and b perpendicular to the bottom plate are arranged in the middle of the base, ear seats are arranged on two sides of the mounting plates a and b, U-shaped openings for connecting the workbench are arranged on the ear seats, and a process ball pin is arranged on the ear seat on the right side;
the front ends of the mounting plate a and the mounting plate b are provided with bar-shaped notches, and the upper ends of the mounting plate a and the mounting plate b are respectively provided with a bayonet a and a bayonet b which are consistent with the shape of the gland; the guide plate is arranged in the strip-shaped notch;
the side walls of the mounting plate a and the mounting plate b are respectively provided with a plurality of mounting screw holes;
the bayonet a is provided with a mounting opening for mounting a movable joint bolt downwards;
the front end and the rear end of the bayonet b are provided with pin holes for installing gland;
the rear compression bar and the front compression bar are respectively provided with a mounting end and a connecting end;
the front end and the rear end of the compression bar body are respectively provided with a U-shaped groove, and the middle of the compression bar body is provided with a connecting screw hole;
the rear compression bar connecting end is arranged in a U-shaped groove at the rear end of the compression bar body and is connected with the compression bar body through screw connection; the front pressure bar connecting end is arranged in a U-shaped groove at the front end of the pressure bar body and is connected with the pressure bar body through screw connection;
the tail pressure head is arranged at the mounting end of the rear pressure rod, and the side pressure head is arranged at the mounting end of the front pressure rod;
one end of the tail block is a mounting edge, and the other end of the tail block is a connecting seat and is connected to the tail end of the bottom plate through a cylindrical pin and a screw; the connecting seat is provided with a screw hole for connecting the compression screw;
the supporting block is connected to the front end of the bottom plate through a cylindrical pin and a screw, and a tenon positioning block along with the supporting block is arranged on the end face of the supporting block;
the side positioning block is fixed on the side wall of the side positioning seat, and the side positioning seat is fixed on the bottom plate between the supporting block and the mounting plate b through a screw;
the blade body positioning seat and the tail positioning seat are both arranged at the rear end of the bottom plate;
the side wall of the tail positioning seat is provided with a tail positioning block;
the upper end of the blade body positioning seat is an inclined positioning surface, the positioning surface is provided with a notch, and a blade body positioning block is arranged in the notch;
the front end of the positioning surface is a plane, the rear end of the positioning surface is a trapezoid surface, the end face of the rear end is provided with a connecting hole, and the shaft positioning pin is arranged in the connecting hole;
the pressure bar is L-shaped and is provided with a connector, the rear end and the front end of the pressure bar are both provided with mounting clamping seats, the front pressure head is arranged on the mounting clamping seats at the front end of the pressure bar through screws, and the rear pressure head is arranged on the mounting clamping seats at the rear end of the pressure bar through screws;
the compression rod body is provided with a round hole for placing a compression spring;
a pin hole is formed in one side of the gland, a U-shaped notch is formed in the other side of the gland, a lightening hole and a square mounting opening are formed in the middle cover body, a strip-shaped channel consistent with the rod body of the compression rod is formed in the bottom surface of the gland, and a round hole for placing the compression spring is formed in the channel;
the connector of the rod body is arranged in the square mounting opening, the compression spring is arranged in a cavity formed by the rod body and the round hole of the gland, and the rod body and the gland are locked and fixed through a screw;
the gland is arranged on the bayonet b of the mounting plate b, and is connected with the gland by passing through a screw hole on the bayonet b through a cylindrical pin;
the U-shaped notch of the gland is lapped on the bayonet a of the mounting plate a;
the movable joint bolt is connected to the mounting opening on the bayonet a, and lifted to the U-shaped notch to lock the gland;
the compression screw is arranged on the connecting seat of the tail block, and the front end head of the compression screw is provided with a compression head;
the screw holes of the side wall of the mounting plate a are internally provided with inclined annular knurl cylinder head set screws, the inclined annular knurl cylinder head set screws penetrate through the side wall of the mounting plate a, the ends of the inclined annular knurl cylinder head set screws are propped against the front compression bar and the rear compression bar, and the compression of the front compression bar and the rear compression bar on the blades is adjusted through the elastic screws.
2. The fixture for machining a dovetail of a rotor blade of a low pressure turbine according to claim 1, wherein said blade locating blocks, said tail locating blocks and said side locating blocks are each formed of a wear resistant alloy.
3. A fixture for machining a dovetail of a rotor blade of a low pressure turbine according to claim 1, wherein said compression head is a cylindrical rubber head.
4. A fixture for machining a dovetail of a rotor blade for a low pressure turbine according to claim 1, wherein said side, tail, front and rear rams are all brass;
the lower end of the blade basin towards the blade crown is clamped on the shaft locating pin, the basin direction of the blade body of the blade is contacted with the blade body locating block, the tenon groove of the tenon is clamped on the tenon locating block, one side of the exhaust edge of the blade body is propped against the side locating block and the tail locating block, the front pressure bar and the rear pressure bar are adjusted through the knurled cylinder head set screw, the side pressure head and the tail pressure head are propped against the air inlet edge of the blade body, the front pressure head and the rear pressure head on the pressure bar compress the back of the blade body, and the pressure cover is locked on the mounting plate b through the movable joint bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320404553.8U CN219255238U (en) | 2023-03-07 | 2023-03-07 | Clamp for machining tenon teeth of low-pressure turbine working blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320404553.8U CN219255238U (en) | 2023-03-07 | 2023-03-07 | Clamp for machining tenon teeth of low-pressure turbine working blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219255238U true CN219255238U (en) | 2023-06-27 |
Family
ID=86869583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320404553.8U Active CN219255238U (en) | 2023-03-07 | 2023-03-07 | Clamp for machining tenon teeth of low-pressure turbine working blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219255238U (en) |
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2023
- 2023-03-07 CN CN202320404553.8U patent/CN219255238U/en active Active
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