CN115122193B - Wheel disc blade top grinding auxiliary device - Google Patents
Wheel disc blade top grinding auxiliary device Download PDFInfo
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- CN115122193B CN115122193B CN202210937152.9A CN202210937152A CN115122193B CN 115122193 B CN115122193 B CN 115122193B CN 202210937152 A CN202210937152 A CN 202210937152A CN 115122193 B CN115122193 B CN 115122193B
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- wheel disc
- main shaft
- blade
- stage wheel
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- 238000003825 pressing Methods 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008439 repair process Effects 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The application relates to the technical field of steam turbines, in particular to a wheel disc blade top grinding auxiliary device. The single-stage wheel disc of the wheel disc blade top grinding auxiliary device comprises at least two blades which need to be processed when in use, the blades are mounted on the single-stage wheel disc in an adapting mode, then the main shaft is mounted on a machine tool together for processing, a cutter head on the main shaft can serve as a processing reference surface, the size of the blades after grinding is accurately determined, after the blades of one specification are processed, the blades of the other specification are mounted on the single-stage wheel disc in the adapting mode, and grinding of the blades of the other specification can be achieved through replacement of the single-stage wheel disc. Compared with the mode that directly installs the blade on the gas turbine rotor and process among the prior art, the auxiliary device of this application can realize the processing to the blade on the single-stage rim plate on the gas turbine rotor, and frock simple structure, processing manufacturing is convenient, has improved the grinding efficiency of blade.
Description
Technical Field
The application relates to the technical field of gas turbines, in particular to a wheel disc blade top grinding auxiliary device.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
In the middle repair process of the gas turbine, the turbine end blade is usually required to be replaced, and the blade tip is required to be machined before blade replacement to meet the requirement of through-flow clearance due to the high requirement of precision of the end part of the turbine end blade. The gas turbine rotor is formed by overlapping multistage rotor disks through Hertz teeth, and blades are fixed on the periphery of the rotor disks. In the existing turbine end blade processing process, the blade is required to be installed on a rotor wheel disc, and then the top of the blade is ground by a numerical control lathe on a rotor formed by overlapping the rotor wheel discs.
As shown in fig. 1, in the middle repair process of a gas turbine, the gas turbine rotor cannot be returned to a factory, only the gas turbine rotor manufactured in the factory can be used as a tool when the blade tops of the blades are ground, the blades to be machined are installed on the gas turbine rotor, then the blades are machined by a numerical control lathe, and the blades are transported to the middle repair power plant after being machined. The blade grinding mode has the advantages that the production efficiency of the gas turbine is affected due to the fact that the gas turbine rotor is required to be manufactured, the gas turbine rotor is complex in structure and heavy in weight, the operation of conveying the gas turbine rotor in the blade machining process is complex, machining is inconvenient, and the blade grinding efficiency is low.
Disclosure of Invention
An object of the embodiment of the application is to provide a rim plate blade top grinding auxiliary device for solve the inconvenient technical problem of blade grinding on the rotor in the current gas turbine middle repair process, blade grinding inefficiency.
In a first aspect, there is provided a wheel disc blade tip grinding aid comprising:
the main shaft is arranged on the machine tool and is driven to rotate by a power shaft of the machine tool;
the single-stage wheel discs comprise at least two single-stage wheel discs, wherein the outer circumference of each single-stage wheel disc is provided with a blade mounting structure for mounting blades, and in each single-stage wheel disc, different single-stage wheel discs are used for mounting blades with different lengths; each single-stage wheel disc is alternatively arranged on the main shaft, is coaxial with the main shaft and can rotate along with the main shaft;
the cutter head is used for being fixed on the main shaft and coaxial with the main shaft, and is positioned on one side of the single-stage wheel disc on the main shaft in the axial direction of the main shaft, and the outer circumferential surface of the cutter head is used as a processing reference surface to determine the radial dimension of the blade installed on the current single-stage wheel disc after being ground.
In a possible embodiment, the auxiliary device for grinding the tip of the wheel disc blade comprises a pressing element which is screwed onto the spindle and presses the single-stage wheel disc onto the spindle in the axial direction of the spindle.
In a possible implementation scheme, the pair of cutterheads and the single-stage wheel disc are both used for being connected in series on the main shaft, a positioning shaft shoulder is arranged on the main shaft, the pair of cutterheads and the positioning shaft shoulder are in positioning fit on the axial direction of the main shaft, the pair of cutterheads is located between the shaft shoulder and the single-stage wheel disc on the main shaft on the axial direction of the main shaft, and the pair of cutterheads and the single-stage wheel disc on the main shaft are both pressed and fixed on the main shaft through the pressing piece.
In a possible implementation scheme, a cushion block is arranged between the counter cutterhead and the single-stage wheel disc on the main shaft, and the cushion block is used for separating the single-stage wheel disc from the counter cutterhead.
In one possible implementation, the pair of cutterheads is spaced from a single-stage disc on the spindle.
In a possible implementation scheme, the wheel disc blade top grinding auxiliary device further comprises a blade installation auxiliary tool, wherein the blade installation auxiliary tool comprises a mounting bracket, and the mounting bracket is used for being detachably fixed with the cutter disc in a horizontal state when the blade is installed on the single-stage wheel disc, so that the axis of the main shaft is vertically arranged, and the single-stage wheel disc on the main shaft is positioned on the upper side of the cutter disc.
In one possible implementation, the mounting bracket includes a horizontally disposed tool fixing plate for supporting the cutterhead and for detachably fixing the cutterhead.
In a possible implementation scheme, the wheel disc blade top grinding auxiliary device further comprises a turning tool for assisting the main shaft to be leveled after the blade is mounted on the single-stage wheel disc, wherein the turning tool comprises a long connecting shaft, a turning support and a bearing support, and the long connecting shaft is used for being detachably fixed with one end of the main shaft so as to be detached before the main shaft is lifted to a machine tool;
after the blades are mounted on the single-stage wheel disc on the mounting bracket, the extension shaft is hinged on the turning bracket so that the main shaft can swing to a horizontal state;
the bearing bracket is used for supporting the main shaft together with the mounting bracket after the main shaft is leveled, so that the main shaft is kept horizontal.
In a possible implementation scheme, the extension shaft comprises an extension shaft flange, a main shaft flange corresponding to the extension shaft flange is arranged on the main shaft, the extension shaft flange is detachably fixed with the main shaft flange through bolts, and the outer peripheral surface of the main shaft flange is a clamping surface for clamping a clamping jaw of a machine tool.
In a possible embodiment, the roulette blade tip grinding aid further comprises a hydrostatic bracket for supporting the spindle after it has been mounted to the machine tool.
The wheel disc blade top grinding auxiliary device has the beneficial effects that: the utility model provides a rim plate blade top grinding auxiliary device's single-stage rim plate has two at least, installs the blade that will process on the single-stage rim plate of adaptation during the use, then installs the main shaft together and process on the lathe, and the epaxial cutter head can be regarded as the processing reference surface, the size after the accurate blade grinding of confirming, after the blade processing of one kind of specification is accomplished, installs the blade of another specification on the single-stage rim plate of adaptation, can realize the grinding to the blade of another specification through changing the single-stage rim plate. Compared with the mode that directly installs the blade on the gas turbine rotor and process among the prior art, the auxiliary device of this application can realize realizing alone the processing to the blade on every single-stage rim plate on the gas turbine rotor, and frock simple structure, the flexibility is good, need not to borrow the gas turbine rotor in the manufacturing, and the processing manufacturing of blade is convenient, has improved the grinding efficiency of blade.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a prior art gas turbine prior art rotor blade grinding process;
FIG. 2 is a schematic view of a spindle mounted to a machine tool according to an embodiment of the wheel disc blade tip grinding aid apparatus of the present application;
fig. 3 is a schematic structural view of a turning tool according to an embodiment of the wheel disc blade tip grinding auxiliary device of the present application;
FIG. 4 is a schematic view of a blade mounting aid shown in an embodiment of a roulette blade tip grinding aid according to the present application;
FIG. 5 is a cross-sectional view of a spindle shown mounted to a machine tool in accordance with an embodiment of the roulette wheel blade tip grinding aid device;
FIG. 6 is a front view of a blade attachment aid shown in accordance with an embodiment of a roulette blade tip grinding aid in accordance with the present application;
FIG. 7 is a cross-sectional view of a blade attachment aid shown in accordance with an embodiment of a roulette blade tip grinding aid in accordance with the present application;
fig. 8 is a schematic diagram of an assembling structure of a turning tool and a turning bracket according to an embodiment of a wheel disc blade tip grinding auxiliary device;
FIG. 9 is a cross-sectional view taken along line A-A of FIG. 8;
FIG. 10 is a schematic diagram showing a laser detection device working in conjunction with a machine tool according to an embodiment of the wheel disc blade tip grinding aid device of the present application;
FIG. 11 is a flow chart of a blade grinding process shown in an embodiment of a wheel disc blade tip grinding aid;
in the figure: 1. a main shaft; 11. a thimble matching groove; 12. a threaded connection section; 13. positioning a shaft shoulder; 14. a spindle flange; 2. a machine tool; 21. a thimble; 22. a machine tool claw; 3. a single-stage wheel disc; 4. the cutter head is matched; 5. a blade; 6. a laser measuring device; 7. a pressing member; 8. a cushion block; 9. a rotation stopping key; 10. a lock nut; 101. a handle threaded hole; 102. a mounting bracket; 1021. a tool fixing plate; 1022. a bottom plate; 1023. a column; 1024. a main shaft accommodation space; 103. a fixing bolt; 104. a long shaft is connected; 1041. a flange of the extension shaft; 1042. a hinge hole; 105. a turning-over bracket; 1051. a hinged support; 1052. a hinge ear; 106. a support bracket; 107. a connecting pin; 1071. a connecting pin cap; 108. a connecting pin screw; 109. a hanging ring; 110. static pressure brackets.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
According to a first aspect of the present application, there is provided a wheel disc blade tip grinding aid, and fig. 2 is a schematic structural view of a spindle mounted to a machine tool in the wheel disc blade tip grinding aid according to an embodiment of the present application.
The wheel disc blade tip grinding auxiliary device comprises a main shaft 1, wherein the main shaft 1 is used for being installed on a machine tool 2 and driven to rotate by a power shaft of the machine tool.
The wheel disc blade top grinding auxiliary device further comprises a single-stage wheel disc 3 and a pair of cutter discs 4, wherein the single-stage wheel disc 3 is detachably fixed on the main shaft 1, the pair of cutter discs 4 is fixed on the main shaft 1, the single-stage wheel disc 3 comprises at least two single-stage wheel discs, the outer circumference of each single-stage wheel disc 3 is provided with a blade mounting structure for mounting blades 5, and in each single-stage wheel disc 3, different single-stage wheel discs 3 are used for mounting blades 5 with different lengths; the single-stage sheaves 3 are alternatively mounted on the spindle 1 and are coaxial with the spindle 1 and rotatable with the spindle 1.
The pair of cutterheads 4 is coaxial with the main shaft 1, is positioned on one side of the single-stage wheel disc 3 on the main shaft 1 in the axial direction of the main shaft 1, and the outer circumferential surface of the pair of cutterheads 4 is used as a machining reference surface to determine the radial dimension of the blades 5 installed on the current single-stage wheel disc 3 after being ground. The radial dimension of a blade in this application refers to the length dimension of the blade, i.e. the dimension between the blade root and the blade tip.
In order to facilitate the processing of the blade 5, the volume of the auxiliary device is reduced, and the blade 5 is processed step by step in the method, namely, after the processing of a certain stage of blade 5 on the rotor of the gas turbine is completed through the single-stage wheel disc 3, the blade 5 adapted by the new single-stage wheel disc 3 is replaced, and the blade 5 of the new stage is processed until all the blades 5 are processed. Through the rim plate of change and blade 5 adaptation, need not to turn each single-stage rim plate 3 simultaneously to main shaft 1 on, very big simplification auxiliary device's structure has improved auxiliary device's simple operation nature.
In addition, by arranging the cutter head 4 on the main shaft 1 and matching with the laser measuring device 6 on the machine tool 2, the size of the blade 5 after grinding can be accurately measured, and whether the size of the blade after grinding meets the requirement or not can be judged according to the measured size.
In order to increase the dismounting speed of the spindle 1, in one embodiment, the spindle 1 and the power shaft on the machine tool 2 are tightly pressed by a thimble. Specifically, the two ends of the spindle 1 are respectively provided with a thimble matching groove 11 for the thimble to push up, when the spindle 1 is installed on the machine tool 2, two thimbles 21 arranged in the axial direction of the spindle 1 push into the thimble matching grooves 11, and when the power shaft of the machine tool 2 rotates, the spindle 1 can be driven to rotate.
In one embodiment, the blades An Zhuaijie are configured to mount the blades 5 on the rotor of the prior art, and the blades 5 are clamped by the blade root at the blade mounting structure, which is not described in detail herein.
In order to improve the machining precision of the blade 5, in one embodiment, the size of the single-stage wheel disc 3 is adapted to the size of the blade 5 to be machined, and the specific adaptation form is as follows: the size of the single-stage wheel disc 3 adopts the size of the rotor wheel disc of the gas turbine on the rotor of the gas turbine to be mounted with the blade 5 to be processed, so that the mounting environment of the blade 5 to be processed is close to the mounting environment in actual working, and the precision of the blade 5 after processing is higher and the grinding efficiency can be improved.
Specifically, in this embodiment, a plurality of single-stage wheel discs 3 are provided, and the number of single-stage wheel discs 3 is determined according to the number of stages of the blades 5 on the rotor of the gas turbine, where the number of single-stage wheel discs 3 may be greater than the number of stages of the blades 5 on the rotor of the gas turbine or may be smaller than the number of stages of the blades 5 on the rotor of the gas turbine, as required. In some applications, the number of single-stage disks 3 may be sufficient for the machining of the blades 5 on both gas turbine rotors.
Since the single-stage wheel disc 3 is alternatively mounted on the spindle 1, in order to facilitate the mounting of the single-stage wheel disc 3, in one embodiment, the tip grinding auxiliary device for the wheel disc blade 5 includes a pressing member 7, and the pressing member 7 is screwed on the spindle 1 and presses the single-stage wheel disc 3 on the spindle 1 in the axial direction of the spindle 1. The spindle 1 is provided with a threaded connection section 12 in threaded connection with the pressing piece 7, and the periphery of the threaded connection section 12 is provided with a connecting thread matched with the pressing piece 7. When the single-stage wheel disc 3 is required to be installed, the single-stage wheel disc 3 is arranged on the main shaft 1 in series, and then the compressing piece 7 is screwed to compress the single-stage wheel disc 3. When the single-stage wheel disc 3 is disassembled, the pressing piece 7 is unscrewed, and then the single-stage wheel disc 3 is disassembled.
In one embodiment, a positioning shaft shoulder 13 is arranged on the main shaft 1, the cutter head 4 and the single-stage wheel disc 3 are all arranged on the main shaft 1 in series, the cutter head 4 and the positioning shaft shoulder 13 are matched in a positioning way in the axial direction of the main shaft 1, the cutter head 4 is positioned between the positioning shaft shoulder 13 and the single-stage wheel disc 3 on the main shaft 1 in the axial direction of the main shaft 1, and the cutter head 4 and the single-stage wheel disc 3 on the main shaft 1 are tightly pressed and fixed on the main shaft 1 through a pressing piece 7. A cushion block 8 for separating the single-stage wheel disc 3 from the counter-stage wheel disc 4 is arranged between the counter-stage wheel disc 4 and the single-stage wheel disc 3, after the pressing piece 7 is pressed, the counter-stage wheel disc 4 is tightly matched with the positioning shaft shoulder 13, the cushion block 8 is pressed between the counter-stage wheel disc 4 and the single-stage wheel disc 3, and the single-stage wheel disc 3 is tightly matched with the pressing piece 7. When the single-stage wheel disc 3 is detached, the pressing piece 7 is unscrewed, and then the single-stage wheel disc 3 can be detached. The cutter head 4 is used as a machining reference, generally, disassembly is not needed, and the cutter head 4 and the main shaft 1 are made into a split structure so as to facilitate machining. In some embodiments, the cutterhead may be integral with the spindle.
Specifically, the shaft section of the main shaft 1 for installing the single-stage wheel disc 3 is arranged on a key groove, a rotation stopping key 9 is fixed in the key groove through a screw, the single-stage wheel disc 3 is provided with a wheel disc key groove matched with the rotation stopping key 9, the wheel disc key groove extends along the axial direction of the main shaft 1, and the wheel disc key groove is arranged on the hole wall of the central hole of the single-stage wheel disc 3. When the single-stage wheel disc 3 is installed, the single-stage wheel disc 3 is axially and serially installed on the main shaft 1 along the main shaft 1, and the rotation stopping key 9 enters a wheel disc key groove, so that rotation stopping of the single-stage wheel disc 3 and the main shaft 1 is realized.
The pressing member 7 is a pressing nut, and in order to prevent the pressing nut from loosening, in one embodiment, a locking nut 10 is provided on the spindle 1, and the locking nut 10 is located on a side of the pressing nut facing away from the single-stage wheel disc 3. In order to facilitate the disassembly of the compression nut and the lock nut 10, in this embodiment, a handle threaded hole 101 extending radially along the spindle 1 is provided on the compression nut and the lock nut 10, and the handle threaded hole 101 is used for installing an operating handle, so that the compression nut and the lock nut 10 are convenient to disassemble and assemble.
The influence of the cutter disc 4 on the grinding wheel of the grinding blade 5 can be reduced by separating the cutter disc 4 from the single-stage wheel disc 3, so that the grinding operation of the grinding wheel is facilitated. In one embodiment, to further reduce the impact, the outside diameter of the cutterhead 4 is smaller than the outside diameter of the single stage disc 3, so that during grinding of the blades 5, the cutterhead 4 has little impact on the grinding wheel.
In order to facilitate the installation of the blade 5 onto the single-stage wheel disc 3, in one embodiment, the wheel disc blade top grinding auxiliary device further comprises a blade installation auxiliary tool, wherein the blade installation auxiliary tool comprises a mounting bracket 102, and the mounting bracket 102 is used for being detachably fixed with the counter cutterhead 4 in a horizontal state when the blade 5 is installed on the single-stage wheel disc 3, so that the axis of the main shaft 1 is vertically arranged, and the single-stage wheel disc 3 on the main shaft 1 is positioned on the upper side of the counter cutterhead 4.
Specifically, as shown in fig. 4, 6 and 7, the mounting bracket 102 includes a horizontally disposed fixture fixing plate 1021, where the fixture fixing plate 1021 is used to support the cutterhead 4 and is used to detachably fix the cutterhead 4. The upper side plate surface of the tool fixing plate 1021 is used for being in contact with the cutter head 4, the tool fixing plate 1021 is provided with a fixing plate hole extending up and down, the cutter head 4 is provided with a cutter head hole extending along the axial direction of the spindle 1, and after the fixing bolt 103 for fixing the tool fixing plate 1021 and the cutter head 4 passes through the cutter head hole and the fixing hole, the cutter head 4 and the tool fixing plate 1021 are fixed together.
As shown in fig. 4 and 7, the mounting bracket 102 includes a base plate 1022 and columns 1023, a tool fixing plate 1021 is fixed to the top of the columns 1023, the columns 1023 are provided in plurality, and a spindle accommodating space 1024 accommodating the spindle 1 is formed between the columns 1023.
After the cutter disc 4, the single-stage wheel disc 3 and the main shaft 1 are assembled together, the single-stage wheel disc 3 is fixed on a blade installation auxiliary tool, the main shaft 1 is vertically arranged, the single-stage wheel disc 3 is positioned on the upper side of the cutter disc 4, and when the blades 5 are installed on the outer circumference of the single-stage wheel disc 3, the single-stage wheel disc 3 is not required to be rotated for installation, and the operation is simple and convenient.
Since the spindle 1 is in a vertical state when the blade 5 is mounted on the single-stage wheel disc 3, and the spindle 1 needs to be mounted on the machine tool 2 in a horizontal posture, in order to facilitate posture conversion of the spindle 1, in one embodiment, the wheel disc blade tip grinding assisting device further comprises a turning tool for assisting leveling of the spindle 1 after the blade 5 is mounted on the single-stage wheel disc 3.
As shown in fig. 3, 8 and 9, the turning tool comprises a long connecting shaft 104, a turning support 105 and a bearing support 106, wherein the long connecting shaft 104 is used for being detachably fixed with one end of the main shaft 1 so as to be detached and separated from the main shaft 1 before the main shaft 1 is lifted to the machine tool 2; after the blade 5 is mounted on the single-stage wheel disc on the mounting bracket 102, the extension shaft 104 is used for being hinged on the turning bracket 105 so that the main shaft 1 can swing to a horizontal state; the support bracket 106 is used to support the spindle 1 together with the mounting bracket 102 after the spindle 1 is leveled, so that the spindle 1 is kept horizontal.
Specifically, the extension shaft 104 includes an extension shaft flange 1041, more than two bolt holes are arranged on the extension shaft flange 1041 along the circumferential direction of the extension shaft 104, a main shaft flange 14 corresponding to the extension shaft flange 1041 is arranged on the main shaft 1, the extension shaft flange 1041 is detachably fixed with the main shaft flange 14 through bolts passing through the bolt holes, and the outer circumferential surface of the main shaft flange 14 is a clamping surface for clamping the machine tool clamping jaws 22. The extension shaft 104 is pre-fixed to the main shaft 1 before the blades 5 are mounted to the single stage disc 3 for ease of handling.
The long shaft 104 is further provided with two hinge holes 1042, the two hinge holes 1042 are perpendicularly intersected, and the center line of the hinge hole 1042 is perpendicular to the axis of the long shaft 104. The two hinge holes 1042 facilitate the connection of the longitudinal shaft 104 to the turn-over bracket 105. The turn-over bracket 105 comprises a hinge bracket 1051, two hinge lugs 1052 are arranged on the hinge bracket 1051, after the long connecting shaft 104 is arranged on the turn-over bracket 105, the hinge bracket 1051 is positioned between the two hinge lugs 1052, the hinge pin 107 penetrating through the two hinge lugs 1052 and the long connecting shaft 104 is connected with the long connecting shaft 104, the connecting pin 107 penetrates through hinge holes 1042 and lug holes on the hinge lugs 1052, one end of the connecting pin 107 is provided with a connecting pin cap 1071 in blocking fit with the hinge lugs 1052, the other end of the connecting pin 107 is connected with a connecting pin screw 108, the end face of the connecting pin 107 is provided with a threaded hole, and after the connecting pin screw 108 is screwed into the threaded hole, a screw head of the connecting pin screw 108 is in blocking fit with one hinge lug 1052, so that the connecting pin 107 is placed through the connecting pin cap 1071 and the screw head of the connecting screw. When the extension shaft 104 is separated from the hinge support 1051, the connecting pin screw 108 is removed, and the connecting pin 107 is pulled out.
In an embodiment, in order to facilitate lifting and carrying of the spindle 1, the spindle flange 14 is fixed at one end of the spindle 1, the other end of the spindle 1 is a lifting end at the upper end when the blade 5 to be processed is installed, the lifting end is provided with a lifting ring 109, and after the blade 5 and the single-stage wheel disc 3 are assembled, the spindle 1 is lifted to a turning tool from the blade installation auxiliary device through the lifting ring 109. The lifting end is provided with lifting ring mounting holes for mounting lifting rings 109, and the lifting ring mounting holes are staggered in the axial direction of the main shaft 1 so as to prevent the main shaft 1 from being penetrated by the lifting ring mounting holes and ensure the strength of the main shaft 1. The lifting ring mounting hole is a threaded hole, and the lifting ring 109 is screwed into the lifting ring mounting hole.
The wheel blade tip grinding aid also includes a static pressure bracket 110, and in order to improve stability of the spindle 1, the spindle 1 is supported by the static pressure bracket 110 after the spindle 1 is mounted on the machine tool 2. Specifically, the hydrostatic carrier 110 is provided in two, on both sides of the single-stage wheel 3 in the axial direction of the spindle 1.
In one embodiment, the wheel disc blade tip grinding auxiliary device is used for middle repair of a gas turbine, when a failed blade 5 of a gas turbine unit is replaced, a new blade 5 needs to be ground, and the blade 5 needing to be replaced is subjected to auxiliary grinding through the auxiliary device.
When the wheel disc blade tip grinding auxiliary device in the application adopts the above preferred embodiment, the following manner of using the processing blade 5 is adopted:
as shown in fig. 11, the spindle 1, the counter disc 4 and the single-stage wheel disc 3 are assembled together, the extension shaft 104 is fixed at one end of the spindle 1, the assembled spindle 1, counter disc 4 and single-stage wheel disc 3 are fixed on the mounting bracket 102 of the blade mounting auxiliary tool, the counter disc 4 and the tool fixing plate 1021 are fixed together through bolts, the spindle 1 is erected, the blade 5 is mounted on the single-stage wheel disc 3, then the spindle 1 is lifted by means of a lifting tool and then moved to the position of the turning tool, the hinged support 1051 on the turning bracket is connected with the extension shaft 104 through the connecting pin 107, then the spindle 1 is horizontally placed, one end of the spindle 1 is supported by the supporting bracket 106, then the spindle 1 and parts on the spindle 1 are lifted to the machine tool 2 through the lifting tool and are mounted on the machine tool 2, and grinding operation of the blade 5 on the single-stage wheel disc 3 is started.
In the grinding process, as shown in fig. 10, a laser measuring device 6 matched with the machine tool 2 is firstly used for determining the coordinate position according to the outer peripheral surface of the cutterhead 4, and then the size of the blade 5 after grinding is measured by the laser measuring device 6 until the blade 5 is ground to meet the requirement.
After the grinding of the blade 5 of one stage is completed, the single-stage wheel disc 3 corresponding to the blade 5 is disassembled, the single-stage wheel disc 3 corresponding to the blade 5 of the other stage is replaced, and the steps are repeated to grind the new blade 5.
In one embodiment, the counter cutterhead 4 is spaced from the single-stage disc 3 on the spindle 1. Besides the separation by the cushion block 8, a shaft shoulder can be arranged between the cutter head and the single-stage wheel disc, and the cutter head and the single-stage wheel disc are independently fixed on the main shaft.
In one embodiment, the pressing piece directly presses the single-stage wheel disc on the shaft shoulder, the single-stage wheel disc is pressed on the other side of the shaft shoulder through the other pressing piece, and the shaft shoulder is positioned between the single-stage wheel disc and the opposite cutter disc.
In one embodiment, the single-stage wheel disc is contacted with the counter-cutterhead, and annular protrusions protruding towards the single-stage wheel disc are integrally arranged on the counter-cutterhead, and are contacted with the single-stage wheel disc through the annular protrusions and axially positioned. In one embodiment, a single stage wheel disc is attached to the counter disc without a gap therebetween.
In one embodiment, the spindle is horizontally disposed when the blade is mounted, and the spindle is rotated while the blade is mounted.
According to the technical scheme, the grinding auxiliary device adopts the single-stage wheel disc to install the blades, is matched with the machine tool, realizes the step-by-step processing of the blades, and ensures the blade grinding precision through the cutter disc on the main shaft. The grinding auxiliary device is simple in structure, convenient to process and manufacture, and convenient and efficient to practical use. Because the blade is processed step by step, the gas turbine rotor does not need to be lifted, the flexibility of the auxiliary device is better, the blade is convenient to process, and the grinding efficiency of the blade is improved.
In addition, the excircles at the two ends of the main shaft can be supported by using a static pressure bracket of the machine tool, so that good rigidity in the grinding process is ensured.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a rim plate blade tip grinding auxiliary device which characterized in that includes:
a main shaft (1) which is arranged on the machine tool (2) and is driven to rotate by a power shaft of the machine tool (2);
the single-stage wheel discs (3) comprise at least two single-stage wheel discs, the outer circumference of each single-stage wheel disc (3) is provided with a blade mounting structure for mounting blades (5), and in each single-stage wheel disc (3), different single-stage wheel discs (3) are used for mounting blades (5) with different lengths; each single-stage wheel disc (3) is alternatively arranged on the main shaft (1), is coaxial with the main shaft (1) and can rotate along with the main shaft (1);
the cutter head (4) is fixed on the main shaft (1) and is coaxial with the main shaft (1), and is positioned on one side of the single-stage wheel disc (3) on the main shaft (1) in the axial direction of the main shaft (1), and the outer circumferential surface of the cutter head (4) is used as a machining reference surface to determine the radial size of the blades (5) installed on the current single-stage wheel disc (3) after being ground;
the wheel disc blade top grinding auxiliary device further comprises a blade installation auxiliary tool, the blade installation auxiliary tool comprises a mounting bracket (102), the mounting bracket (102) is used for being detachably fixed with the opposite cutter disc (4) in a horizontal state when the blade (5) is installed on the single-stage wheel disc (3), so that the axis of the main shaft (1) is vertically arranged, and the single-stage wheel disc (3) on the main shaft (1) is positioned on the upper side of the opposite cutter disc (4);
the wheel disc blade top grinding auxiliary device further comprises a turning tool used for assisting the main shaft (1) to be leveled after the blade (5) is mounted on the single-stage wheel disc (3), the turning tool comprises a long connecting shaft (104), a turning support (105) and a bearing support (106), and the long connecting shaft (104) is used for being detachably fixed with one end of the main shaft (1) so as to be detached before the main shaft (1) is lifted to a machine tool (2);
after the blade (5) is mounted on the single-stage wheel disc (3) on the mounting bracket (102), the extension shaft (104) is used for being hinged on the turning-over bracket (105) so that the main shaft (1) can swing to a horizontal state;
the bearing bracket (106) is used for supporting the main shaft (1) together with the mounting bracket (102) after the main shaft (1) is put flat, so that the main shaft (1) is kept horizontal.
2. Wheel disc blade tip grinding aid according to claim 1, characterized in that the wheel disc blade tip grinding aid comprises a pressing piece (7), which pressing piece (7) is screwed onto the main shaft (1) and presses the single-stage wheel disc (3) onto the main shaft (1) in the axial direction of the main shaft (1).
3. The wheel disc blade top grinding auxiliary device according to claim 2, wherein the counter cutterhead (4) and the single-stage wheel disc (3) are both used for being connected in series on the main shaft (1), a positioning shaft shoulder (13) is arranged on the main shaft (1), the counter cutterhead (4) and the positioning shaft shoulder (13) are in positioning fit in the axial direction of the main shaft (1), the counter cutterhead (4) is located between the positioning shaft shoulder (13) and the single-stage wheel disc (3) on the main shaft (1) in the axial direction of the main shaft (1), and the counter cutterhead (4) and the single-stage wheel disc (3) on the main shaft (1) are tightly fixed on the main shaft (1) through the pressing piece (7).
4. A wheel disc blade tip grinding auxiliary device according to claim 3, characterized in that a cushion block (8) is arranged between the counter disc (4) and the single-stage wheel disc (3) on the main shaft (1), and the cushion block (8) is used for separating the single-stage wheel disc (3) from the counter disc (4).
5. Wheel disc blade tip grinding aid according to claim 1, characterized in that the counter disc (4) is arranged at a distance from the single-stage wheel disc (3) on the main shaft (1).
6. The wheel disc blade tip grinding aid according to claim 1, wherein the mounting bracket (102) comprises a horizontally arranged tooling fixing plate (1021), the tooling fixing plate (1021) being used for supporting the counter disc (4) and for detachable fixing with the counter disc (4).
7. The wheel disc blade tip grinding auxiliary device according to claim 1, wherein the extension shaft (104) comprises an extension shaft flange (1041), a main shaft flange (14) corresponding to the extension shaft flange (1041) is arranged on the main shaft (1), the extension shaft flange (1041) is detachably fixed with the main shaft flange (14) through bolts, and the outer peripheral surface of the main shaft flange (14) is a clamping surface for clamping a machine tool clamping jaw (22).
8. Wheel disc blade tip grinding aid according to any of claims 1-5, characterized in that the wheel disc blade tip grinding aid further comprises a static pressure bracket (110) for supporting the spindle (1) after the spindle (1) is mounted to the machine tool (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210937152.9A CN115122193B (en) | 2022-08-05 | 2022-08-05 | Wheel disc blade top grinding auxiliary device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210937152.9A CN115122193B (en) | 2022-08-05 | 2022-08-05 | Wheel disc blade top grinding auxiliary device |
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| CN115122193B true CN115122193B (en) | 2024-03-19 |
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Also Published As
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| CN115122193A (en) | 2022-09-30 |
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