CN212946656U - Clamping device for machining low-pressure moving blade of marine steam turbine - Google Patents
Clamping device for machining low-pressure moving blade of marine steam turbine Download PDFInfo
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- CN212946656U CN212946656U CN202021886503.0U CN202021886503U CN212946656U CN 212946656 U CN212946656 U CN 212946656U CN 202021886503 U CN202021886503 U CN 202021886503U CN 212946656 U CN212946656 U CN 212946656U
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Abstract
The utility model relates to a blade clamping device, in particular to a clamping device for processing a low-pressure moving blade of a marine turbine, which aims to overcome the difficult problem of processing the low-pressure moving blade of the marine turbine and avoid the damage caused by the traditional processing and the clamping processing; the clamping device is fixed on the disc, a clamping space is arranged in the clamping device and used for clamping the blade root of the blade, and subsequent processing is carried out after the blade root position of the blade is fixed, so that the bottleneck encountered by an old processing method is effectively solved, the product quality is greatly improved, and the processing period is shortened. By using innovative working thinking and carefully analyzing the problems, the method not only effectively solves the working difficulties, but also creates huge economic benefits for companies. In each level, the original multiple machine tools need ten days to complete, only four days are needed to complete one machine tool at present, and the last-stage blade of each level is completed without replacing a clamp.
Description
Technical Field
The utility model relates to a blade clamping device, especially a clamping device of processing marine steam turbine low pressure moving blade.
Background
A processing method and a fixture are not adopted in the processing technology of the movable blade of the marine steam turbine, a traditional processing method (as shown in figure 1) is adopted, a flat cushion block is fixed on a machine tool workbench, a positioning pin is added on the cushion block, and then the blade is fixed on the cushion block.
If the blade crown and the blade root of the blade are clamped simultaneously (as shown in figure 2), the width of the blade root is only 10MM during machining, the clamping force is applied to the blade, the blade cannot be fixed firmly, a steam channel can vibrate during machining, the blade can be separated from the clamp to cause danger during machining, and the blade can be scrapped. The blade root, the steam inlet side and the steam outlet side are deformed due to large clamping force, and the blade cannot be used.
If the air inlet side and the air outlet side of the blade are clamped (as shown in figure 3), machining vibration is generated due to abrasion of a cutter in the machining process, indentations or marks are often generated on two positioning arc surfaces of the blade, and the indentations or the marks cannot be eliminated subsequently, so that the surface quality is influenced. Moreover, three-axis equipment is used for processing, the inner and back arcs need to be respectively positioned and processed twice, repeated positioning errors affect the measurement precision, the production efficiency is low, the internal stress transformation of the steam channel after the processing twice is uncertain, and the finished product is often deformed beyond the range.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the difficult problem of marine steam turbine low pressure movable blade processing, avoiding the damage that traditional processing and clamping processing produced, the utility model provides a clamping device of processing marine steam turbine low pressure movable blade.
In order to achieve the purpose, the clamping device for processing the low-pressure moving blade of the marine steam turbine comprises a disc and a clamping device;
the clamping device is fixed on the disc, and a clamping space is arranged in the clamping device and used for clamping the blade root of the blade.
Furthermore, the disc is provided with a positioning pin, and the clamping device is connected with the disc through the positioning pin.
Furthermore, the middle part of the disc is provided with a central hole, and the positioning pin is arranged at the central hole.
Furthermore, the clamping device comprises a first positioning block, a pressing block, a second positioning block and a second positioning bolt;
the positioning block I and the positioning block II are fixed on the circular disc, the positioning block I is U-shaped, an opening of the positioning block I is arranged towards the positioning block II, the pressing block is arranged inside the positioning block I, and the positioning bolt II is arranged in the middle of the positioning block II and arranged towards the positioning block I.
And furthermore, one side of the pressing block is arc-shaped and matched with the profile of the blade root of the blade, and the pressing block is arranged towards the second positioning block.
Still further, one end of the positioning block is a U-shaped cambered surface, the positioning block is arranged towards the pressing block through the U-shaped cambered surface, one end of the positioning block, which is the U-shaped cambered surface, is matched with the pressing block, and the clamping space is arranged on one side, which is the U-shaped cambered surface, of the positioning block.
Furthermore, the included angle between the second adjusting bolt and the positioning pin is 90 degrees.
Still further, a plurality of gaskets are arranged in the clamping space.
Further, the thickness of the gasket is 30mm-40 mm.
Has the advantages that:
the processing method has clear thought and convenient operation, not only effectively solves the bottleneck encountered by the old processing method, but also greatly improves the product quality and shortens the processing period. By using innovative working thinking and carefully analyzing the problems, the method not only effectively solves the working difficulties, but also creates huge economic benefits for companies. In each level, the original multiple machine tools need to be finished for ten days, and only four days are needed for finishing one machine tool at present. And the last stage blade of each stage is completed without replacing the fixture.
The method has the advantages that the processing reference and the measuring reference are unified, and the processing precision of the blade can be well guaranteed. The percent of pass is 100 percent. The method is very reasonable, thereby improving the production period and reducing the production cost. The method has good universality, and the same type of blade can be processed by the method.
Drawings
FIG. 1 is a schematic view of a conventional processing method;
FIG. 2 is a schematic view of simultaneously clamping a shroud and a root of a blade;
FIG. 3 is a schematic view of clamping the inlet and outlet sides of a blade;
FIG. 4 is a schematic view of the present invention;
fig. 5 is a left side view of fig. 4.
Detailed Description
The first embodiment is as follows: a clamping device for processing low-pressure moving blades of a marine turbine comprises a disc 1 and a clamping device;
the clamping device is fixed on the disc 1, a clamping space 2 is arranged in the clamping device, and the clamping space 2 is used for clamping the blade root of the blade.
The clamping space is used for fixing the blade root.
The second embodiment is as follows: the clamping device is provided with a plurality of first positioning bolts 3 and is connected with the disc 1 through the first positioning bolts 3.
Other embodiments are the same as the first embodiment.
The third concrete implementation mode: the disc 1 is provided with a positioning pin 4, and the clamping device is connected with the disc 1 through the positioning pin 4.
The positioning pin is used for fixing the end part of the blade root.
Other embodiments are the same as the first embodiment.
The fourth concrete implementation mode: the middle part of the disc 1 is provided with a central hole, and the positioning pin 4 is arranged at the central hole.
Other embodiments are the same as the third embodiment.
The fifth concrete implementation mode: the clamping device comprises a first positioning block 5, a pressing block 6, a second positioning block 7 and a second positioning bolt 8;
the positioning block I5 and the positioning block II 7 are both fixed on the disc 1, the positioning block I5 is U-shaped, the opening of the positioning block I5 is arranged towards the positioning block II 7, the pressing block 6 is arranged inside the positioning block I5, and the positioning bolt II 8 is arranged in the middle of the positioning block II 8 and is arranged towards the positioning block I5.
And the pressing block is attached to the blade root of the blade and clamps the bolt through the positioning bolt II.
The other embodiments are the same as the fourth embodiment.
The sixth specific implementation mode: one side of the pressing block 6 is arc-shaped and matched with the profile of the blade root of the blade, and the pressing block is arranged towards the second positioning block 7.
The other embodiments are the same as the fifth embodiment.
The seventh embodiment: and the included angle between the second adjusting bolt 9 and the positioning pin 4 is 90 degrees.
The other embodiments are the same as the fifth embodiment.
The specific implementation mode is eight: a plurality of gaskets are arranged in the clamping space 2.
Other embodiments are the same as the first embodiment.
The specific implementation method nine: the thickness of the gasket is 30mm-40 mm.
The other embodiments are the same as the eighth embodiment.
The working principle is as follows:
the clamping device is fixed on a machine tool, a pressing block with a corresponding radian is selected according to the profile of the air inlet side of the blade root, the pressing block is placed into a first positioning block, the blade root is inserted into a clamping space, a positioning bolt is screwed to clamp the top of the blade root, a positioning pin is screwed so that the positioning pin is screwed into the end part of the blade root, the blade root is fixed, the radial working face of the air inlet side of the clamp is positioned, the blade is prevented from overturning or displacing, and the end face of the blade root is positioned so that the X-axis does not move in the machining process.
Firstly, a tool with the diameter of 40R6 is adopted to carry out rough machining on a steam passage part, a 1.0mm allowance is left for finish milling, then a tool with the diameter of 16R2.4 is selected to carry out semi-finish milling and milling on the steam passage part, a root crown fillet and a middle lacing wire part, a tool with the diameter of 16R4 is used for carrying out finish machining on the steam passage part, finally a taper alloy R6 tool is selected to mill a blade root fillet, and all the procedures are finished.
Claims (9)
1. The utility model provides a clamping device of processing marine steam turbine low pressure moving blade which characterized in that: it comprises a disc (1) and a clamping device;
the clamping device is fixed on the disc (1), a clamping space (2) is arranged in the clamping device, and the clamping space (2) is used for clamping the blade root of the blade.
2. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 1, wherein: the clamping device is provided with a plurality of first positioning bolts (3), and the clamping device is connected with the disc (1) through the first positioning bolts (3).
3. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 1, wherein: the disc (1) is provided with a positioning pin (4), and the clamping device is connected with the disc (1) through the positioning pin (4).
4. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 3, wherein: the middle part of the disc (1) is provided with a central hole, and the positioning pin (4) is arranged at the central hole.
5. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 4, wherein: the clamping device comprises a first positioning block (5), a pressing block (6), a second positioning block (7) and a second positioning bolt (8);
the U-shaped positioning structure is characterized in that the first positioning block (5) and the second positioning block (7) are fixed on the disc (1), the first positioning block (5) is U-shaped, the opening of the first positioning block (5) faces the second positioning block (7), the pressing block (6) is arranged inside the first positioning block (5), and the second positioning bolt (8) is arranged in the middle of the second positioning block (7) and faces the first positioning block (5).
6. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 5, wherein: one side of the pressing block (6) is arc-shaped and matched with the profile of the blade root of the blade, and the pressing block is arranged towards the second positioning block (7).
7. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 5, wherein: and the included angle between the second positioning bolt (8) and the positioning pin (4) is 90 degrees.
8. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 1, wherein: a plurality of gaskets are arranged in the clamping space (2).
9. The clamping device for machining the low-pressure moving blade of the marine turbine as claimed in claim 8, wherein: the thickness of the gasket is 30mm-40 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021886503.0U CN212946656U (en) | 2020-09-02 | 2020-09-02 | Clamping device for machining low-pressure moving blade of marine steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021886503.0U CN212946656U (en) | 2020-09-02 | 2020-09-02 | Clamping device for machining low-pressure moving blade of marine steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212946656U true CN212946656U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021886503.0U Active CN212946656U (en) | 2020-09-02 | 2020-09-02 | Clamping device for machining low-pressure moving blade of marine steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212946656U (en) |
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2020
- 2020-09-02 CN CN202021886503.0U patent/CN212946656U/en active Active
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