Machining tool for mounting hole of swirler blade of gas turbine

Abstract

A machining tool for a blade mounting hole of a gas turbine cyclone comprises a base, the base comprises a horizontal bottom plate and an inclined plate on the bottom plate, the inclined plate is provided with a tool setting plane, a tool setting groove and a tool setting reference used for machining, a bearing is arranged between a central hole of the inclined plate and a mandrel table, and the mandrel table is formed by sleeving a mandrel on a flat plate. A central hole of an inclined plate of the base is used for allowing a mandrel of the mandrel table to penetrate through, an end cover is arranged at the bottom end of the mandrel table, the mandrel table is fixed to the lower bottom of the inclined plate of the base through the end cover and a bolt, when the bolt is tightened and fixes the mandrel table, a 0.05 mm gap is formed between the end cover and the inclined plate of the base, and the mandrel table rotates on the base in the radial direction through a bearing. The flat plate is a platform of a swirler of a workpiece to be machined, a rhombic pin hole is formed in the inclined plate mandrel table, the rhombic pin hole is coaxial with a mounting hole in the swirler of the workpiece to be machined, a protective cover and a locking nut are arranged, and the swirler of the workpiece to be machined is fixed to the top end of a mandrel of the mandrel table through the protective cover and the locking nut.

Description

Technical Field

[0001] The utility model relates to a tooling fixture for machining complex gas turbine parts by a common machining center, in particular to a tooling fixture for machining installation holes of gas turbine swirler blades. Background Art

[0002] The machining accuracy of the core components of a gas turbine has a more significant impact on thermal efficiency. The gas turbine cyclone is made of stainless steel, which is a difficult material to machine. During machining, the workpiece is prone to deformation or even movement. The structure of the gas turbine cyclone is a cone, and blade mounting holes need to be machined on the cone. The blade mounting holes are perpendicular to the cone surface and connected to the inner cavity of the cyclone.

[0003] The position accuracy of the swirler blade mounting hole directly affects the blade installation angle. When the blade installation deviates, it will affect the thermal efficiency of the entire gas turbine. Due to the large angle of the swirler blade mounting hole and the high position accuracy requirements, ordinary machine tools cannot directly process the blade mounting hole. It needs to be processed by a high-precision five-axis machine tool, which has high equipment and labor costs. Summary of the invention

[0004] In order to solve the above problems, the purpose of the utility model is to provide a processing tool for machining the installation hole of the gas turbine swirler blade by an ordinary machining center. The utility model is easy to install and has extremely high machining accuracy, which can reach an accuracy within 0.01mm.

[0005] The technical scheme of the utility model is that the processing tooling of the gas turbine swirler blade mounting hole comprises a base 1, the base 1 comprises a horizontal bottom plate and an inclined plate on the bottom plate, a tool setting plane 5 and a tool setting groove 6 are arranged on the inclined plate, which are used as a tool setting reference during processing, a bearing 4 is arranged between the central hole of the inclined plate and the mandrel table 12, the mandrel table is a mandrel sleeved on a flat plate, the central hole of the inclined plate of the base 1 is for the mandrel of the mandrel table to pass through, an end cover is arranged at the bottom end of the mandrel table 12, and is fixed to the lower bottom of the inclined plate of the base 1 through the end cover 3 and bolts 2, when the screw When the bolt 2 is tightened to fix the mandrel table 12, a gap of 0.05 mm is provided between the end cover 3 and the inclined plate of the base 1, so that the mandrel table 12 can rotate radially on the base 1 through the bearing 4; the flat plate is a platform for the cyclone of the workpiece to be processed, and a diamond pin hole is provided on the inclined plate mandrel table. The position of the diamond pin hole is coaxial with the mounting hole 15 on the cyclone 13 of the workpiece to be processed, and a protective cover 10 and a locking nut are provided. The cyclone 13 of the workpiece to be processed is fixed to the top of the mandrel of the mandrel table 12 through the protective cover 10 and the locking nut 11.

[0006] The diamond pin 8 is inserted into the diamond pin hole and the mounting hole on the workpiece cyclone 13 for positioning; the diamond pin 8 has the function of preventing over-positioning; the protective cover 10 is made of aluminum alloy to prevent the conical surface of the cyclone 13 from being crushed when tightening the locking nut 11.

[0007] A cyclone 13 is provided at one end of the mandrel table 12. The cyclone 13 is provided with a blade mounting hole 9 and an assembly hole 15. The blade mounting hole 9 is perpendicular to the conical surface of the cyclone 13 and communicates with the inner cavity of the cyclone 13. There is an angle of ten degrees between the cyclone blade mounting hole 9 and the assembly hole 15. There is a small clearance fit between the inner hole of the cyclone 13 and the mandrel table 12.

[0008] A positioning pin hole 14 is also provided. When processing the positioning pin hole 14, the mandrel table 12 is pre-fixed on the base 1, and combined processing is performed by drilling and reaming. The position and accuracy of the pin hole are controlled within 0.01 mm. The mandrel table 12 is fixed on the base 1 by two positioning bolts 7.

[0009] Beneficial effects: The utility model is a processing tool for processing the installation hole of the gas turbine swirler blade by a common processing center. The utility model has extremely high processing accuracy and can achieve an accuracy within 0.01mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is the A-direction view of the present utility model;

[0012] Figure 3 This is the B-direction view of the utility model;

[0013] Figure 4A It is a structural schematic diagram of the mandrel table; Figure 4B for Figure 4A Schematic diagram of the cross-section of the mandrel table;

[0014] Figure 5A for Figure 5B AA cross-section of the cyclone.

[0015] Figure 5B Schematic diagram of the structure of the cyclone. DETAILED DESCRIPTION

[0016] like Figure 1As shown, the processing tooling of the gas turbine swirler blade mounting hole comprises a base 1, the base 1 comprises a horizontal bottom plate and an inclined (bottom) plate fixed on the bottom plate, a tool setting plane 5 and a tool setting groove 6 are arranged on the inclined plate for tool setting reference during processing, a bearing 4 is arranged between the central hole of the inclined plate and the mandrel table 12, the mandrel table is a structure in which the mandrel is sleeved on a flat plate, the central hole provided on the inclined plate on the base 1 is for the mandrel of the mandrel table to pass through, an end cover is arranged at the bottom end of the mandrel table 12, and the end cover 3 and the bolt 2 are fixed to the lower bottom surface of the inclined plate of the base 1, when the bolt 2 is tightened to fix the mandrel table 12, a gap of 0.05 mm is arranged between the end cover 3 and the inclined plate of the base 1, so that the mandrel table 12 can be radially rotated on the base 1 through the bearing 4; the flat plate is a platform for the swirler of the workpiece to be processed, a diamond pin hole is arranged on the inclined plate mandrel table, the position of the diamond pin hole is coaxial with the mounting hole 15 on the swirler 13 of the workpiece to be processed, and a protective cover 10 and a locking nut are arranged.

[0017] It also includes a positioning pin hole 14. When processing the positioning pin hole 14, the mandrel table 12 is pre-fixed on the base 1, and combined processing is performed by drilling and reaming. The position and accuracy of the pin hole are controlled within 0.01 mm. The mandrel table 12 is fixed to the base 1 by two positioning bolts 7. A cyclone 13 is provided at one end of the mandrel table 12. The cyclone 13 is provided with a blade mounting hole 9 and an assembly hole 15. The blade mounting hole 9 is perpendicular to the conical surface of the cyclone 13 and communicates with the inner cavity of the cyclone 13. There is an angle relationship of ten degrees between the cyclone blade mounting hole 9 and the assembly hole 15. There is a very small clearance fit relationship between the inner hole of the cyclone 13 and the mandrel table 12. A diamond pin 8 is also provided on the mandrel table 12. The position of the diamond pin 8 is consistent with the mounting hole 15 on the cyclone 13. The cyclone 13 is fixed on the mandrel table 12 through a protective cover 10 and a locking nut 11, and is positioned by the diamond pin 8. The diamond pin 8 has the function of preventing over-positioning. The protective cover 10 is made of aluminum alloy to prevent the conical surface of the cyclone 13 from being crushed when the locking nut 11 is tightened.

[0018] It is fixed on the top of the mandrel of the mandrel platform 12 through a protective cover 10 and a locking nut 11.

[0019] The diamond pin 8 is inserted into the diamond pin hole and the mounting hole on the cyclone 13 of the workpiece to be processed for positioning; the diamond pin 8 has the function of preventing over-positioning; the protective cover 10 is made of aluminum alloy to prevent the conical surface of the cyclone 13 from being crushed when tightening the locking nut 11. A cyclone 13 is provided at one end of the spindle table 12, and the cyclone 13 is provided with a blade mounting hole 9 and an assembly hole 15. The blade mounting hole 9 is perpendicular to the conical surface of the cyclone 13 and communicates with the inner cavity of the cyclone 13. There is an angle relationship of ten degrees between the cyclone blade mounting hole 9 and the assembly hole 15, and there is a very small clearance fit relationship between the inner hole of the cyclone 13 and the spindle table 12;

[0020] A positioning pin hole 14 is also provided. When processing the positioning pin hole 14, the mandrel table 12 is pre-fixed on the base 1, and combined processing is performed by drilling and reaming. The position and accuracy of the pin hole are controlled within 0.01 mm. The mandrel table 12 is fixed on the base 1 by two positioning bolts 7.

[0021] The assembly and processing steps are as follows:

[0022] S1. A mandrel table 12 is provided on the base 1. A bearing 4 is provided between the base 1 and the mandrel table 12. The mandrel table 12 is fixed to the base 1 by bolts 2 and an end cover 13.

[0023] S2, the base 1 and the mandrel table 12 are all provided with positioning pin holes 14, and the mandrel table 12 is fixed to the base 1 by positioning bolts 7.

[0024] S3. A cyclone 13 is provided on the mandrel table 12 and the cyclone 13 is positioned by a diamond pin 8.

[0025] S4. The cyclone 13 is fixed on the mandrel table 12 through the protective cover 10 and the locking nut 13.

[0026] S5. The cyclone 13 is provided with a blade mounting hole 9, wherein the blade mounting hole 9 is perpendicular to the conical surface of the cyclone 13 and is connected to the inner cavity of the cyclone 13.

[0027] S6. The conical surface of the cyclone 13 and the base 1 are on the same horizontal plane.

[0028] S7. A tool setting plane 5 and a tool setting groove 6 are provided on the base 1, which are used as tool setting references when machining the blade mounting hole 9.

[0029] S8. According to the indexing function of the tooling, after processing each blade mounting hole 9, remove the two positioning bolts 7, make the mandrel table 12 radially rotate on the base 1, install the positioning bolts 7 again, and process the remaining blade mounting holes 9.

[0030] By adopting this device and processing method, the gas turbine swirler blade mounting holes can be processed more effectively and simply on an ordinary machining center. This method replaces the original high-precision five-axis equipment processing solution, greatly reducing equipment costs, labor costs and clamping time.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A processing tool for the installation hole of a gas turbine swirler blade, characterized in that: The utility model comprises a base, which comprises a horizontal bottom plate and an inclined plate on the bottom plate. A tool setting plane and a tool setting groove are arranged on the inclined plate for tool setting reference during machining. A bearing is arranged between the central hole of the inclined plate and the mandrel table. The mandrel table is a mandrel sleeved on the flat plate. The central hole of the inclined plate is for the mandrel of the mandrel table to pass through. An end cover is arranged at the bottom end of the mandrel table, which is fixed to the lower bottom of the inclined plate of the base through the end cover and bolts. When the bolts are tightened to fix the mandrel table, a gap of 0.05 mm is arranged between the end cover and the inclined plate of the base, and the mandrel table rotates radially on the base through the bearing. The flat plate is a platform for the cyclone of the workpiece to be machined. A diamond pin hole is arranged on the mandrel table of the inclined plate. The position of the diamond pin hole is coaxial with the mounting hole on the cyclone of the workpiece to be machined. A protective cover and a locking nut are arranged. The cyclone of the workpiece to be machined is fixed to the top end of the mandrel of the mandrel table through the protective cover and the locking nut.

2. The processing tool for the gas turbine swirler blade mounting hole according to claim 1 is characterized in that: A positioning pin hole is also provided to pre-fix the mandrel table to the base.

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