A five-axis machining center for gas turbine blades

Abstract

The present invention relates to the technical field of gas turbine blade processing, and more specifically, it relates to a five-axis gas turbine blade processing center, comprising a bed body composed of a bed body and a column fixedly installed on the rear side of the bed body, and a U-shaped slide fixedly installed on the top of the bed body, and a multi-axis control unit is arranged on the top of the bed body, and the multi-axis control unit includes an X-axis sliding component arranged on the bed body, and a Y-axis sliding component and a Z-axis sliding component arranged on the column, and the Z-axis sliding component is provided with a B-axis adjustment component for adjusting the rotation angle of the tool. The blade is precisely positioned by supporting the center holes of the bolster and the blade root respectively by two left and right ejectors, and the blade is fixed by supporting the center holes of the bolster and the blade root, avoiding blocking or interfering with the outer side of the bolster and the blade root, so that the outer side of the bolster and the blade root can be fully exposed during the processing process, avoiding the generation of waste, and at the same time, it is beneficial to significantly reduce the processing cost during large-scale processing.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine blade machining, and more specifically, to a five-axis machining center for gas turbine blades. Background Art

[0002] Steam turbine is a rotary power machine that converts steam energy into mechanical work and is the main equipment of steam power plant. Steam turbine is mainly composed of moving blades, stationary blades, adjustment system, heater and other components. Among them, moving blades are one of the core components of steam turbine. They are in direct contact with working fluid (such as steam or gas) and driven to rotate by its impact force, converting the energy of fluid into mechanical energy. The processing technology of moving blades is very demanding because moving blades need to work under extreme conditions and withstand high temperature, high pressure and huge stress caused by high-speed rotation.

[0003] The machining quality of moving blades (hereinafter referred to as blades) will affect the quality of the entire steam turbine, so the relative position of the workpiece and the tool must be guaranteed, the workpiece needs to be effectively positioned, and the positioning tooling needs to meet the restricted positioning requirements of six degrees of freedom. The six degrees of freedom refer to the translation of the three planes X, Y, and Z and the rotation around the three directions X, Y, and Z.

[0004] At present, the positioning fixtures of gas turbine blades generally adopt three clamping methods: 1. Use a pin to support the center hole on the bolster and the blade root; 2. Use a positioning block to clamp the outer side of the bolster and the blade root for clamping and fixing; 3. Use a pin to support the center hole on the bolster and the blade root, and cooperate with the positioning block to clamp the outer side of the bolster and the blade root for clamping and fixing.

[0005] Although the first clamping method will not block the outer side surfaces of the bolster and the blade root, there is a risk of rotational instability due to sliding between the ejector pin and the center hole during blade rotation. Although the second and third clamping methods can provide stable clamping and avoid rotational instability due to sliding between the ejector pin and the center hole during blade rotation, they will block or interfere with the outer side surfaces of the bolster and the blade root, resulting in the problem of some surfaces not being processed during the machining process. The unprocessed parts need to be cut off after the machining is completed, which generates waste and increases the material waste rate.

[0006] Secondly, the milling, polishing and other processing of gas turbine blades are currently carried out on different equipment. That is to say, after a single processing is completed, the workpiece needs to be transferred to the next processing equipment and then repositioned for further processing. The process of transfer and repositioning extends the entire processing cycle time. At the same time, multiple clamping and positioning will cause positioning errors, thereby reducing the overall processing accuracy of the blade. Summary of the invention

[0007] The present invention provides a five-axis gas turbine blade machining center, which solves the technical problems that the clamping stability of the current gas turbine blade machining center needs to be improved and waste materials are generated.

[0008] The present invention provides a five-axis machining center for gas turbine blades, comprising a bed composed of a bed and columns fixedly installed on the rear side of the bed, and a U-shaped slide fixedly installed on the top of the bed, a multi-axis control unit is arranged on the top of the bed, the multi-axis control unit comprises an X-axis sliding component arranged on the bed, and a Y-axis sliding component and a Z-axis sliding component arranged on the columns, and a B-axis adjustment component for adjusting the rotation angle of a tool is arranged on the Z-axis sliding component.

[0009] The X-axis sliding assembly includes two X-guide rails fixedly mounted on the top of the U-shaped slide and symmetrically arranged front and back, the two X-guide rails are slidably connected to the A1-axis slide 1 and the A2-axis slide 2 arranged left and right, a clamping and fastening unit for clamping blades is commonly arranged between the A1-axis slide 1 and the A2-axis slide 2, and an A-axis adjustment tooling assembly for adjusting the blade angle is arranged on the clamping and fastening unit, the Y-axis sliding assembly includes two Y-guide rails fixedly mounted on the top of the column and symmetrically mounted left and right, the tops of the two Y-guide rails are slidably connected to the Y-axis slide, and the Z-axis sliding assembly includes two Z-guide rails fixedly mounted on the front side of the Y-axis slide and symmetrically mounted left and right, and the tops of the two Z-guide rails are slidably connected to the Z-axis slide.

[0010] Furthermore, the X-axis sliding assembly also includes two X-axis bearing seats fixedly installed on the top of the U-shaped slide, and an X-axis lead screw threadedly connected to the A1-axis slide is commonly installed in the two X-axis bearing seats. An X-axis servo motor is fixedly installed on the left end of the X-axis bearing seat on the left side, and the output end of the X-axis servo motor is fixedly connected to the X-axis lead screw. A clamping drive motor is slidably installed on the top of the U-shaped slide, and a clamping drive screw threadedly connected to the A2-axis slide is fixedly installed on the output end of the clamping drive motor, and the left end of the clamping drive screw is rotatably connected to the A1-axis slide.

[0011] Furthermore, the top of the column is inclined at 45°, the Y-guide rail is fixedly installed on the inclined surface of the column, the angle between the front side of the Y-slide and the inclined surface of the column is 90°, and the Y-slide assembly also includes two Y-bearing seats fixedly installed on the inclined surface of the column, and a Y-screw threadedly connected to the Y-slide is commonly installed in the two Y-bearing seats, and a Y-servo motor is fixedly installed at the bottom of the Y-bearing seat below, and the output end of the Y-servo motor is fixedly connected to the Y-screw.

[0012] Furthermore, the Z-axis sliding assembly also includes a Z-axis bearing seat fixedly installed on the front side of the Y-axis slide, on which a Z-axis lead screw threadedly connected to the Z-axis slide is rotatably installed, and on which a Z-axis servo motor is fixedly installed, and an output end of the Z-axis servo motor is fixedly connected to the Z-axis lead screw.

[0013] Furthermore, the A-axis adjustment tooling assembly includes two A-axis torque turntables fixedly mounted on the top of A1-axis slide 1 and A2-axis slide 2 respectively, and an annular cavity is opened on the A-axis torque turntable, an A-axis servo motor is fixedly mounted on the inner wall of the annular cavity, and a turntable is fixedly mounted on the output end of the A-axis servo motor.

[0014] Furthermore, the B-axis adjustment assembly includes a notch groove opened on the Z-axis slide and a spindle box rotatably installed between the front and rear inner walls of the notch groove, and an electric spindle for fixing and driving the tool is provided at the bottom of the spindle box. A B-axis DD motor is fixedly installed on the front side of the Z-axis slide, and the output shaft of the B-axis DD motor is fixedly connected to the spindle box.

[0015] Furthermore, the clamping and fastening unit includes two clamping components that are symmetrical on the left and right, and a fastening component and a control component arranged on the right clamping component. The clamping component includes a fixed plate fixedly installed on the side where the two turntables are close to each other, and a mounting platform fixedly installed on the side where the fixed plate is away from the corresponding turntable. A pin is fixedly installed on the side where the two mounting platforms are close to each other.

[0016] Furthermore, the fastening assembly includes two groups of tracks that are symmetrical in front and back, each group of tracks includes two slide rails that are symmetrical in top and bottom, all the slide rails are slidably connected with two sliders that are symmetrical in top and bottom, and fastening plates are fixedly installed on the left sides of the two sliders, and spring telescopic rods are fixedly installed on the adjacent sides of the corresponding two fastening plates, and a circular plate is commonly installed between the fixed sections of the corresponding two spring telescopic rods.

[0017] Furthermore, the control component includes an installation groove opened on the right fixed plate and a U-shaped frame fixedly installed in the installation groove, a bidirectional lead screw is rotatably installed on the U-shaped frame, and the outer side of the bidirectional lead screw is threadedly connected to two moving blocks fixedly connected to the slide rails in the two sets of tracks respectively.

[0018] Furthermore, the control component also includes a wedge block fixedly installed on the side where the two corresponding fastening plates are close to each other, the two wedge blocks corresponding to the same slide rail are symmetrically arranged up and down and the inclined surfaces are arranged close to each other, an L-shaped rod is fixedly installed on the outer side of the circular plate, and an equilateral trapezoidal block matching with the corresponding wedge block in the other group of tracks is fixedly installed on the end of the L-shaped rod away from the corresponding circular plate, and the inclined surfaces of the wedge blocks in the two groups of tracks and the inclined surfaces of the equilateral trapezoidal blocks are both facing the center of the fixed disk.

[0019] The beneficial effects of the present invention are as follows: 1. The center holes of the bolster and the blade root are respectively supported by the left and right ejectors, thereby achieving precise clamping of the blade, thereby ensuring the stability and accuracy of the blade during processing and avoiding processing errors caused by improper clamping. At the same time, the blade is fixed by supporting the center holes of the bolster and the blade root to avoid blocking or interfering with the outer side surfaces of the bolster and the blade root, so that the outer side surfaces of the bolster and the blade root can be fully exposed during processing, avoiding the generation of waste, and at the same time facilitating a significant reduction in processing costs during large-scale processing.

[0020] 2. Through targeted design based on the shape of the blade root itself, the two moving blocks drive the slider and the fastening plate to approach each other and insert into the mountain-shaped end of the blade root to achieve internal support for the blade root. At the same time, the internal support is used to limit the rotational freedom of the blade itself to ensure that the blade remains relatively stable during the processing, and to prevent the blade from shifting and other unstable conditions due to the sliding between the ejector pin and the center hole during rotation, thereby greatly improving the stability and processing accuracy of the blade.

[0021] 3. Through the cooperation of the X-axis sliding assembly, the Y-axis sliding assembly, the Z-axis sliding assembly, the A-axis adjustment tooling assembly and the B-axis adjustment assembly, the blade processing efficiency and processing accuracy can be effectively improved, and the production cycle can be shortened. At the same time, the multi-axis control unit integrates multiple processes such as roughing, semi-finishing and finishing on the same equipment, avoiding the transfer and repositioning of workpieces between different processing equipment, greatly saving time, and avoiding positioning errors caused by multiple clamping, thereby improving the overall processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the Y-direction servo motor, Y-direction guide rail, Y-direction slide table and Y-direction lead screw of the present invention.

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the Z-direction servo motor, Z-direction guide rail, Z-direction slide table and Z-direction lead screw of the present invention.

[0025] Figure 4 It is a partial three-dimensional structural schematic diagram of the blades, rotating disk, annular groove, A-axis servo motor and A-axis torque turntable of the present invention.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the A-direction servo motor, rotating disk, fixed disk, moving block and blade part of the present invention.

[0027] Figure 6 It is a partial three-dimensional structural schematic diagram of the turntable, multi-axis control unit and clamping and fastening unit of the present invention.

[0028] Figure 7 It is a partial three-dimensional structural schematic diagram of the fastening plate, the spring telescopic rod, the equilateral trapezoidal block and the wedge-shaped block of the present invention.

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the B-direction DD motor, spindle box and electric spindle part of the present invention.

[0030] In the figure: 1, bed; 101, bed; 102, column; 2, multi-axis control unit; 3, clamping and fastening unit; 4, blade; 401, blade pillow; 402, blade body; 403, blade root; 5, U-shaped slide; 201, X-direction sliding assembly; 202, Y-direction sliding assembly; 203, Z-direction sliding assembly; 204, A-axis adjustment fixture assembly; 205, B-axis adjustment assembly; 2011, X-direction guide rail; 20 12. A1 axis slide 1; 2013. A2 axis slide 2; 2014. X-axis bearing seat; 2015. X-axis lead screw; 2016. X-axis servo motor; 2017. Clamping drive motor; 2018. Clamping drive lead screw; 2021. Y-axis guide rail; 2022. Y-axis slide; 2023. Y-axis bearing seat; 2024. Y-axis lead screw; 2025. Y-axis servo motor; 2031. Z-axis guide rail; 2 032, Z-axis slide; 2033, Z-axis bearing seat; 2034, Z-axis lead screw; 2035, Z-axis servo motor; 2041, A-axis torque turntable; 2042, annular cavity; 2043, A-axis servo motor; 2044, turntable; 2051, notch groove; 2052, spindle box; 2053, electric spindle; 2054, B-axis DD motor; 301, clamping assembly; 302, fastening assembly; 30 3. Control assembly; 3011. Fixed plate; 3012. Mounting table; 3013. Ejector pin; 3021. Slide rail; 3022. Slider; 3023. Fastening plate; 3024. Spring telescopic rod; 3025. Round plate; 3031. Mounting groove; 3032. U-shaped frame; 3033. Bidirectional lead screw; 3034. Moving block; 3035. L-shaped rod; 3036. Equilateral trapezoidal block; 3037. Wedge block. DETAILED DESCRIPTION

[0031] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0032] See also Figure 1 and Figure 2A five-axis machining center for gas turbine blades includes a bed 1 consisting of a bed 101 and a column 102 fixedly installed on the rear side of the bed 101, and a U-shaped slide 5 fixedly installed on the top of the bed 101. A multi-axis control unit 2 is arranged on the top of the bed 1. The multi-axis control unit 2 includes an X-axis sliding component 201 arranged on the bed 101, and a Y-axis sliding component 202 and a Z-axis sliding component 203 arranged on the column 102. A B-axis adjustment component 205 is arranged on the Z-axis sliding component 203.

[0033] See also Figure 1 and Figure 6 The X-axis sliding component 201 includes two X-guide rails 2011 fixedly installed on the top of the U-shaped slide 5 and symmetrical front and back, and the two X-guide rails 2011 are slidably connected with the A1-axis slide 1 2012 and the A2-axis slide 2 2013 arranged left and right. A clamping and fastening unit 3 for clamping the blade 4 is arranged between the A1-axis slide 1 2012 and the A2-axis slide 2 2013, and an A-axis adjustment tooling component 204 for adjusting the angle of the blade 4 is arranged on the clamping and fastening unit 3. The clamping and fastening unit 3 includes two clamping components 301 symmetrical on the left and right, and a fastening component 302 and a control component 303 arranged on the right clamping component 301. The A-axis adjustment tooling component 204 is used to adjust the rotation angle of the blade 4, and the B-axis adjustment component 205 is used to adjust the rotation angle of the tool.

[0034] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The X-direction sliding assembly 201 also includes two X-direction bearing seats 2014 fixedly mounted on the top of the U-shaped slide 5, and an X-direction lead screw 2015 threadedly connected to the A1-axis slide 2012 is installed in the two X-direction bearing seats 2014. An X-direction servo motor 2016 is fixedly mounted on the left end of the X-direction bearing seat 2014 on the left side, and the output end of the X-direction servo motor 2016 is fixedly connected to the X-direction lead screw 2015. A clamping drive motor 2017 is slidably mounted on the top of the U-shaped slide 5, and the clamping The output end of the driving motor 2017 is fixedly installed with a clamping driving screw 2018 threadedly connected to the A2-axis slide 2013, and the left end of the clamping driving screw 2018 is rotatably connected to the A1-axis slide 2012. The blade 4 is composed of a bolster 401, a blade body 402 and a blade root 403, and a center hole is opened on the side away from the bolster 401 and the blade root 403. The end of the blade root 403 is in a mountain shape, the blade body 402 is twisted, and its thickness gradually becomes thinner in the direction from the blade root 403 to the bolster 401.

[0035] See also Figure 1 , Figure 4 , Figure 5 and Figure 6The A-axis adjustment tooling assembly 204 includes two A-axis torque turntables 2041 respectively fixedly mounted on the top of the A1-axis slide 1 2012 and the A2-axis slide 2 2013. An annular cavity 2042 is opened on the A-axis torque turntable 2041, and an A-axis servo motor 2043 is fixedly mounted on the inner wall of the annular cavity 2042. A turntable 2044 is fixedly mounted on the output end of the A-axis servo motor 2043.

[0036] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The clamping assembly 301 includes a fixed disk 3011 fixedly installed on the side where the two turntables 2044 are close to each other, and a mounting platform 3012 fixedly installed on the side where the fixed disk 3011 is away from the corresponding turntable 2044, and a ejector pin 3013 is fixedly installed on the side where the two mounting platforms 3012 are close to each other.

[0037] During specific use, the blade 4 to be processed is first suspended between the left and right clamping assemblies 301, and then the clamping drive motor 2017 is started. The output shaft of the clamping drive motor 2017 rotates to drive the clamping drive screw 2018 to rotate, thereby driving the A2-axis slide 2013 to move to the left and close to the A1-axis slide 1 2012, and then driving the right-side A-axis torque turntable 2041 to move to the left, so that the right-side ejector pin 3013 moves to the left, so that the left and right ejector pins 3013 respectively support the center holes of the leaf pillow 401 and the leaf root 403, thereby completing the clamping of the blade 4. The blade 4 is precisely clamped by respectively supporting the center holes of the blade pillow 401 and the blade root 403 with the two left and right ejector pins 3013, thereby ensuring the stability of the blade 4 during the processing and avoiding processing errors caused by improper clamping. At the same time, the blade 4 is fixed by supporting the center holes of the blade pillow 401 and the blade root 403 to avoid blocking or interfering with the outer side surfaces of the blade pillow 401 and the blade root 403. Therefore, during the processing, the side surfaces of the blade pillow 401 and the blade root 403 can be completely exposed for processing, thereby avoiding the generation of waste and helping to reduce processing costs in large-scale processing.

[0038] After the processing is completed, first fix the blade 4, then start the clamping drive motor 2017, the output shaft of the clamping drive motor 2017 rotates to drive the clamping drive screw 2018 to rotate, so that the A2-axis slide 2013 drives the right ejector 3013 to move to the right away from the A1-axis slide 1 2012, and then the left and right clamping components 301 release the clamping of the blade 4.

[0039] See also Figure 1 , Figure 5 , Figure 6 and Figure 7The fastening assembly 302 includes two groups of tracks that are symmetrical in front and back, and each group of tracks includes two slide rails 3021 that are symmetrical in top and bottom. Two sliders 3022 that are symmetrical in top and bottom are slidably connected in all the slide rails 3021, and fastening plates 3023 are fixedly installed on the left sides of the two sliders 3022. Spring telescopic rods 3024 are fixedly installed on the adjacent sides of the corresponding two fastening plates 3023, and a circular plate 3025 is commonly installed between the fixed sections of the corresponding two spring telescopic rods 3024.

[0040] See also Figure 1 , Figure 5 , Figure 6 and Figure 7 The control component 303 includes a mounting groove 3031 opened on the right fixed plate 3011 and a U-shaped frame 3032 fixedly installed in the mounting groove 3031, and a bidirectional lead screw 3033 is rotatably installed on the U-shaped frame 3032. The outer side of the bidirectional lead screw 3033 is threadedly connected to two moving blocks 3034 that are respectively fixedly connected to the slide rails 3021 in the two sets of tracks.

[0041] See also Figure 1 , Figure 5 , Figure 6 and Figure 7 The control component 303 also includes a wedge block 3037 fixedly installed on the side close to the corresponding two fastening plates 3023. The two wedge blocks 3037 corresponding to the same slide rail 3021 are symmetrically arranged up and down and their inclined surfaces are arranged close to each other. An L-shaped rod 3035 is fixedly installed on the outer side of the circular plate 3025. An equilateral trapezoidal block 3036 that cooperates with the corresponding wedge block 3037 in the other group of tracks is fixedly installed on the end of the L-shaped rod 3035 away from the corresponding circular plate 3025. The inclined surfaces of the wedge blocks 3037 in the two groups of tracks and the inclined surfaces of the equilateral trapezoidal blocks 3036 are both facing the center of the fixed disk 3011.

[0042] In specific use, after completing the clamping of the blade 4, the operator rotates the bidirectional lead screw 3033 to drive the two moving blocks 3034 to approach each other, thereby driving the two sets of tracks to approach each other, and the front and rear arranged fastening plates 3023 approach each other and insert into the mountain-shaped end of the blade root 403. When the two oblique sides of the equilateral trapezoidal block 3036 in one set of tracks respectively contact the oblique surfaces of the corresponding two wedge blocks 3037 in the other set of tracks and continue to move, the two wedge blocks 3037 will be pushed and move away from each other, and the corresponding spring telescopic rods 3024 will be stretched synchronously, thereby driving the corresponding two fastening plates 3023 to move away from each other. Finally, the fastening plate 3023 is pressed against the inner wall of the mountain-shaped end of the blade root 403 for internal support and fastening, while limiting the relative rotational freedom of the blade 4 itself, thereby avoiding the displacement of the blade 4 during rotation due to clamping only with the ejector pin 3013, and performing targeted internal support clamping by utilizing the shape of the blade root 403 itself, so as to not only internally support and fix the mountain-shaped end of the blade 4, but also ensure that the blade 4 maintains stable rotation during the processing, and prevents the blade 4 from becoming unstable in rotation due to the relative sliding between the ejector pin 3013 and the center hole during rotation, thereby greatly improving the stability and processing accuracy of the blade 4.

[0043] After the processing is completed, the operator rotates the bidirectional screw 3033 to move the front and rear moving blocks 3034 away from each other, thereby driving the front and rear sliding blocks 3022 to move away from each other, and then making the equilateral trapezoidal block 3036 disengage from the corresponding wedge block 3037. Under the action of the rebound force of the spring telescopic rod 3024, the fastening plate 3023 is reset, so that the fastening plate 3023 releases the internal support fastening of the mountain-shaped end of the blade root 403.

[0044] See also Figure 1 , Figure 2 and Figure 3 The Y-direction sliding assembly 202 includes two Y-direction guide rails 2021 fixedly installed on the top of the column 102 and symmetrically on the left and right. The tops of the two Y-direction guide rails 2021 are slidably connected to a Y-direction slide 2022. The Z-direction sliding assembly 203 includes two Z-direction guide rails 2031 fixedly installed on the front side of the Y-direction slide 2022 and symmetrically on the left and right. The tops of the two Z-direction guide rails 2031 are slidably connected to a Z-direction slide 2032.

[0045] See also Figure 1 , Figure 2 and Figure 3The top of the column 102 is inclined at 45°, the Y-guide rail 2021 is fixedly installed on the inclined surface of the column 102, the angle between the front side of the Y-slide 2022 and the inclined surface of the column 102 is 90°, and the Y-slide assembly 202 also includes two Y-bearing seats 2023 fixedly installed on the inclined surface of the column 102, and the two Y-bearing seats 2023 are jointly installed with a Y-screw 2024 threadedly connected to the Y-slide 2022, and a Y-servo motor 2025 is fixedly installed at the bottom of the Y-bearing seat 2023 located below, and the output end of the Y-servo motor 2025 is fixedly connected to the Y-screw 2024.

[0046] See also Figure 1 , Figure 2 and Figure 3 The Z-axis sliding assembly 203 also includes a Z-axis bearing seat 2033 fixedly mounted on the front side of the Y-axis slide 2022, on which a Z-axis lead screw 2034 threadedly connected to the Z-axis slide 2032 is rotatably mounted, and a Z-axis servo motor 2035 is fixedly mounted on the Z-axis bearing seat 2033, and an output end of the Z-axis servo motor 2035 is fixedly connected to the Z-axis lead screw 2034.

[0047] See also Figure 1 , Figure 2 , Figure 3 and Figure 8 The B-axis adjustment component 205 includes a notch groove 2051 opened on the Z-axis slide 2032 and a spindle box 2052 rotatably installed between the front and rear inner walls of the notch groove 2051. An electric spindle 2053 for fixing and driving the tool is provided at the bottom of the spindle box 2052. A B-axis DD motor 2054 is fixedly installed on the front side of the Z-axis slide 2032, and the output shaft of the B-axis DD motor 2054 is fixedly connected to the spindle box 2052.

[0048] When in use, after the blade 4 is clamped and fastened, the rough milling tool is first fixedly connected to the electric spindle 2053, and then the X-direction servo motor 2016 is started, and the output shaft of the X-direction servo motor 2016 rotates to drive the X-direction lead screw 2015 to rotate, thereby driving the A1-axis slide 1 2012, the blade 4 and the A2-axis slide 2 2013, and the clamping drive motor 2017 to move synchronously, and the X-direction position of the blade 4 is adjusted. Then, the left and right A-direction servo motors 2043 are started synchronously, so that the output shaft of the A-direction servo motor 2043 rotates to drive the turntable 2044 to rotate, thereby driving the blade 4 to rotate, and the outer arc surface of the blade 4 is facing downward and the inner arc surface is facing downward. The arc surface faces upward, and then the X-axis sliding component 201, the Y-axis sliding component 202, the Z-axis sliding component 203, the A-axis adjustment tooling component 204 and the B-axis adjustment component 205 cooperate with each other to process the inner arc surface of the blade 4. During processing, first use a corn milling cutter for processing, then replace it with a ball-end milling cutter after processing, and then use the ball-end milling cutter for further processing. After the inner arc surface processing is completed, the blade 4 is rotated 180°, and the inner arc surface of the blade 4 faces downward and the outer arc surface faces upward, and the outer arc surface is processed according to the above operation (allowance needs to be reserved during processing, because there will be errors when adjusting the angle during semi-finishing and finishing, so allowance needs to be reserved). After the inner and outer arc surfaces of the blade 4 are processed, a corn milling cutter is first used for semi-finishing (since the allowance is uneven during the angle adjustment process, a corn milling cutter is used for semi-finishing), and then a ball-end milling cutter is used to chamfer the blade body 402 and the blade root 403 without leaving any allowance. Finally, a ball-end milling cutter is used to perform the final finishing of the blade body 402. The X-axis sliding component 201, the Y-axis sliding component 202, the Z-axis sliding component 203, the A-axis adjustment tooling component 204 and the B-axis adjustment component 205 cooperate with each other to effectively improve the processing efficiency and processing accuracy of the blade 4, shorten the production cycle, and at the same time, the multi-axis control unit 2 integrates multiple processes such as roughing, semi-finishing and finishing on the same equipment, avoiding the transfer and re-positioning of the workpiece between different processing equipment, greatly saving time, and avoiding positioning errors caused by multiple clamping, thereby improving the overall processing accuracy.

[0049] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A five-axis machining center for gas turbine blades, characterized in that: include: A bed (1) is composed of a bed (101) and a column (102) fixedly mounted on the rear side of the bed (101), and a U-shaped ram (5) fixedly mounted on the top of the bed (101); a multi-axis control unit (2) is arranged on the top of the bed (1); the multi-axis control unit (2) comprises an X-axis sliding component (201) arranged on the bed (101) and a Y-axis sliding component (202) and a Z-axis sliding component (203) arranged on the column (102); the Z-axis sliding component (203) is provided with a B-axis adjustment component (205) for adjusting the rotation angle of a tool; The X-direction sliding assembly (201) comprises two X-direction guide rails (2011) fixedly mounted on the top of the U-shaped slide (5) and symmetrically arranged front and back, the two X-direction guide rails (2011) being slidably connected to the A1-axis slide table 1 (2012) and the A2-axis slide table 2 (2013) arranged left and right, a clamping and fastening unit (3) for clamping the blade (4) being arranged between the A1-axis slide table 1 (2012) and the A2-axis slide table 2 (2013), an A-axis adjustment tooling assembly (204) for adjusting the angle of the blade (4) being arranged on the clamping and fastening unit (3), and the blade (4) being composed of a blade pillow (401), a blade body (402) and a blade root (403); The clamping and fastening unit (3) comprises two left-right symmetrical clamping assemblies (301) and a fastening assembly (302) and a control assembly (303) arranged on the right clamping assembly (301); the clamping assembly (301) comprises a fixing plate (3011) and a mounting table (3012) fixedly mounted on a side close to the fixing plate (3011); and ejector pins (3013) are fixedly mounted on the sides close to the two mounting tables (3012); The fastening assembly (302) comprises two groups of tracks that are symmetrical in front and back, each group of tracks comprises slide rails (3021) that are symmetrical in top and bottom, and two slide blocks (3022) that are symmetrical in top and bottom are slidably connected in all the slide rails (3021), and a fastening plate (3023) is fixedly installed on the left side of the two slide blocks (3022), and a spring telescopic rod (3024) is fixedly installed on the adjacent side of the corresponding two fastening plates (3023), and a circular plate (3025) is installed between the fixed sections of the corresponding two spring telescopic rods (3024); The control assembly (303) comprises a mounting groove (3031) provided on the right fixing plate (3011) and a U-shaped frame (3032) fixedly mounted in the mounting groove (3031); a bidirectional lead screw (3033) is rotatably mounted on the U-shaped frame (3032); and two moving blocks (3034) are respectively fixedly connected to the slide rails (3021) in the two sets of tracks and are threadedly connected to the outer side of the bidirectional lead screw (3033); The control assembly (303) further comprises a wedge block (3037) fixedly mounted on one side of the two corresponding fastening plates (3023) close to each other. The two wedge blocks (3037) corresponding to the same slide rail (3021) are symmetrically arranged up and down and their inclined surfaces are arranged close to each other. An L-shaped rod (3035) is fixedly mounted on the outer side of the circular plate (3025). An equilateral trapezoidal block (3036) matching with the corresponding wedge block (3037) in the other group of tracks is fixedly mounted on one end of the L-shaped rod (3035) away from the corresponding circular plate (3025). The inclined surfaces of the wedge blocks (3037) in the two groups of tracks and the inclined surfaces of the equilateral trapezoidal blocks (3036) are both oriented toward the center of the fixed disk (3011).

2. A five-axis machining center for gas turbine blades according to claim 1, characterized in that: The Y-direction sliding assembly (202) comprises two Y-direction guide rails (221) fixedly mounted on the top of the column (102) and symmetrically arranged on the left and right, and the tops of the two Y-direction guide rails (2021) are slidably connected to a Y-direction slide table (2022). The Z-direction sliding assembly (203) comprises two Z-direction guide rails (2031) fixedly mounted on the front side of the Y-direction slide table (222) and symmetrically arranged on the left and right, and the tops of the two Z-direction guide rails (2031) are slidably connected to a Z-direction slide table (2032).

3. A five-axis machining center for gas turbine blades according to claim 2, characterized in that: The X-direction sliding assembly (201) further comprises two X-direction bearing seats (2014) fixedly mounted on the top of the U-shaped slide (5), an X-direction lead screw (2015) threadedly connected to the A1 axis slide (2012) being mounted in the two X-direction bearing seats (2014), an X-direction servo motor (2016) being fixedly mounted on the left end of the X-direction bearing seat (2014) on the left, an output end of the X-direction servo motor (2016) being fixedly connected to the X-direction lead screw (2015), a clamping drive motor (2017) being mounted on the top of the U-shaped slide (5), a clamping drive lead screw (2018) threadedly connected to the A2 axis slide (2013) being fixedly mounted on the output end of the clamping drive motor (2017), and a left end of the clamping drive lead screw (2018) being rotationally connected to the A1 axis slide (2012).

4. A five-axis machining center for gas turbine blades according to claim 3, characterized in that: The top of the column (102) is inclined at 45°, the Y-direction guide rail (2021) is fixedly mounted on the inclined surface of the column (102), the angle between the front side of the Y-direction slide (2022) and the inclined surface of the column (102) is 90°, and the Y-direction sliding assembly (202) further comprises two Y-direction bearing seats (2023) fixedly mounted on the inclined surface of the column (102), a Y-direction lead screw (2024) threadedly connected to the Y-direction slide (2022) being mounted in the two Y-direction bearing seats (2023), a Y-direction servo motor (225) being fixedly mounted on the end surface of the Y-direction bearing seat (2023) located at the bottom, and an output end of the Y-direction servo motor (2025) being fixedly connected to the Y-direction lead screw (2024).

5. A five-axis machining center for gas turbine blades according to claim 4, characterized in that: The Z-direction sliding assembly (203) further comprises a Z-direction bearing seat (2033) fixedly mounted on the front side of the Y-direction slide (2022); a Z-direction lead screw (2034) threadedly connected to the Z-direction slide (2032) is rotatably mounted on the Z-direction bearing seat (2033); a Z-direction servo motor (2035) is fixedly mounted on the Z-direction bearing seat (2033); and an output end of the Z-direction servo motor (2035) is fixedly connected to the Z-direction lead screw (2034).

6. A five-axis machining center for gas turbine blades according to claim 1, characterized in that: The A-axis adjustment tooling assembly (204) comprises an A-axis torque turntable (2041) fixedly mounted on the top of the A1-axis slideway 1 (2012) and the A2-axis slideway 2 (2013), respectively; an annular cavity (2042) is provided on the A-axis torque turntable (2041); an A-direction servo motor (2043) is fixedly mounted on the inner wall of the annular cavity (2042); a turntable (2044) is fixedly mounted on the output end of the A-direction servo motor (2043); and a fixed disk (3011) is fixedly mounted on a side close to the turntable (2044).

7. A five-axis machining center for gas turbine blades according to claim 2, characterized in that: The B-axis adjustment component (205) comprises a notch groove (2051) provided on the Z-axis slide (2032) and a spindle box (2052) rotatably mounted between the front and rear inner walls of the notch groove (2051); an electric spindle (2053) for fixing and driving a tool is provided at the bottom of the spindle box (2052); a B-axis DD motor (2054) is fixedly mounted on the front side of the Z-axis slide (2032); and an output shaft of the B-axis DD motor (2054) is fixedly connected to the spindle box (2052).

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