Device and precision engraving machine for processing turbine rotor blades

Abstract

The present invention provides a device and a precision engraving machine for processing turbine blades, comprising: a base plate, wherein two side surfaces of the base plate are connected with a plurality of positioning blocks, and the corresponding positioning blocks are used to accommodate and position the outer side surfaces of the turbine blades; a plurality of pads are connected to the base plate, and the pads are used to support the turbine blades; a plurality of pins are connected to the base plate, and the pins are used to position the side surfaces of the turbine blades; a pressure plate, wherein the pressure plate is arranged above the turbine blades, and the pressure plate is used to press the end surfaces of the turbine blades; the device can accurately position and clamp the workpiece, and effectively avoid problems such as tool vibration, displacement or deformation during the workpiece processing; at the same time, the device also needs to be able to cooperate with the precision engraving machine to achieve high-precision and high-efficiency processing, which not only improves the processing accuracy and efficiency, but also reduces the processing cost.

Description

Technical Field

[0001] The invention relates to the technical field of antenna manufacturing, and in particular to a device and a precision engraving machine for processing turbine rotor blades. Background Art

[0002] In the field of precision manufacturing of steam turbine manufacturing, steam turbine blades are core components, and their manufacturing accuracy and quality are directly related to the overall performance, operating stability and service life of the steam turbine. In particular, the arc tooth part of the blade root has always been a technical bottleneck and challenge in the manufacturing process due to its complex structure, extremely high dimensional accuracy and surface quality requirements.

[0003] Traditional processing methods mainly rely on forming milling cutters for manual or semi-automatic operations, but this method has significant defects. On the one hand, manual or semi-automatic processing methods are difficult to ensure the consistency and stability of processing accuracy, and are prone to leaving vibration marks, scratches and other defects on the blade surface, seriously affecting the aerodynamic performance and structural strength of the blade. On the other hand, the lack of workpiece positioning and clamping technology is also a major shortcoming of traditional processing methods. The workpiece is prone to displacement or deformation during the processing process, further exacerbating the decline in processing accuracy.

[0004] With the continuous advancement of manufacturing technology, precision engraving machines have gradually emerged with their excellent high-precision and high-efficiency processing capabilities. However, it is not easy to apply precision engraving machines to the processing of arc teeth at the root of turbine blades. The shapes of turbine blades are complex and changeable, which puts extremely high demands on tooling design. How to design and manufacture special tooling that can ensure accurate positioning and clamping of the workpiece and effectively avoid problems such as tool vibration and deformation during processing has become a key factor restricting the widespread application of precision engraving machines in the field of turbine blade processing.

[0005] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above content has been disclosed before the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0006] In order to solve the above technical problems, the present invention proposes a device and a precision engraving machine for processing turbine blades. The device can accurately position and clamp the workpiece, effectively avoiding problems such as tool vibration, displacement or deformation during workpiece processing; at the same time, the device also needs to be able to cooperate with the precision engraving machine to achieve high-precision and high-efficiency processing, which not only improves processing accuracy and efficiency, but also reduces processing costs.

[0007] In order to achieve the above object, the technical solution of the present invention is as follows:

[0008] The present invention provides a device for processing a steam turbine rotor blade, comprising:

[0009] A bottom plate, wherein two side surfaces of the bottom plate are connected with a plurality of positioning blocks, and the corresponding positioning blocks are used to accommodate and position the outer side surfaces of the turbine blades;

[0010] A plurality of pads are connected to the bottom plate, and the pads are used to support the turbine blades;

[0011] A plurality of pins are connected to the bottom plate, and the pins are used to position the side surfaces of the steam turbine blades;

[0012] A pressure plate is arranged above the steam turbine blades and is used to press the end surface of the steam turbine blades.

[0013] The present invention proposes a device and a precision engraving machine for processing turbine blades. The device can accurately position and clamp the workpiece, effectively avoiding problems such as tool vibration, displacement or deformation during the workpiece processing; at the same time, the device also needs to be able to cooperate with the precision engraving machine to achieve high-precision and high-efficiency processing, which not only improves the processing accuracy and efficiency, but also reduces the processing cost.

[0014] As a preferred technical solution, it includes: a double-headed screw, which is arranged between the pads, one end of the double-headed screw is inserted into the base plate and connected to the base plate, and the other end of the double-headed screw passes through the clamping hole of the pressure plate and is connected to the nut, and the nut, the clamping hole of the pressure plate and the double-headed screw cooperate with each other to enable the pressure plate to clamp the end face of the turbine blade.

[0015] As a preferred technical solution, one end of the pin rod abuts against the side surface of the turbine blade and positions the side surface of the turbine blade, and the other end of the pin rod is inserted into the base plate and connected thereto.

[0016] As a preferred technical solution, every two correspondingly arranged pads support one of the turbine blades.

[0017] As a preferred technical solution, the positioning block is in an "L" shape.

[0018] The present invention also provides a precision engraving machine, comprising: a device for processing turbine rotor blades as described in any of the above items and a CNC precision engraving machine workbench, wherein the device for processing turbine rotor blades is arranged on the CNC precision engraving machine workbench and connected to the CNC precision engraving machine workbench.

[0019] As a preferred technical solution, the following processing steps are included:

[0020] Use a probe to measure the blank blade to obtain actual measurement data;

[0021] According to the data to be processed stored in the engraving machine, the deviation between the first surface to be processed of the blank blade and the theoretical value is determined; according to the measured data, the workpiece coordinate calibration of the tooling installed on the engraving machine is adjusted and determined;

[0022] According to the preset processing program in the precision engraving machine, the ultra-high-speed and small-allowance milling method is adopted to use the precision engraving machine to process the arc teeth at the root of the turbine blades.

[0023] As a preferred technical solution, the following steps are also included:

[0024] Using the measured value of the first surface to be processed as a reference, measure and set the tolerance range of the remaining surfaces to be processed;

[0025] If the measured value exceeds the preset tolerance range, feedback is provided, and fine-tuning can be performed on site based on the measured data, including adjusting the workpiece coordinate calibration of the tooling installed on the precision engraving machine, and then continuing the milling process.

[0026] As a preferred technical solution, the probe measurement step includes measuring the blank blade at multiple preset positions to obtain comprehensive measured data.

[0027] As a preferred technical solution, the processing parameters of the ultra-high speed small margin milling method include:

[0028] The "ultra-high speed" means that the rotation speed of the milling cutter is between 20,000 and 40,000 revolutions per minute;

[0029] The "small allowance" mentioned above means that the thickness of the material removed by the milling cutter each time is less than 0.1 mm;

[0030] The feed speed of the milling cutter is controlled between 0.01 mm and 0.1 mm per revolution, and the cutting depth of the milling cutter is controlled between 0.2 mm and 0.5 mm.

[0031] The device and engraving machine for processing steam turbine rotor blades provided by the present invention have the following beneficial effects:

[0032] 1) The present invention provides a device and a precision engraving machine for processing turbine rotor blades. The device can accurately locate and clamp the workpiece, effectively avoiding problems such as tool vibration, displacement or deformation during the workpiece processing; at the same time, the device also needs to be able to cooperate with the precision engraving machine to achieve high-precision and high-efficiency processing, which not only improves the processing accuracy and efficiency, but also reduces the processing cost;

[0033] 2) The present invention provides a device and a precision engraving machine for processing turbine blades, wherein two side surfaces of the bottom plate are connected with a plurality of positioning blocks, which are arranged correspondingly to accommodate and position the outer side surfaces of the turbine blades; through the precise matching of the positioning blocks, it can be ensured that the blade blank has the correct position and posture during the processing;

[0034] A plurality of pins are connected to the bottom plate and are used to position the sides of the turbine blades. The pins match the positioning holes or positioning surfaces on the blades, further limiting the freedom of the blades and improving the accuracy and stability of positioning.

[0035] There are multiple pads connected to the bottom plate, which are used to support the turbine blades. The design of the pads can ensure that the blades are evenly and stably supported during the processing, avoiding deformation or displacement caused by insufficient support.

[0036] The pressure plate is arranged above the turbine blades to press the end faces of the turbine blades. The pressure plate fixes the blades to the base plate by appropriate clamping force, ensuring the stability and reliability of the blades during processing. At the same time, the design of the pressure plate can also prevent vibration or displacement of the blades due to uneven force during processing.

[0037] Through precise positioning and clamping, the blades can maintain a stable state during the processing, reducing the vibration of the tool. The combined effect of the pad and the pressure plate ensures that the blades will not be displaced or deformed due to uneven force or insufficient support during the processing, reducing the vibration marks and defects on the blade surface after processing.

[0038] The design accuracy of the device matches that of the precision engraving machine, and the processing accuracy can still reach 0.02mm (the error is within 20 microns, and the accuracy can be even higher), which can ensure that high-precision requirements are met when processing on the precision engraving machine; through precise positioning and clamping, the adjustment and correction time during the processing is reduced, and the processing efficiency is improved; due to the improvement of processing accuracy and efficiency, the scrap rate and processing time are reduced, thereby reducing the processing cost.

[0039] 3) The device and precision engraving machine for processing turbine blades provided by the present invention can effectively lock the axial and longitudinal positions of the workpiece, accurately position it, and can clamp two workpieces at the same time, saving clamping time and improving production efficiency. The clamping of the workpiece is convenient, the method is simple, and it is very convenient to use, which greatly shortens the clamping time of the workpiece and improves the processing efficiency. Conventional processing methods require a forming milling cutter to implement, but the present invention can now use a precision engraving machine to implement it, reducing production costs and ensuring surface roughness and processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of a device for processing steam turbine rotor blades provided by the present invention;

[0041] Figure 2 A schematic diagram of the structure of a bottom plate in a device for processing steam turbine rotor blades provided by the present invention;

[0042] Figure 3 A schematic diagram of the structure of a cushion block in a device for processing a steam turbine rotor blade provided by the present invention;

[0043] Figure 4 A schematic diagram of the structure of a positioning block in a device for processing a steam turbine rotor blade provided by the present invention;

[0044] Figure 5 A schematic diagram of the structure of a pressure plate in a device for processing steam turbine rotor blades provided by the present invention;

[0045] Figure 6 A schematic diagram of the structure of a steam turbine blade provided by the present invention after only the arc teeth at the blade root are processed;

[0046] Figure 7 This is a schematic diagram of a finished product of a steam turbine blade after being processed by a precision engraving machine according to the present invention;

[0047] Among them, 1-bottom plate; 2-pin rod; 3-pad; 4-pressing plate; 41-pressing hole; 5-positioning block; 6-double-headed screw; 7-nut; 8-turbine blade. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] like Figure 1-5 As shown, the present invention provides a device for processing a steam turbine rotor blade, comprising:

[0050] A bottom plate 1, wherein two side surfaces of the bottom plate 1 are connected to a plurality of positioning blocks 5, and the corresponding positioning blocks 5 are used to accommodate and position the outer side surfaces of the steam turbine blade 8 blank;

[0051] A plurality of pads 3 are connected to the bottom plate 1, and the pads 3 are used to support the turbine blades 8;

[0052] A plurality of pins 2 are connected to the bottom plate 1, and the pins 2 are used to position the sides of the steam turbine blades 8;

[0053] The pressure plate 4 is arranged above the steam turbine blade 8 and is used to press the end surface of the steam turbine blade 8 .

[0054] The present invention proposes a device and a precision engraving machine for processing turbine blades. The device can accurately position and clamp the workpiece, effectively avoiding problems such as tool chattering, displacement or deformation during the workpiece processing; at the same time, the device also needs to be able to cooperate with the precision engraving machine to achieve high-precision and high-efficiency processing, which not only improves the processing accuracy and efficiency, but also reduces the processing cost.

[0055] Preferably, if Figure 1As shown, it includes: a double-headed screw 6, the double-headed screw 6 is arranged between the cushion blocks 3, one end of the double-headed screw 6 is inserted into the bottom plate 1 and connected to the bottom plate 1, the other end of the double-headed screw 6 passes through the pressing hole 41 of the pressing plate and is connected to the nut 7, the nut 7, the pressing hole 41 of the pressing plate and the double-headed screw 6 cooperate with each other to realize that the pressing plate 4 presses the end surface of the turbine blade 8;

[0056] The setting of the double-headed screw 6 enables the pressing plate 4 to be stably pressed on the end surface of the steam turbine blade 8. Since one end of the double-headed screw 6 is connected to the bottom plate 1, and the other end passes through the pressing hole 41 of the pressing plate and is connected to the nut 7, this structure ensures that when the pressing plate 4 presses the steam turbine blade 8, the position of the steam turbine blade 8 will not be offset or deformed due to the pressure of the pressing plate, so that the position accuracy of the workpiece during the processing is effectively guaranteed;

[0057] The steam turbine blade 8 can be firmly fixed on the device by the cooperation of the double-headed screw 6, the nut 7 and the clamping hole 41 of the pressing plate. This fixing method not only improves the stability of the processing, but also avoids the processing error caused by the loosening or displacement of the workpiece during the processing. At the same time, the stable processing environment also helps to extend the service life of the precision engraving machine and improve the reliability of the equipment.

[0058] The shape of the pressing hole 41 is preferably "U"-shaped.

[0059] The design of the double-headed screw 6 and the nut 7 makes the tightening and loosening operation of the pressing plate 4 simple and quick. Compared with the traditional clamping method, this structure does not require a complex clamping mechanism or additional clamping tools. The pressing plate 4 can be tightened and loosened simply by rotating the nut 7, which not only simplifies the operation process, but also improves the processing efficiency;

[0060] During the processing, the turbine blade 8 needs to withstand the cutting force from the engraving machine and other external forces. The rigidity of the turbine blade 8 can be enhanced by the pressing action of the double-headed screw 6 and the pressing plate 4, so that it can better resist the external force, thereby avoiding deformation or damage during the processing.

[0061] Preferably, if Figure 1 As shown, one end of the pin rod 2 abuts against the side of the turbine blade 8 and positions the side of the turbine blade 8, and the other end of the pin rod 2 is inserted into the bottom plate 1 and connected thereto;

[0062] One end of the pin rod 2 is designed with an outer side wall, which is tightly against and fits the side of the steam turbine blade 8, thereby achieving accurate positioning of the side of the steam turbine blade 8. This positioning method ensures the position accuracy of the steam turbine blade 8 during the processing and avoids processing errors caused by position deviation.

[0063] The other end of the pin rod 2 is inserted into the bottom plate 1 and firmly connected thereto, thus forming a stable supporting structure to fix the steam turbine blade 8 on the device. This fixing method not only enhances the stability of the steam turbine blade 8 during the processing, but also prevents the steam turbine blade 8 from being displaced or deformed under the action of cutting force or other external forces;

[0064] Through the precise positioning and fixing of the pin 2, the processing accuracy and efficiency can be greatly improved. On the one hand, the precise positioning ensures the position accuracy of the steam turbine blade 8 during the processing, thereby ensuring that the processed steam turbine blade 8 meets the design requirements; on the other hand, the stable fixing structure reduces the vibration and deformation during the processing, thereby improving the processing efficiency and product quality.

[0065] The design of the pin rod 2 also simplifies the operation process. Since the pin rod 2 can directly position and fix the turbine blade 8, no additional clamping mechanism or tool is required; this not only reduces the difficulty of operation, but also improves processing efficiency.

[0066] Preferably, if Figure 1 As shown, every two correspondingly arranged pads 3 support one steam turbine blade 8;

[0067] Every two correspondingly arranged pads 3 can ensure that the steam turbine blade 8 is supported evenly in the horizontal direction; such even support helps prevent the steam turbine blade 8 from being deformed due to uneven force during processing, thereby ensuring the integrity and processing accuracy of the steam turbine blade 8;

[0068] The support of the pad 3 provides the turbine blade 8 with additional stability during the machining process; this stability is essential for resisting the vibration and impact force generated during the cutting process, helps to ensure the smooth machining process, and reduces the defects of the turbine blade 8 caused by vibration;

[0069] The pad 3 also protects the turbine blade 8 and processing equipment; during the processing, the pad 3 can absorb part of the cutting force and vibration, thereby reducing the wear and damage to the blade and processing equipment. This helps to extend the service life of the blade and processing equipment and reduce maintenance costs.

[0070] Preferably, if Figure 1 and Figure 4As shown, the positioning block 5 is in an "L" shape; due to its unique shape design, the "L"-shaped positioning block 5 enables the workpiece to be quickly and accurately positioned at a predetermined position, which helps to reduce positioning time and improve processing efficiency; using the "L"-shaped positioning block 5 can simplify the operating process and reduce the difficulty of operation, which enables the operator to more easily complete the positioning and clamping of the workpiece, thereby improving the overall processing efficiency.

[0071] On the other hand, the present invention provides a precision engraving machine, comprising: a device for processing a turbine rotor blade as described in any one of the above items and a CNC precision engraving machine workbench, wherein the device for processing a turbine rotor blade is arranged on the CNC precision engraving machine workbench and connected to the CNC precision engraving machine workbench;

[0072] The precision engraving machine provided by the present invention realizes high-precision processing, improves processing efficiency, reduces processing costs, and enhances processing flexibility by integrating a device for processing turbine rotor blades and a precision engraving machine workbench.

[0073] Preferably, the following processing steps are included:

[0074] Use a probe to measure the blank blade to obtain actual measurement data;

[0075] According to the data to be processed stored in the engraving machine, the deviation between the first surface to be processed of the blank blade and the theoretical value is determined; according to the measured data, the workpiece coordinate calibration of the tooling installed on the engraving machine is adjusted and determined;

[0076] According to the preset processing program in the engraving machine, the ultra-high-speed and small-residue milling method is adopted to use the engraving machine to process the arc teeth at the root of the turbine blades;

[0077] This application uses a probe to measure the blank blade to obtain measured data. The purpose of this step is to obtain the actual size and shape data of the blank blade. Through the precise measurement of the probe, the initial state of the blade can be understood, including the size, shape and possible deviations of its various parts. These data provide an important reference for subsequent processing;

[0078] The present application determines the deviation between the first surface to be processed of the blank blade and the theoretical value according to the data to be processed stored in the precision engraving machine; according to the measured data, adjusts and determines the workpiece coordinate calibration of the tooling installed on the precision engraving machine, and by comparing the data to be processed stored in the precision engraving machine with the measured data measured by the probe, the deviation between the first surface to be processed of the blank blade and the theoretical value can be determined. This step helps to understand the state of the blade before processing and the amount of adjustment required; according to the measured data, the workpiece coordinate calibration of the tooling installed on the precision engraving machine is adjusted. This step ensures the position accuracy of the blade during the processing, so that subsequent processing can be carried out according to the predetermined path and parameters;

[0079] The present application uses an ultra-high-speed and small-residue milling method according to the preset processing program in the precision engraving machine, and uses the precision engraving machine to process the blade root arc teeth of the turbine blade. The precision engraving machine adopts advanced CNC system and servo drive technology, which can achieve high-precision processing. Through the preset processing program, the precision engraving machine can accurately mill the blade according to the predetermined path and parameters to ensure that the processed blade root arc teeth meet the design requirements; the ultra-high-speed and small-residue milling method can greatly improve the processing efficiency. Ultra-high-speed milling can reduce cutting force and cutting heat, reduce tool wear and workpiece deformation, thereby improving processing quality and efficiency. At the same time, small-residue processing can reduce processing time and material waste, and further reduce costs;

[0080] The machining accuracy and stability of the engraving machine ensure that the processed blade root arc teeth have high precision and high surface quality, which helps to improve the working efficiency and performance of the steam turbine and extend its service life;

[0081] The precision engraving machine has powerful programming and simulation functions, and can quickly generate and optimize processing programs according to different blade shapes and processing requirements. This enables the precision engraving machine to flexibly respond to various processing needs and improve the flexibility and adaptability of processing.

[0082] Preferably, the method further comprises the following steps:

[0083] Using the measured value of the first surface to be processed as a reference, measure and set the tolerance range of the remaining surfaces to be processed;

[0084] If the measured value exceeds the preset tolerance range, feedback is provided, and fine-tuning is allowed on site based on the measured data, including adjusting the workpiece coordinate calibration of the tooling installed on the precision engraving machine, and then continuing the milling process;

[0085] In the machining process of turbine blades, using the measured value of the first surface to be machined as a benchmark to measure and set the tolerance range of the remaining surfaces to be machined, and providing feedback and allowing on-site fine-tuning when the measured value exceeds the preset tolerance range, this series of steps plays a crucial role.

[0086] Specifically, the roles of these steps can be summarized as follows:

[0087] Using the measured values ​​of the first surface to be machined as a benchmark ensures that subsequent machined surfaces have an accurate reference standard; this helps reduce error accumulation during the machining process and improves overall machining accuracy.

[0088] Setting the tolerance range of the remaining surfaces to be processed according to the measured value of the reference surface can ensure that each processed surface meets the design requirements. Setting the tolerance range helps control the variation in the processing process and improve the stability and consistency of the processing quality.

[0089] When the measured value exceeds the preset tolerance range, the system can provide timely feedback, which helps to promptly discover problems in the processing process; the feedback mechanism can prompt operators to take quick measures to make adjustments to avoid the problem from escalating, thereby improving processing efficiency; it allows on-site fine-tuning based on actual measured data, including adjusting the workpiece coordinate calibration of the tooling installed on the precision engraving machine, which can ensure the flexibility and adaptability of the processing process; on-site fine-tuning can quickly respond to changes in the processing process, reduce downtime and resource waste, and further improve processing efficiency.

[0090] Through strict tolerance control and on-site fine-tuning, rework and scrap caused by processing errors can be reduced, which helps to reduce production costs and improve overall economic benefits. Precise processing and tolerance control can optimize material utilization and reduce material waste, which helps to reduce raw material costs and improve the economy of the processing process.

[0091] Collecting and analyzing measured data during the processing helps to discover potential problems and improvement points in the processing process, which provides data support for continuous improvement and innovation;

[0092] Based on the measured data and feedback results, the machining process can be optimized and upgraded, which helps to improve machining quality, efficiency and cost-effectiveness.

[0093] In summary, using the measured value of the first surface to be machined as a benchmark to measure and set the tolerance range of the remaining surfaces to be machined, and providing feedback and allowing on-site fine-tuning when the measured value exceeds the preset tolerance range, this series of steps plays a vital role in the machining process of turbine blades. These steps not only ensure machining accuracy and quality control, but also improve the flexibility and efficiency of the machining process, reduce production costs and scrap rates, and promote continuous improvement and innovation.

[0094] Preferably, the probe measurement step includes measuring the blank blade at a plurality of preset positions to obtain comprehensive measured data;

[0095] Through comprehensive measurement, the errors of the blades before processing can be discovered and corrected in time, which helps to reduce the accumulation of errors during the processing and improve the overall processing accuracy; the probe measurement step includes measuring the blank blades at multiple preset positions to obtain comprehensive measured data.

[0096] Preferably, the processing parameters of the ultra-high speed and small margin milling method include:

[0097] The "ultra-high speed" means that the rotation speed of the milling cutter is between 20,000 and 40,000 revolutions per minute;

[0098] The "small allowance" mentioned above means that the thickness of the material removed by the milling cutter each time is less than 0.1 mm;

[0099] The feed speed of the milling cutter is controlled between 0.01 mm and 0.1 mm per revolution, and the cutting depth of the milling cutter is controlled between 0.2 mm and 0.5 mm.

[0100] The rotation speed of the milling cutter is between 20,000 and 40,000 revolutions per minute, which is much higher than the conventional milling speed. This increases the number of contacts between the tool and the workpiece per unit time, significantly improving cutting efficiency.

[0101] Small excess cutting, the material thickness removed in each cutting is less than 0.1mm, which means the burden of each cutting is small; this helps to reduce the energy consumption and cutting force in the cutting process, making the cutting process easier and more efficient;

[0102] Reasonable feed speed and cutting depth, the feed speed is controlled between 0.01mm and 0.1mm per revolution, and the cutting depth is controlled between 0.2mm and 0.5mm; such parameter settings can achieve faster cutting speed while ensuring processing quality, thereby improving processing efficiency.

[0103] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all various changes or equivalent substitutions falling within the scope of the claims of the present application are included. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope protected by the present invention.

Claims

1. A device for processing steam turbine rotor blades, characterized in that: include: A bottom plate, wherein two side surfaces of the bottom plate are connected with a plurality of positioning blocks, and the corresponding positioning blocks are used to accommodate and position the outer side surfaces of the turbine blades; A plurality of pads are connected to the bottom plate, and the pads are used to support the turbine blades; A plurality of pins are connected to the bottom plate, and the pins are used to position the side surfaces of the steam turbine blades; A pressure plate is arranged above the steam turbine blades and is used to press the end surface of the steam turbine blades.

2. The device for processing steam turbine rotor blades according to claim 1, characterized in that: include: A double-headed screw, wherein the double-headed screw is arranged between the pads, one end of the double-headed screw is inserted into the base plate and connected to the base plate, and the other end of the double-headed screw passes through the clamping hole of the pressure plate and is connected to the nut, and the nut, the clamping hole of the pressure plate and the double-headed screw cooperate with each other to enable the pressure plate to clamp the end face of the turbine blade.

3. The device for processing steam turbine rotor blades according to claim 1, characterized in that: One end of the pin rod abuts against the side surface of the turbine blade and positions the side surface of the turbine blade, and the other end of the pin rod is inserted into the bottom plate and connected thereto.

4. The device for processing steam turbine rotor blades according to claim 1, characterized in that: Every two of the pads that are arranged correspondingly support one of the steam turbine blades.

5. The device for processing steam turbine rotor blades according to claim 1, characterized in that: The positioning block is in an "L" shape.

6. A precision engraving machine, characterized in that: include: According to any one of claims 1 to 5, the device for processing steam turbine rotor blades and the CNC engraving machine workbench are arranged on the CNC engraving machine workbench and connected to the CNC engraving machine workbench.

7. The engraving machine according to claim 6, characterized in that: The processing steps include: Use a probe to measure the blank blade to obtain actual measurement data; According to the data to be processed stored in the engraving machine, the deviation between the first surface to be processed of the blank blade and the theoretical value is determined; according to the measured data, the workpiece coordinate calibration of the tooling installed on the engraving machine is adjusted and determined; According to the preset processing program in the precision engraving machine, the ultra-high-speed and small-allowance milling method is adopted to use the precision engraving machine to process the arc teeth at the root of the turbine blades.

8. The engraving machine according to claim 7, characterized in that: The following steps are also included: Using the measured value of the first surface to be processed as a reference, measure and set the tolerance range of the remaining surfaces to be processed; If the measured value exceeds the preset tolerance range, feedback is provided, and fine-tuning can be performed on site based on the measured data, including adjusting the workpiece coordinate calibration of the tooling installed on the precision engraving machine, and then continuing the milling process.

9. The engraving machine according to claim 7, characterized in that: The probe measurement step includes: measuring the blank blade at multiple preset positions to obtain comprehensive measured data.

10. The engraving machine according to claim 7, characterized in that: The processing parameters of the ultra-high speed and small margin milling method include: The "ultra-high speed" means that the rotation speed of the milling cutter is between 20,000 and 40,000 revolutions per minute; The "small margin" mentioned above means that the thickness of the material removed by the milling cutter each time is less than 0.1 mm; The feed speed of the milling cutter is controlled between 0.01 mm and 0.1 mm per revolution, and the cutting depth of the milling cutter is controlled between 0.2 mm and 0.5 mm.

Images