Efficient turning numerical control machining method for nickel-based superalloy turbine disc

Abstract

The invention aims to provide an efficient turning numerical control machining method for a nickel-based superalloy turbine disc, and belongs to the field of turning machining. The method comprises the steps of planning an optimal feeding path of a machining area, setting a machining sequence to control stress deformation of parts, selecting a proper machining cutter bar and a blade, setting three machining element parameters, modeling by utilizing UG software, compiling a numerical control machining program, and formulating a machining cutter table. Cutter path information is converted into a G code machining numerical control program through UG software post-processing, NCSIMUL software is used for conducting three-dimensional analog simulation on the machining numerical control program, and after it is determined that the cutter is free of interference, the cutter is applied to field actual machining. The machining and cutting difficulty of the nickel-based high-temperature alloy turbine disc is effectively reduced, the problems that in the part machining process, stress deformation is caused, the thickness of the top of the air seal tooth is very thin, deformation is prone to occurring, the requirement for the machining precision of the mounting edge is high, and deformation and out-of-tolerance are prone to occurring are solved, and efficient, accurate and stable turning numerical control machining of the nickel-based high-temperature alloy turbine disc is achieved.

Description

Technical Field

[0001] The present invention relates to a turning method, in particular to a turbine disk turning method. Background Art

[0002] In the field of gas turbines, turbine discs are key components of gas turbine compressors. The machining accuracy requirements for turbine discs are extremely high, and high-precision CNC equipment and tools are required to achieve this. Its structure is complex, containing multiple elements and difficult-to-machine parts, and it is necessary to formulate reasonable machining processes and tool paths. Turbine discs are usually made of high-strength and high-hardness materials, which have higher requirements for tool wear and the setting of machining parameters. Its machining quality and the advancement of process technology directly affect the overall performance and reliability of gas turbine equipment. With the development of the manufacturing industry, CNC machining technology has gradually become the mainstream technology for gas turbine turbine disc machining due to its advantages of high precision, high efficiency and high flexibility. The use of CNC lathes can accurately control the running trajectory and feed speed of the tool, and realize the precise machining of the complex shapes of the inner and outer contours of the turbine disc and the difficult-to-machine parts of the comb teeth. During the machining process, special attention should be paid to the selection and wear of the tool, as well as the reasonable setting of the machining parameters to ensure the machining accuracy and surface quality, so as to meet the strict requirements of the turbine disc for machining accuracy. Summary of the invention

[0003] The object of the present invention is to provide a high-efficiency CNC turning machining method for a nickel-based high-temperature alloy turbine disk, which can realize efficient, accurate and stable CNC turning machining.

[0004] The object of the present invention is achieved in that:

[0005] The invention discloses a high-efficiency CNC turning method for a nickel-based high-temperature alloy turbine disk, which is characterized by comprising the following steps:

[0006] (1) Plan the cutting areas for rough machining, semi-finishing, and finishing, and design the optimal cutting path;

[0007] (2) Set the sequence of rough machining, radius machining, fine machining, turning of air seal teeth, and fine turning of mounting edges to control the stress and deformation of parts. First, rough cut the areas with large allowances, easy machining, and not easy to deform. Then, process the areas with small allowances, difficult machining, unstable dimensions, and requiring fine machining. Finally, process the dimensions that are afraid of being scratched, dented, have fine dimensions, and have a small tolerance range.

[0008] (3) Select the machining tool bar and blade;

[0009] (4) Set the three processing parameters;

[0010] (5) Use UG software to model and compile NC machining programs: According to the machining process drawings, use UG to create the blank process model, rough machining process model, semi-finishing process model, finishing process model, gas seal gear turning process model, and fine turning installation edge process model in sequence. According to the process models, create feature groups of machining processes, create machining tools and machining parameters, establish a workpiece coordinate system, create geometric bodies in the coordinate system of the machining process, and design the machining method in the machining process; compile NC programs, select machining methods and machining tools according to the machining characteristics and machining area of ​​the workpiece, and set the cutting speed, cutting depth, feed rate, allowance, feed, and retract during machining; after all program parameters are set, use the tool path editor in the UG module to uniformly change the feed point and retract point of each tool to Z600mm;

[0011] (6) Prepare a machining tool table, which shall indicate the component number, part name, process number, process name, equipment model, equipment name, material brand, material hardness, model, version, and program number, and shall be accompanied by a CAD schematic diagram of the process model of the current machining process, and shall indicate the coordinate system direction and the reference tool point position, and shall be accompanied by a CAD schematic diagram of the tool model, and shall indicate the tool setting point direction, and shall set the tool code, tool number, tool compensation number, tool body and blade model, and material number in sequence;

[0012] (7) Use UG software post-processing to convert the tool path information into a G-code processing NC program. Import the on-site processing machine tool 3D model, tool model, workpiece process model, tooling model, and G-code processing NC program into the NCSIMUL software. Use NCSIMUL software to perform 3D simulation of the processing NC program. After confirming that there is no interference between the tools, apply it to actual on-site processing.

[0013] The present invention may also include:

[0014] 1. Step (1) is specifically:

[0015] a. Name the two surfaces of the nickel-based high-temperature alloy turbine disk as surface A and surface B, and rough-process surface A and surface B: according to the blank drawing and the rough-processing process drawing, the cutting area to be processed is divided into three layers with a 5mm margin, and processed layer by layer in sequence. After processing the first layer, a margin of 1.5mm is left, and a margin of 0.5mm is left for processing the second layer. The third layer is processed in 2 even passes to remove all the margins;

[0016] b. Semi-finishing of surface A and surface B: According to the roughing process diagram and semi-finishing process diagram, the cutting area to be processed is divided into two layers with a 1mm margin, and processed layer by layer in sequence. After processing the first layer, a margin of 0.5mm is left. The second layer is processed in 2 even passes to remove all the margins;

[0017] c. Finishing of surface A and surface B: According to the semi-finishing process diagram and the finishing process diagram, the cutting area to be processed is left with a 0.5mm allowance, and the tool is evenly passed in 2 times to remove all the allowance.

[0018] 2. Step (2) is specifically:

[0019] (i) After the rough machining of the parts is completed, the parts are placed at room temperature for 36-48 hours;

[0020] (ii) Set the semi-finishing cutting area to two cutting layers for machining, leaving a 0.5 mm margin after machining the first cutting layer, then release the pressing plate that clamps the part, let the part be in a free state and place it on the machine for at least 4 hours, re-align the workpiece runout within 0.01, and use the pressing plate to clamp the part;

[0021] (iii) During fine machining, the reference surface is first machined, and the reference surface is cut in two layers, with a single cutting depth of 0.25 mm. The cutting tool is cut with the reference surface, and the installation edge is machined in three layers, with a single cutting depth of 0.1 mm and a 0.2 mm allowance. Then the inner hole, outer diameter, auxiliary plate surface, and groove parts are fine machined in two layers, with a single cutting depth of 0.25 mm. Finally, the installation edge is machined in two layers, with a single cutting depth of 0.1 mm.

[0022] (iv) When turning the air seal teeth, use a straight groove cutter to process the air seal teeth. First, use CNC alternating slotting and then unidirectional linear progressive processing method layer by layer. According to the arrangement order of the teeth from top to bottom of the spur comb teeth, use a right-angle groove cutter to process the inner cutting area of ​​the spur teeth one by one using CNC alternating slotting method, leaving an allowance of 0.2mm, then fine turn the outer diameter of the spur teeth, leaving an allowance of 0.1mm from top to bottom, and then remove all the allowances, and then perform unidirectional linear cutting layer by layer in sequence. At the cutting layer area, move the tool along the inner wall surfaces on both sides of the spur teeth, and connect the tool at R at the bottom of the tooth. After the cutting layer area is processed, leave an allowance of 0.1mm; then process the remaining cutting layer areas according to the above method to remove all the allowances until all the spur comb teeth are processed.

[0023] 3. The setting of the three processing element parameters in step (4) includes:

[0024] During rough machining: cutting speed Vc = 25m / min, cutting depth ap = 1-1.5mm, feed rate f = 0.25mm / r, surface roughness Ra1.6;

[0025] During semi-finishing: cutting speed Vc = 28m / min, cutting depth ap = 0.5mm, feed rate f = 0.2mm / r, surface roughness Ra1.6;

[0026] During finishing: cutting speed Vc = 30m / min, cutting depth ap = 0.25mm, feed rate f = 0.15mm / r, surface roughness Ra1.6;

[0027] When turning air-sealed teeth: cutting speed Vc = 30m / min, cutting depth ap = 0.1mm, feed rate f = 0.12mm / r, surface roughness Ra1.6;

[0028] When finishing the mounting edge: cutting speed Vc=32m / min, cutting depth ap=0.05mm, feed rate f=0.1mm / r, surface roughness is Ra0.8.

[0029] 4. Step (1) The tool path for rough machining of surface A and surface B: At the inner hole and outer diameter, axial cutting is used, and the tool is cut in layers from top to bottom; the contour end face and auxiliary plate surface are cut in radial direction, and the tool is cut back and forth along the end face contour from the outside to the center; at the groove at the lower part of the installation edge, CNC alternating slotting is used first, followed by a one-way linear progressive machining method layer by layer, and then the tool is cut in layers along the inner wall surfaces on both sides, and the tool is connected at R at the bottom of the groove.

[0030] 5. Step (1) The tool path for semi-finishing surface A and surface B: At the inner hole and outer diameter, axial cutting is used, and the tool is cut in a single direction from top to bottom; the contour end face and auxiliary plate surface are cut in a radial direction, and the tool is cut in a single direction from the outside to the center along the end face contour; at the groove at the bottom of the installation edge, the tool is cut in a single direction along the inner wall on both sides, and the tool is connected at R at the bottom of the groove.

[0031] 6. Step (1) Tool path for finishing surface A and surface B: For the inner hole and outer diameter, axial cutting is used, with progressive one-way cutting from top to bottom; for the contour end face and auxiliary plate surface, radial cutting is used, with progressive one-way cutting from the outside to the center along the end face contour; for the groove at the bottom of the installation edge, progressive cutting is used along the inner wall surfaces on both sides, and the tool is connected at R at the bottom of the groove.

[0032] The advantages of the present invention are: the present invention plans the optimal tool path of the processing area, sets the processing sequence to control the stress and deformation of the parts, selects suitable processing tool bars and blades, sets accurate processing three-element parameters, uses UG software to model and compile CNC processing programs, formulates processing tool tables, uses UG software post-processing to convert tool path information into G code processing CNC programs, and uses NCSIMUL software to perform three-dimensional simulation of processing CNC programs and other CNC processing technologies. Roughing, semi-finishing, and finishing plan different processing routes, select tool bars and blades suitable for processing allowances, set different cutting speeds, feed rates and cutting depths, establish different accurate models and compile CNC programs, effectively reducing the difficulty of machining and cutting of nickel-based high-temperature alloy turbine disks, solving the problems of stress deformation during part processing, thin thickness of the top of the gas seal teeth, and easy deformation and over-tolerance at the installation edge due to high processing accuracy requirements, and realizing efficient, accurate and stable turning CNC processing of nickel-based high-temperature alloy turbine disks. Improve product quality, all products produced and processed are qualified, reduce processing costs, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The schematic diagram of the structure and clamping of the nickel-based high-temperature alloy turbine disk;

[0034] Figure 2 The schematic diagram of the machining area and cutting path of the nickel-based high-temperature alloy turbine disk;

[0035] Figure 3 It is a schematic diagram of the tool path trajectory for machining NC programs;

[0036] Figure 4 Create a process 3D model schematic for UG. DETAILED DESCRIPTION

[0037] The present invention is described in more detail below with reference to the accompanying drawings:

[0038] Combination Figure 1-4 The present invention is a high-efficiency CNC turning method for nickel-based high-temperature alloy turbine disks, combined with Figure 1 This is a schematic diagram of the structure and clamping of a nickel-based high-temperature alloy turbine disk. The parts are clamped and aligned before processing. A custom-designed lathe turbine disk turning fixture is used to locate the outer end face. The special-shaped clamping jaws clamp the right side of the outer diameter of the lower end face. A custom-made jack is used to support the lower end face of the inner hole to prevent stress deformation during processing and sinking of the end face at the center of the workpiece. Align the reference diameter and end face.

[0039] Combination Figure 2This is a schematic diagram of the processing area of ​​the nickel-based high-temperature alloy turbine disk. According to the cutting performance and difficulty of nickel-based high-temperature alloy, stress deformation during part processing, the thin top thickness of the gas seal teeth, and the high processing accuracy requirements at the installation edge, which is easy to deform and exceed the tolerance, the processing path and CNC process processing method are designed. It is divided into rough processing with allowance, semi-finishing, and then finishing to remove all allowances except the gas seal teeth and the installation edge, and then turn the gas seal teeth and finish the installation edge. It includes the following steps:

[0040] Step 1: Plan the cutting areas for rough machining, semi-finishing, finishing, turning the air seal gear, and finishing the mounting edge, and design the optimal tool path.

[0041] (1) Rough machining of surface A and surface B: According to the rough drawing and rough machining process drawing, the 5mm allowance of the cutting area to be machined is divided into three layers and machined layer by layer. After machining the first layer, a 1.5mm allowance is left, and a 0.5mm allowance is left after machining the second layer. The third layer is machined in two even passes to remove all the allowances. The designed tool path adopts axial cutting for the inner hole and outer diameter, and the tool is passed from top to bottom. The contour end face and auxiliary plate surface are machined by radial cutting, and the tool is reciprocated along the end face contour from the outside to the center. At the groove at the bottom of the installation edge, CNC alternating slotting is used first, followed by a one-way linear progressive machining method layer by layer, and then the tool is passed along the inner wall surface on both sides, and the tool is connected at R at the bottom of the groove.

[0042] (2) Semi-finishing of surface A and surface B: According to the roughing process diagram and semi-finishing process diagram, the cutting area to be processed is divided into two layers with a 1mm allowance, and processed layer by layer. After processing the first layer, a 0.5mm allowance is left. The second layer is processed in 2 even passes to remove all the allowance. The designed tool path adopts axial cutting for the inner hole and outer diameter, and performs a layer-by-layer one-way pass from top to bottom. The contour end face and auxiliary plate surface are radially cut, and a layer-by-layer one-way pass is performed from the outside to the center along the end face contour. At the groove at the bottom of the installation edge, the tool is then passed along the inner wall on both sides in a layer-by-layer manner, and the tool is connected at R at the bottom of the groove.

[0043] (3) Finishing of surface A and surface B: According to the semi-finishing process diagram and the finishing process diagram, the cutting area to be processed has a 0.5mm allowance, and the tool is evenly cut in 2 times to remove all the allowance. Design the tool path, and use axial cutting for the inner hole and outer diameter, and perform a one-way step-by-step cutting from top to bottom. For the contour end face and auxiliary plate surface, radial cutting is used, and a one-way step-by-step cutting is performed from the outside to the center along the end face contour. At the groove at the bottom of the installation edge, the tool is cut along the inner wall surface on both sides in a step-by-step manner, and the tool is connected at R at the bottom of the groove.

[0044] (4) Turning of air seal teeth: An allowance is left at the air seal teeth. The workpiece is processed after fine machining. According to the machining process diagram, the area to be processed is divided into three layers and processed layer by layer. The first layer is processed by CNC alternating slotting method with an allowance of 0.2mm. Then, the second layer is processed by unidirectional linear cutting layer by layer, leaving an allowance of 0.1mm. The third layer is processed to remove all the allowance.

[0045] (5) Finishing the installation edge: The installation edge has precise dimensions and high processing finish requirements. Finally, after all dimensions are processed, a 0.2mm margin is left at the installation edge. The cutting is performed in multiple times, and measurements and adjustments are made while processing until the dimensions are completed.

[0046] Step 2: Set the sequence of rough machining, radius machining, fine machining, gas seal gear turning, and fine machining of the installation edge stages to control the stress and deformation of the parts. First, roughly cut the areas with large allowances, easy machining, and not easy to deform. Then, process the areas with small allowances, difficult machining, unstable dimensions, and requiring fine machining. Finally, process the dimensions that are afraid of bumps and bruises, have precise dimensions, and have a small tolerance range.

[0047] (1) After the rough machining of the parts is completed, place the parts at room temperature for 36-48 hours to fully release the stress generated during the machining process, reduce stress deformation, control the deformation coefficient, and control the deformation of the parts.

[0048] (2) Set the semi-finishing cutting area into two cutting layers for processing. After processing the first cutting layer, leave a 0.5mm margin, then loosen the pressing plate that presses the part, let the part be in a free state and place it on the machine for at least 4 hours. After the stress is fully released, realign the workpiece runout within 0.01, and use the pressing plate to press the part to reduce the deformation of the part during the subsequent processing of the second cutting layer.

[0049] (3) During fine machining, first machine the reference surface, cut the reference surface in two layers, and cut to a depth of 0.25 mm each time. Use the reference surface as the cutting tool, machine the mounting edge in three layers, and cut to a depth of 0.1 mm each time, leaving a 0.2 mm allowance. Fine machine the inner hole, outer diameter, auxiliary plate surface, and groove in two layers, and cut to a depth of 0.25 mm each time. Finally, machine the mounting edge in two layers, and cut to a depth of 0.1 mm each time.

[0050] (4) When turning the air seal teeth, use a straight groove cutter to process the air seal teeth. First, use CNC alternating slotting and then unidirectional linear progressive processing method layer by layer. According to the arrangement order of the teeth from top to bottom of the straight tooth comb teeth, use a right angle groove cutter to process the internal cutting area of ​​the straight teeth one by one using CNC alternating slotting method, leaving a margin of 0.2mm, and then fine turn the outer diameter of the straight teeth, leaving a margin of 0.1mm from top to bottom, and then remove all the margins, and then perform unidirectional linear cutting layer by layer in sequence. In the cutting layer area, move the tool along the inner wall surface on both sides of the straight teeth, and connect the tool at the R of the bottom of the tooth. After the cutting layer area is completed, leave a margin of 0.1mm. Then process the remaining cutting layer area according to the above method, and remove all the margins until all the straight tooth comb teeth are processed. This processing sequence and processing method are effective in controlling the deformation or processing until the top of the straight tooth is broken due to its thin thickness, reducing the generation of burrs on the tooth tip.

[0051] Step 3: Select the appropriate tool bar and blade. For all tool selections, according to the processing conditions, give priority to tools with C6 interface, which is convenient for operators to quickly, accurately and conveniently change tools. The C6 tool bar has stable tool clamping and stronger processing resistance.

[0052] (1) During rough machining, the rough turning tool needs to withstand a large cutting force during the machining process, so the rake angle should be relatively small. A rake angle of about 5 degrees is more appropriate, and the R of the blade is larger, which can ensure better wear resistance and cutting efficiency and improve the service life of the tool. For example: choose SRSCL3225P12JET eccentric shank, RCMT1204M0-F1, CP500 round R6 blade, etc.

[0053] (2) During finishing, the finishing tool is used for high-precision surface processing. It is necessary to ensure the tool life and the quality of the machined surface. The rake angle should be relatively large, which can improve the finish and precision of the machined surface and ensure the tool life. For example: choose the non-standard tool holder of C6 EX C6X100 / C6 DDJNR-45065-15, and choose the 55-degree diamond R0.8 blade of DNMG 150608-M3MIC806.

[0054] Combination Figure 3 It is a schematic diagram of the tool path trajectory of the CNC program and Figure 4 The process is to create a three-dimensional model schematic diagram using UG, and use UG software to model and compile a CNC machining program. It is characterized by including the following steps:

[0055] Step 4: Set precise parameters of the three processing elements.

[0056] (1) During rough machining: cutting speed Vc = 25m / min, cutting depth ap = 1-1.5mm, feed rate f = 0.25mm / r, surface roughness Ra1.6.

[0057] (2) During semi-finishing: cutting speed Vc = 28m / min, cutting depth ap = 0.5mm, feed rate f = 0.2mm / r, surface roughness is Ra1.6.

[0058] (3) During finishing: cutting speed Vc = 30 m / min, cutting depth ap = 0.25 mm, feed rate f = 0.15 mm / r, surface roughness Ra1.6.

[0059] (4) When turning air-sealed teeth: cutting speed Vc = 30 m / min, cutting depth ap = 0.1 mm, feed rate f = 0.12 mm / r, surface roughness Ra1.6.

[0060] (5) When finishing the mounting edge: cutting speed Vc = 32 m / min, cutting depth ap = 0.05 mm, feed rate f = 0.1 mm / r, surface roughness Ra0.8.

[0061] Step 5: Use UG software to model and compile CNC machining programs. According to the machining process drawings, use UG to create the blank process model, rough machining process model, semi-finishing process model, finishing process model, gas seal gear turning process model, and finishing installation edge process model in sequence. According to the process model, create feature groups for the machining process, create machining tools and machining parameters, establish a workpiece coordinate system, create geometric bodies in the coordinate system of the machining process, and design the machining method in the machining process. Compile CNC programs, select machining methods and machining tools according to the machining characteristics and machining area of ​​the workpiece, and set the cutting speed, cutting depth, feed rate, allowance, feed, and retract during machining. After all program parameters are set, use the tool path editor in the UG module to uniformly change the feed point and retract point of each tool to Z600mm, so that the operator can control the tool path and prevent tool collision during machining.

[0062] Step 6: Prepare a machining tool table. The tool table should indicate the component number, part name, process number, process name, equipment model, equipment name, material brand, material hardness, model, edition, and program number. Attach a CAD schematic diagram of the current machining process model and indicate the coordinate system direction and reference tool point position. Attach a CAD schematic diagram of the tool model and indicate the tool setting point direction. Write the tool code, tool number, tool compensation number, tool body and blade model, material number, precautions, etc. in sequence.

[0063] Step 7: Use UG software post-processing to convert the tool path information into G-code processing NC program, import the on-site processing machine tool 3D model, tool model, processing workpiece process model, tooling model, G-code processing NC program into NCSIMUL software, use NCSIMUL software to perform 3D simulation of the processing NC program, and apply it to actual on-site processing after confirming that there is no interference between the tools.

[0064] During the implementation of the efficient CNC turning machining of the nickel-based high-temperature alloy turbine disk of the present invention, by using CNC machining technologies such as machining route design, machining tool optimization, rational setting of machining parameters, and machining path simulation optimization, the characteristics of nickel-based high-temperature alloy turbine disk machining such as difficult cutting, easy deformation, and precision dimensional out-of-tolerance are effectively reduced, and efficient, precise and stable CNC turning machining of nickel-based high-temperature alloy turbine disk is achieved. The surface dimensions, form and position tolerances, and surface roughness quality are all qualified, the machining cost is reduced, and the production efficiency is improved.

Claims

1. A high-efficiency CNC turning method for a nickel-based high-temperature alloy turbine disk, characterized by: The steps include: (1) Plan the cutting areas for rough machining, semi-finishing, and finishing, and design the optimal tool path; (2) Set the sequence of rough machining, radius machining, fine machining, turning of air seal teeth, and fine turning of mounting edges to control the stress and deformation of parts. First, rough cut the areas with large allowances, easy machining, and not easy to deform. Then, process the areas with small allowances, difficult machining, unstable dimensions, and requiring fine machining. Finally, process the dimensions that are afraid of being scratched, dented, have fine dimensions, and have a small tolerance range. (3) Select the machining tool bar and blade; (4) Setting the three processing parameters; (5) Use UG software to model and compile NC machining programs: According to the machining process drawings, use UG to create the blank process model, rough machining process model, semi-finishing process model, finishing process model, gas seal gear turning process model, and fine turning installation edge process model in sequence. According to the process models, create feature groups of machining processes, create machining tools and machining parameters, establish a workpiece coordinate system, create geometric bodies in the coordinate system of the machining process, and design the machining method in the machining process; compile NC programs, select machining methods and machining tools according to the machining characteristics and machining area of ​​the workpiece, and set the cutting speed, cutting depth, feed rate, allowance, feed, and retract during machining; after all program parameters are set, use the tool path editor in the UG module to uniformly change the feed point and retract point of each tool to Z600mm; (6) Prepare a machining tool table, which shall indicate the component number, part name, process number, process name, equipment model, equipment name, material brand, material hardness, model, version, and program number, and shall be accompanied by a CAD schematic diagram of the process model of the current machining process, and shall indicate the coordinate system direction and the reference tool point position, and shall be accompanied by a CAD schematic diagram of the tool model, and shall indicate the tool setting point direction, and shall set the tool code, tool number, tool compensation number, tool body and blade model, and material number in sequence; (7) Use UG software post-processing to convert the tool path information into a G-code processing NC program. Import the on-site processing machine tool 3D model, tool model, workpiece process model, tooling model, and G-code processing NC program into the NCSIMUL software. Use NCSIMUL software to perform 3D simulation of the processing NC program. After confirming that there is no interference between the tools, apply it to actual on-site processing.

2. The high-efficiency CNC turning machining method for nickel-based high-temperature alloy turbine disk according to claim 1 is characterized by: Step (1) is specifically as follows: a. Name the two surfaces of the nickel-based high-temperature alloy turbine disk as surface A and surface B, and rough-process surface A and surface B: according to the blank drawing and the rough-processing process drawing, the cutting area to be processed is divided into three layers with a 5mm margin, and processed layer by layer in sequence. After processing the first layer, a margin of 1.5mm is left, and a margin of 0.5mm is left for processing the second layer. The third layer is processed in 2 even passes to remove all the margins; b. Semi-finishing of surface A and surface B: According to the roughing process diagram and semi-finishing process diagram, the cutting area to be processed is divided into two layers with a 1mm margin, and processed layer by layer in sequence. After processing the first layer, a margin of 0.5mm is left. The second layer is processed in 2 even passes to remove all the margins; c. Finishing of surface A and surface B: According to the semi-finishing process diagram and the finishing process diagram, the cutting area to be processed is left with a 0.5mm allowance, and the tool is evenly passed in 2 times to remove all the allowance.

3. The high-efficiency CNC turning machining method for nickel-based high-temperature alloy turbine disk according to claim 1 is characterized by: Step (2) is specifically as follows: (i) After the rough machining of the parts is completed, the parts are placed at room temperature for 36-48 hours; (ii) Set the semi-finishing cutting area to two cutting layers for machining, leaving a 0.5 mm margin after machining the first cutting layer, then release the pressing plate that clamps the part, let the part be in a free state and place it on the machine for at least 4 hours, re-align the workpiece runout within 0.01, and use the pressing plate to clamp the part; (iii) During fine machining, the reference surface is first machined, and the reference surface is cut in two layers, with a single cutting depth of 0.25 mm. The cutting tool is cut with the reference surface, and the installation edge is machined in three layers, with a single cutting depth of 0.1 mm and a 0.2 mm allowance. Then the inner hole, outer diameter, auxiliary plate surface, and groove parts are fine machined in two layers, with a single cutting depth of 0.25 mm. Finally, the installation edge is machined in two layers, with a single cutting depth of 0.1 mm. (iv) When turning the air seal teeth, use a straight groove cutter to process the air seal teeth. First, use CNC alternating slotting and then unidirectional linear progressive processing method layer by layer. According to the arrangement order of the teeth from top to bottom of the spur comb teeth, use a right-angle groove cutter to process the inner cutting area of ​​the spur teeth one by one using CNC alternating slotting method, leaving an allowance of 0.2mm, then fine turn the outer diameter of the spur teeth, leaving an allowance of 0.1mm from top to bottom, and then remove all the allowances, and then perform unidirectional linear cutting layer by layer in sequence. At the cutting layer area, move the tool along the inner wall surfaces on both sides of the spur teeth, and connect the tool at R at the bottom of the tooth. After the cutting layer area is processed, leave an allowance of 0.1mm; then process the remaining cutting layer areas according to the above method to remove all the allowances until all the spur comb teeth are processed.

4. The high-efficiency CNC turning machining method for nickel-based high-temperature alloy turbine disk according to claim 1 is characterized by: The setting of the three processing element parameters in step (4) includes: During rough machining: cutting speed Vc = 25m / min, cutting depth ap = 1-1.5mm, feed rate f = 0.25mm / r, surface roughness Ra1.6; During semi-finishing: cutting speed Vc = 28m / min, cutting depth ap = 0.5mm, feed rate f = 0.2mm / r, surface roughness Ra1.6; During finishing: cutting speed Vc = 30m / min, cutting depth ap = 0.25mm, feed rate f = 0.15mm / r, surface roughness Ra1.6; When turning air-sealed teeth: cutting speed Vc = 30m / min, cutting depth ap = 0.1mm, feed rate f = 0.12mm / r, surface roughness Ra1.6; When finishing the mounting edge: cutting speed Vc=32m / min, cutting depth ap=0.05mm, feed rate f=0.1mm / r, surface roughness is Ra0.

8.

5. The high-efficiency CNC turning method for nickel-based high-temperature alloy turbine disk according to claim 2 is characterized by: Step (1) The tool path for rough machining of surface A and surface B: at the inner hole and outer diameter, axial cutting is used, and the tool is cut in layers from top to bottom; the contour end face and auxiliary plate surface are cut in radial direction, and the tool is cut back and forth along the end face contour from the outside to the center; at the groove at the lower part of the installation edge, CNC alternating slotting is used first, followed by a unidirectional linear progressive machining method layer by layer, and then the tool is cut in layers along the inner wall surfaces on both sides, and the tool is connected at R at the bottom of the groove.

6. The high-efficiency CNC turning machining method for nickel-based high-temperature alloy turbine disk according to claim 2 is characterized by: Step (1) The tool path for semi-finishing surface A and surface B: At the inner hole and outer diameter, axial cutting is used, and the tool is cut in a single direction from top to bottom; at the contour end face and auxiliary plate surface, radial cutting is used, and the tool is cut in a single direction from the outside to the center along the end face contour; at the groove at the bottom of the installation edge, the tool is cut in a single direction along the inner wall surfaces on both sides, and the tool is connected at R at the bottom of the groove.

7. The high-efficiency CNC turning machining method for nickel-based high-temperature alloy turbine disk according to claim 2 is characterized by: Step (1) Tool path for finishing surface A and surface B: At the inner hole and outer diameter, axial cutting is used, and the tool is cut in a single direction from top to bottom; the contour end face and auxiliary plate surface are cut in a radial direction, and the tool is cut in a single direction from the outside to the center along the end face contour; at the groove at the bottom of the installation edge, the tool is cut in a single direction along the inner wall surfaces on both sides, and the tool is connected at R at the bottom of the groove.

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