A rough-fine integrated pulsating electrochemical machining machine tool for a blisk

Abstract

The application discloses a blisk multi-tool rough-fine integrated pulsating electrochemical machining machine tool, and relates to the technical field of electrochemical machining, which comprises a machine tool body, wherein the machine tool body comprises a base, a left stand column, a right stand column and a middle stand column; a workpiece movement platform is installed on the middle stand column; the workpiece movement platform comprises a workpiece vertical movement platform; the workpiece vertical movement platform is connected with a workpiece rotary workbench; and the rotary end of the workpiece rotary workbench is used for fixing a blisk workpiece; an upper tool beam and a lower tool beam are arranged between the left stand column and the right stand column; the lower tool beam is connected with a tool vertical movement platform; the upper tool beam is connected with an upper tool disc through an upper rotary vibration device; the lower tool beam is connected with a lower tool disc through a lower rotary vibration device; the lower surface of the upper tool disc is circumferentially and uniformly provided with a plurality of blade back electrodes and a plurality of tube electrodes; and the upper surface of the upper tool disc is circumferentially and uniformly provided with a plurality of blade basin electrodes. The application simplifies the overall blisk machining process, and has high machining precision and work efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrolytic machining technology, and in particular to a pulsed dynamic electrolytic machining machine tool with a multi-tool roughing and finishing system for impellers. Background Technology

[0002] With the continuous progress and development of the aviation industry and the constant improvement of the performance of new aircraft, the requirements for aerospace engines are becoming increasingly stringent. Among aerospace engines, the integral bladed disk (IBD) is the most critical and important component, its performance directly determining the engine's overall performance. However, the IBD structure in aerospace engines is complex, with ultra-thin, twisted blades, sharp leading and trailing edges, narrow blade passages, and typically uses difficult-to-machine materials such as nickel-based superalloys and titanium alloys. This presents new challenges to the manufacturing of IBDs.

[0003] Electrolytic machining (EMC) is based on the principle of anodic dissolution of metals through electrochemical processes to remove material and produce parts that meet requirements. During the machining process, the tool cathode (connected to the negative terminal of the power supply) and the workpiece (connected to the positive terminal) do not contact each other, maintaining a certain machining gap. A high-speed flowing electrolyte passes between the tool cathode and the workpiece anode, and the anode metal continuously dissolves under the action of the electrochemical reaction. Therefore, EMC is not limited by material hardness and can efficiently machine materials with poor machinability, such as titanium alloys and high-temperature alloys. It has a particularly significant advantage in multi-tool machining of integral bladed disks.

[0004] Currently, the electrochemical machining of integral bladed disks mainly consists of two processes: rough machining of the blade channel and finish machining of the blade profile. To achieve these machining methods, researchers have invented several multi-axis CNC linkage electrochemical machining tools. For example, the "Complex Surface CNC High-Efficiency Electrochemical Machining Machine Tool" disclosed in patent number CN104259604B designs a five-axis CNC linkage machine tool capable of rough electrochemical machining of the blade channel sleeve and radial feed for complex surface parts such as integral bladed disks and diffusers. The "Three-Axis Flexible Feed Blade Electrochemical Machining Method" disclosed in patent number CN100377820C invented a three-head flexible feed blade electrochemical machining machine tool, which can simultaneously machine the blade profile and rim structure through the opposing movement of the tool cathode and the translation of the workpiece. The patent CN113523468B discloses an "Electrolytic machining machine tool for integral blades with dual feed axes that can tilt," which mentions a machine tool structure with tiltable feed axes. After the blade's blade base and back profile are finished, it can complete the tangential feed precision shaping of the leading and trailing edges.

[0005] In existing technologies, due to significant differences in the relative motion between the tool cathode and the workpiece in different processes, the electrolytic machining of the entire profile of the blades of an integral bladed disk needs to be completed on different processing equipment. Furthermore, the electrolytic machining tools mentioned in the aforementioned patents can only perform single-electrode machining, meaning that a single electrode is used to process individual channels or blades one by one. For example, an integral bladed disk with 90 blades would require repeated machining 90 times, which would severely reduce the machining efficiency of the integral bladed disk.

[0006] In recent years, with the development and mass production of new engines, the annual production of various integral bladed disks will increase exponentially, creating an urgent need to further improve processing efficiency and reduce processing costs. Multi-tool electrolytic machining of integral bladed disks is an effective method to significantly improve processing efficiency, but existing equipment struggles to achieve simultaneous multi-tool machining. Therefore, there is an urgent need to develop new electrolytic machining tools to meet the precision and high-efficiency electrolytic machining requirements of integral bladed disk blade channels and blades. Summary of the Invention

[0007] The purpose of this invention is to provide a multi-tool integrated roughing and finishing pulse dynamic electrochemical machining tool for bladed disks, which solves the technical problems existing in the prior art and meets the motion requirements of two processes: roughing of the blade channel and pulse dynamic finishing of the blade surface of the integral bladed disk. The finishing process begins immediately after roughing, and the switching and connection of the integral bladed disk machining processes can be achieved without re-clamping, thereby realizing the multi-tool electrochemical machining forming of the integral bladed disk and significantly shortening the overall bladed disk machining cycle.

[0008] To achieve the above objectives, the present invention provides the following solution:

[0009] This invention discloses a multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining machine tool for impeller disks, including a machine tool body. The machine tool body includes a base, a left column, a right column, and a middle column. The left column, the right column, and the middle column are all fixed to the upper end of the base. The left column and the right column are located on the left and right sides of the middle column, respectively.

[0010] A workpiece motion platform is installed on the intermediate column. The workpiece motion platform includes a vertical workpiece motion platform. The moving end of the vertical workpiece motion platform is connected to a workpiece rotary table. The rotating end of the workpiece rotary table is used to fix the impeller workpiece.

[0011] An upper tool beam and a lower tool beam are provided between the left column and the right column. The lower tool beam is connected to a tool vertical motion platform, which can drive the lower tool beam to move up and down. The upper tool beam is connected to an upper tool disk through an upper rotary vibration device, and the lower tool beam is connected to a lower tool disk through a lower rotary vibration device. Multiple blade back electrodes and multiple tube electrodes are evenly distributed on the circumference of the lower surface of the upper tool disk, and multiple blade basin electrodes are evenly distributed on the circumference of the upper surface of the upper tool disk. The workpiece rotary table can pass through the upper tool disk.

[0012] Preferably, the workpiece vertical motion platform includes a workpiece vertical moving base, which is fixed on the intermediate column. A workpiece vertical drive motor is fixed to the upper end of the workpiece vertical moving base. The output shaft of the workpiece vertical drive motor is connected to a workpiece vertical drive screw. A workpiece vertical drive slider is threaded onto the workpiece vertical drive screw. The workpiece vertical drive slider is slidably connected to the workpiece vertical moving base.

[0013] Preferably, the workpiece rotary table is a rotary motor.

[0014] Preferably, there are two tool vertical motion platforms, which are fixed to the opposite sides of the left column and the right column, and are respectively connected to both sides of the lower tool crossbeam.

[0015] The tool vertical motion platform includes a tool vertical moving base, a tool vertical drive motor is fixed on the tool vertical moving base, the output shaft of the tool vertical drive motor is connected to a tool vertical drive screw, a tool vertical drive slider is threadedly connected to the tool vertical drive screw, and the tool vertical drive slider is slidably connected to the tool vertical moving base.

[0016] Preferably, the upper tool beam has an inverted Z-shaped structure; the lower tool beam has a Z-shaped structure.

[0017] Preferably, the lower end of the upper tool beam is provided with an upper fixed turntable, and the upper rotary vibration device includes an upper turntable bearing, an upper transverse drive motor, an upper transverse drive screw, an upper transverse drive slider, and an upper vibrator. The upper turntable bearing is sleeved on the outside of the upper fixed turntable. The upper transverse drive motor is mounted on the upper tool beam. The output shaft of the upper transverse drive motor is connected to the upper transverse drive screw. The upper transverse drive screw is threadedly connected to the upper transverse drive slider. The upper vibrator is fixed on the upper transverse drive slider. A vibration spindle is fixed on the upper vibrator. The vibration spindle of the upper vibrator is hinged to the upper tool disc through a linkage mechanism.

[0018] The upper end of the lower tool beam is provided with a lower fixed turntable. The lower rotary vibration device includes a lower turntable bearing, a lower transverse drive motor, a lower transverse drive screw, a lower transverse drive slider, and a lower vibrator. The lower turntable bearing is sleeved on the outside of the lower fixed turntable. The lower transverse drive motor is mounted on the lower tool beam. The output shaft of the lower transverse drive motor is connected to the lower transverse drive screw. The lower transverse drive screw is threadedly connected to the lower transverse drive slider. The lower vibrator is fixed on the lower transverse drive slider. A vibration spindle is fixed on the lower vibrator. The vibration spindle of the lower vibrator is hinged to the lower tool disc through a linkage mechanism.

[0019] Preferably, the tube electrode is fixed to the lower end of the upper tool disk by an extension rod, and the tube electrode is located below the leaf back electrode.

[0020] Preferably, the lower tool disk has a plurality of tool relief grooves evenly arranged in the circumferential direction, and the tube electrode can pass through the tool relief grooves.

[0021] Preferably, the upper tool disk is provided with an upper connecting and fixing protrusion, which is used to hinge with the upper rotary vibration device;

[0022] The lower tool disk is provided with a lower connecting and fixing protrusion, which is used to hinge with the lower rotary vibration device.

[0023] The present invention achieves the following technical effects compared to the prior art:

[0024] 1. This invention provides a multi-tool integrated roughing and finishing pulse dynamic electrolytic machining machine tool for impeller disks, which meets the motion requirements of two processes: roughing of the blade channel of the integral impeller disk and pulse dynamic finishing of the blade surface. After the roughing is completed, it immediately enters the finishing process. The switching and connection of the integral impeller disk processing process can be realized without re-clamping, which simplifies the integral impeller disk processing flow, helps to improve the processing accuracy and significantly shorten the development cycle of the electrolytic machining machine tool.

[0025] 2. In this invention, the roughing of the integral bladed disk blade channel and the finishing of the blade profile both adopt the multi-tool electrolytic machining mode. The multi-tool electrolytic machining is achieved by driving the upper tool disk, lower tool disk and bladed disk workpiece with linear feed and rotation of the machine tool. This greatly simplifies the structure of the multi-electrode electrolytic machining machine tool, improves the machining efficiency of the integral bladed disk and reduces the machining cost.

[0026] 3. In this invention, the tube electrode used for roughing and the profile electrode used for finishing are mounted on a tool disk to form an integrated composite tool. This allows for individual design and assembly to meet the requirements of a specific blade channel and blade profile. During machining, each cathode is individually energized and insulated from the others. This avoids the effects of stray corrosion, ensures uniform allowance distribution, and improves machining accuracy. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the impeller multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining tool in Embodiment 1;

[0029] Figure 2 This is a schematic diagram of the base structure in the multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining tool with impeller disk, as shown in Example 1.

[0030] Figure 3 This is a schematic diagram of the structure on the lower tool beam of the multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining tool with impeller;

[0031] Figure 4 This is a schematic diagram of the structure on the upper tool beam of the multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining tool with impeller in Example 1;

[0032] Figure 5 This is a schematic diagram of the upper rotary vibration device in the multi-tool roughing and finishing integrated pulse dynamic electrolytic machining tool with impeller;

[0033] Figure 6 This is a schematic diagram of the upper tool disk in the multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining tool with a blade disk, as shown in Example 1.

[0034] Figure 7 This is a schematic diagram of the lower tool disc in the multi-tool roughing and finishing integrated pulsed dynamic electrolytic machining tool with a blade disc, as shown in Embodiment 1.

[0035] Figure 8 This is a schematic diagram of the roughing process of the blade channel in the processing method of the multi-tool roughing and finishing integrated pulse dynamic electrolytic machining machine tool for bladed disks in Example 2;

[0036] Figure 9 for Figure 8 A magnified view of a portion of the image;

[0037] Figure 10This is a schematic diagram of the pulse dynamic finishing of the blade surface in the processing method of the multi-tool roughing and finishing integrated pulse dynamic electrolytic machining machine tool for blade disks in Example 2;

[0038] Figure 11 for Figure 10 A magnified view of a portion of the image;

[0039] In the diagram: 1. Base; 2. Left column; 3. Tool vertical motion platform; 4. Upper tool beam; 4-1. Upper rotary table bearing; 5. Workpiece rotary table; 6. Workpiece vertical motion platform; 7. Middle column; 8. Right column; 9. Upper rotary vibration device; 10. Lower rotary vibration device; 11. Lower tool beam; 11-1. Lower rotary table bearing; 12. Vibration spindle; 13. Linkage mechanism; 14. Upper tool disc; 14-1. Upper connecting and fixing protrusion; 15. Blade back electrode; 16. Extension rod; 17. Tube electrode; 18. Lower tool disc; 18-1. Lower connecting and fixing protrusion; 19. Tool groove; 20. Blade basin electrode; 21. Blade disc workpiece. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] The purpose of this invention is to provide a multi-tool integrated roughing and finishing pulse dynamic electrochemical machining tool for bladed disks, which solves the technical problems existing in the prior art and meets the motion requirements of two processes: roughing of the blade channel and pulse dynamic finishing of the blade surface of the integral bladed disk. The finishing process begins immediately after roughing, and the switching and connection of the integral bladed disk machining processes can be achieved without re-clamping, thereby realizing the multi-tool electrochemical machining forming of the integral bladed disk and significantly shortening the overall bladed disk machining cycle.

[0042] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figures 1-7 As shown, this embodiment provides a multi-tool integrated roughing and finishing pulsed electrolytic machining machine tool for impeller disks, including a machine tool body, such as... Figure 2As shown, the machine tool body includes a base 1, a left column 2, a right column 8, and a middle column 7. The left column 2, the right column 8, and the middle column 7 are all fixed to the upper end of the base 1. The left column 2 and the right column 8 are located on the left and right sides of the middle column 7, respectively. That is, the left column 2 and the right column 8 are fixed to the left and right ends of the upper surface of the base 1, respectively, while the middle column 7 is fixed to the middle of the upper surface of the base 1. The middle column 7 is also located behind the left column 2 and the right column 8.

[0045] A workpiece motion platform is installed on the central column 7. The workpiece motion platform includes a vertical workpiece motion platform 6, the moving end of which is connected to a workpiece rotary table 5. The vertical workpiece motion platform 6 can drive the workpiece rotary table 5 and the impeller workpiece 21 to move up and down. The rotating end of the workpiece rotary table 5 is used to fix the impeller workpiece 21, and the workpiece rotary table 5 can drive the impeller workpiece 21 to rotate.

[0046] An upper tool beam 4 and a lower tool beam 11 are provided between the left column 2 and the right column 8. The two ends of the upper tool beam 4 are fixed to adjacent surfaces of the left column 2 and the right column 8, respectively. A tool vertical movement platform 3 is connected to each end of the lower tool beam 11. The two tool vertical movement platforms 3 are fixed to adjacent surfaces of the left column 2 and the right column 8, respectively, and can drive the lower tool beam 11 to move up and down. The upper tool beam 4 is connected to an upper tool disk 14 via an upper rotary vibration device 9, and the lower tool beam 11 is connected to a lower tool disk 18 via a lower rotary vibration device 10. The upper rotary vibration device 9 and the lower rotary vibration device 10 have identical structures, enabling them to rotate the upper tool disk 14 and the lower tool disk 18 at a certain angle and to apply vibration to both. The lower surface of the upper tool disk 14 is evenly distributed with multiple blade back electrodes 15 and multiple tube electrodes 17, and the upper surface of the upper tool disk 14 is evenly distributed with multiple blade basin electrodes 20. The workpiece rotary table 5, the upper tool disk 14 and the lower tool disk 18 are collinear, and the lower end of the workpiece rotary table 5 can pass through the upper tool disk 14.

[0047] In practical use, the impeller workpiece 21 is first installed on the workpiece rotary table 5. Then, the upper and lower work plates are connected to the negative terminal of the pulse power supply, and the impeller workpiece 21 is connected to the positive terminal of the pulse power supply. The workpiece vertical motion platform 6 and the workpiece rotary table 5 move the impeller workpiece 21 towards the tube electrode 17, which then processes the expected number of blade channels on the impeller workpiece 21. Next, the workpiece vertical motion platform 6 and the tool vertical motion platform 3 move the blade back electrode 15 and the blade base electrode 20 to their respective blade channels, positioning them on the blade back profile and blade base profile, respectively. Finally, electrolytic finishing is performed using the blade back electrode 15 and the blade base electrode 20 to complete the entire machining process.

[0048] In this embodiment, the workpiece vertical motion platform 6 includes a workpiece vertical moving base, which is fixed on the central column 7. A workpiece vertical drive motor is fixed at the upper end of the workpiece vertical moving base. The output shaft of the workpiece vertical drive motor is connected to a workpiece vertical drive screw. The workpiece vertical drive screw is vertically arranged, and both ends of the workpiece vertical drive screw are mounted on the workpiece vertical moving base through bearing seats. A workpiece vertical drive slider is threadedly connected to the workpiece vertical drive screw. The workpiece vertical drive slider is provided with an internal threaded through hole corresponding to the workpiece vertical drive screw. One side of the workpiece vertical drive slider abuts against and slides against the workpiece vertical moving base.

[0049] In actual use, the vertical drive motor of the workpiece can be turned on to drive the vertical drive screw of the workpiece to rotate. Since the vertical drive slider of the workpiece abuts against the vertical moving base of the workpiece, the vertical drive slider of the workpiece can only move in a straight line with the rotation of the vertical drive screw of the workpiece, and finally drive the rotary table 5 of the workpiece and the impeller workpiece 21 to move up and down synchronously.

[0050] In this embodiment, the workpiece rotary table 5 uses an existing rotary motor, and the output shaft of the rotary motor is fixedly connected to the bladed workpiece 21, so that the bladed workpiece can rotate with the rotation of the output shaft of the rotary motor. Furthermore, those skilled in the art can select the specific model and other relevant parameters of the rotary motor according to the actual situation.

[0051] In this embodiment, there are two tool vertical motion platforms 3. The two tool vertical motion platforms 3 have the same structure. The two tool vertical motion platforms 3 are fixed to the opposite sides (i.e. adjacent sides) of the left column 2 and the right column 8. The two tool vertical motion platforms 3 are respectively connected to the left and right sides of the lower tool crossbeam 11.

[0052] Regarding the specific structure of the tool vertical motion platform 3, it includes two tool vertical moving bases, which are respectively fixed to the left column 2 and the right column 8. Each tool vertical moving base is fixed with a tool vertical drive motor. The output shaft of the tool vertical drive motor is connected to a tool vertical drive screw, and both ends of the tool vertical drive screw are fixed to the tool vertical moving base via bearing seats. A tool vertical drive slider is threaded onto the tool vertical drive screw, and one side of the tool vertical drive slider abuts against and slides against the tool vertical moving base.

[0053] In actual use, the tool vertical drive motor can be turned on to drive the tool vertical drive screw to rotate. Since the tool vertical drive slider is against the tool vertical moving base, the tool vertical drive slider can only move up and down in a straight line as the tool vertical drive screw rotates. Finally, the two tool vertical drive sliders together drive the lower tool beam 11 to move up and down.

[0054] In this embodiment, the upper tool beam 4 is an inverted Z-shaped structure; similarly, the lower tool beam 11 is a Z-shaped structure, and the two tool vertical movement platforms 3 and the lower tool beam 11 located in the middle form a gantry structure driven by dual synchronous axes.

[0055] In this embodiment, as Figure 4 As shown, the lower end of the upper tool beam 4 is equipped with an upper fixed turntable. It is particularly important to note that the upper fixed turntable has a through-hole at its center, allowing the workpiece rotary table 5 to pass through the upper tool beam 4. The upper rotary vibration device 9 includes an upper turntable bearing 4-1, an upper transverse drive motor, an upper transverse drive screw, an upper transverse drive slider, and an upper vibrator. The upper vibrator can be any existing vibrator, exciter, vibration motor, or vibration generator of suitable size. The inner ring of the upper turntable bearing 4-1 is fitted onto the outer side of the upper fixed turntable, and the outer ring of the upper turntable bearing 4-1 is fixedly connected to the inner ring of the upper tool disc 14. The upper transverse drive motor is mounted on the upper tool beam 4. The output shaft of the upper transverse drive motor is connected to an upper transverse drive screw. Both ends of the upper transverse drive screw are rotatably connected to the upper tool beam 4 via bearing seats. An upper transverse drive slider is threaded onto the upper transverse drive screw. One side of the upper transverse drive slider abuts against and slides against the upper tool beam 4. An upper vibrator is fixed to the other side of the upper transverse drive slider. A vibrating spindle 12 is fixed to the upper vibrator. The vibrating spindle 12 of the upper vibrator is hinged to the upper tool disk 14 via a linkage mechanism 13. Specifically, as shown... Figure 4 As shown, the connecting mechanism includes a horizontal connecting rod and a vertical connecting rod. One end of the horizontal connecting rod is rotatably connected to the vibration main shaft 12, the other end of the horizontal connecting rod is rotatably connected to the lower end of the vertical connecting rod, and the upper end of the vertical connecting rod is rotatably connected to the upper tool disk 14.

[0056] When the upper tool disk 14 needs to be rotated, only the upper transverse drive motor needs to be started. The upper transverse drive motor can drive the upper transverse drive screw to move synchronously. Since the upper transverse drive screw and the upper transverse drive slider form a common screw and nut pair structure, the upper transverse drive slider drives the upper vibrator to move laterally along the axial direction of the upper transverse drive screw. During the movement of the upper vibrator, since the upper vibrator is rotatably connected to the upper tool disk 14 through the linkage mechanism 13, it can drive the upper tool disk 14 to rotate within a small range. The upper vibrator can also provide vibration force to the upper tool disk 14 to realize the working process of pulsed electrolytic molding.

[0057] Similarly, such as Figure 5 As shown, the upper end of the lower tool beam 11 is provided with a lower fixed turntable. Unlike the upper fixed turntable, the lower fixed turntable does not require a central through hole. The lower rotary vibration device 10 includes a lower turntable bearing 11-1, a lower transverse drive motor, a lower transverse drive screw, a lower transverse drive slider, and a lower vibrator. The inner ring of the lower turntable bearing 11-1 is sleeved on the outer side of the lower fixed turntable, and the outer ring of the lower turntable bearing 11-1 is fixedly connected to the inner ring of the lower tool disc 18. The lower transverse drive motor is mounted on the lower tool beam 11, and the output shaft of the lower transverse drive motor is connected to the lower transverse drive screw. The two ends of the lower transverse drive screw are rotatably mounted on the upper surface of the lower tool beam 11 through bearing seats. A lower transverse drive slider is threaded onto the lower transverse drive screw. One side of the lower transverse drive slider abuts against the lower tool beam 11. A lower vibrator is fixed on the other side of the lower transverse drive slider. A vibrating spindle 12 is fixed on the lower vibrator. The vibrating spindle 12 of the lower vibrator is hinged to the lower tool disk 18 through a linkage mechanism 13.

[0058] The working process of the lower rotary vibration device 10 and the specific structure of the linkage mechanism 13 are exactly the same as those of the upper rotary vibration device 9, so they will not be described in detail here.

[0059] In this embodiment, as Figure 6 As shown, the tube electrode 17 is fixed to the lower end of the upper tool disk 14 by extension rods 16. That is, the upper ends of multiple extension rods 16 are circumferentially fixed to the lower surface of the upper tool disk 14, and the lower ends of the extension rods 16 are fixedly connected to the tube electrode 17. The purpose is to position the tube electrode 17 below the leaf back electrode 15, thereby avoiding mutual interference between the tube electrode 17 and the leaf back electrode 15 during operation.

[0060] In this embodiment, a plurality of tool grooves 19 are uniformly arranged in the circumferential direction of the lower tool disk 18. The width of the tool grooves 19 is smaller than the width of the tube electrode 17, so that the tube electrode 17 can pass through the tool grooves 19.

[0061] In this embodiment, as Figure 6As shown, the upper tool disk 14 is provided with an upper connecting and fixing protrusion 14-1, and the upper connecting and fixing protrusion 14-1 is provided with a hinge hole. The hinge hole of the upper connecting and fixing protrusion 14-1 is used to hinge with the vertical connecting rod in the upper rotating vibration device 9.

[0062] Similarly, such as Figure 7 As shown, the lower tool disk 18 is provided with a lower connecting and fixing protrusion 18-1, and the lower connecting and fixing protrusion 18-1 is provided with a hinge hole. The hinge hole of the lower connecting and fixing protrusion 18-1 is used to hinge with the vertical connecting rod in the lower rotating vibration device 10.

[0063] Example 2

[0064] like Figures 8-11 As shown, this embodiment provides a machining method for a multi-tool integrated roughing and finishing pulsed dynamic electrochemical machining tool for impeller disks. Based on the multi-tool integrated roughing and finishing pulsed dynamic electrochemical machining tool for impeller disks disclosed in Embodiment 1, the method includes the following steps:

[0065] S1. First, install the impeller workpiece 21 to be processed onto the workpiece rotary table 5, drive the workpiece vertical motion platform 6 so that the upper surface of the impeller workpiece 21 is located 0.3-0.5mm below the tube electrode 17, and drive the tool vertical motion platform 3 to move the lower tool disk 18 away from the lower surface of the impeller workpiece 21.

[0066] S2. Perform electrolytic rough machining of the blade cascade channels. The entire bladed disk workpiece 21 is fed upwards and rotates around its own axis under the drive of the workpiece vertical motion platform 6. Under the combined action of the workpiece vertical motion platform 6 and the workpiece rotary table 5, the electrolytic rough machining of multiple twisted blade cascade channels is achieved. It should be noted that if the number of tube electrodes 17 is less than the number of blade cascade channels to be machined, one blade cascade channel machining cannot machine all the blade cascade channels. Therefore, after the first blade cascade channel machining is completed, the bladed disk workpiece 21 needs to be returned to the initial position under the drive of the workpiece vertical motion platform 6. The workpiece rotary table 5 drives the blade workpiece to rotate a certain angle, and the above machining process is repeated for the second blade cascade channel rough machining, the third blade cascade channel rough machining, and so on, until all blade cascade channels are machined.

[0067] S3. After the tube electrode 17, formed during the final blade channel shaping, penetrates the lower surface of the bladed disk workpiece 21, the workpiece rotary table 5 is stopped. The workpiece vertical motion platform 6 continues to drive the bladed disk workpiece 21 upward at a faster rising speed than during rough machining, and drives the upper rotary vibration device 9 to rotate the upper tool disk 14 until the blade back electrode 15 is located in the blade channel. At the same time, the lower rotary vibration device 10 is driven to rotate the lower tool disk 18, so that the tool groove 19 of the lower tool disk 18 is located below the tube electrode 17. Subsequently, the tool vertical motion platform 3 is driven to move the lower tool disk 18 upward, so that the tube electrode 17 is fed through the tool groove 19 to below the lower surface of the lower tool disk 18, until the blade basin electrode 20 moves into the blade channel and stops linear motion.

[0068] S4. Perform pulse dynamic electrolytic precision machining of the blade profile. Drive the upper rotating vibration device 9 to rotate the upper tool disk 14, and the blade back electrode 15 gradually approaches the blade back profile. Drive the lower rotating vibration device 10 to rotate the lower tool disk 18, and the blade basin electrode 20 gradually approaches the blade basin profile. At the same time, the vibration main shaft 12 of the upper rotating vibration device 9 and the lower rotating vibration device 10 drives the blade back electrode 15 and the blade basin electrode 20 to perform circumferential vibration, so as to realize the pulse dynamic precision electrolytic forming of multiple blade back profiles and blade basin profiles.

[0069] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks, characterized in that: The machine tool body includes a base, a left column, a right column and a middle column. The left column, the right column and the middle column are all fixed to the upper end of the base. The left column and the right column are located on the left and right sides of the middle column, respectively. A workpiece motion platform is installed on the intermediate column. The workpiece motion platform includes a vertical workpiece motion platform. The moving end of the vertical workpiece motion platform is connected to a workpiece rotary table. The rotating end of the workpiece rotary table is used to fix the impeller workpiece. An upper tool beam and a lower tool beam are provided between the left column and the right column. The lower tool beam is connected to a tool vertical motion platform, which can drive the lower tool beam to move up and down. The upper tool beam is connected to an upper tool disk through an upper rotary vibration device, and the lower tool beam is connected to a lower tool disk through a lower rotary vibration device. Multiple blade back electrodes and multiple tube electrodes are evenly distributed on the circumference of the lower surface of the upper tool disk, and multiple blade basin electrodes are evenly distributed on the circumference of the upper surface of the upper tool disk. The workpiece rotary table can pass through the upper tool disk. The workpiece rotary table is a rotary motor; The lower end of the upper tool beam is provided with an upper fixed turntable. The upper rotary vibration device includes an upper turntable bearing, an upper transverse drive motor, an upper transverse drive screw, an upper transverse drive slider, and an upper vibrator. The upper turntable bearing is sleeved on the outside of the upper fixed turntable. The upper transverse drive motor is mounted on the upper tool beam. The output shaft of the upper transverse drive motor is connected to the upper transverse drive screw. The upper transverse drive screw is threadedly connected to the upper transverse drive slider. The upper vibrator is fixed on the upper transverse drive slider. A vibration spindle is fixed on the upper vibrator. The vibration spindle of the upper vibrator is hinged to the upper tool disc through a linkage mechanism. The upper end of the lower tool beam is provided with a lower fixed turntable. The lower rotary vibration device includes a lower turntable bearing, a lower transverse drive motor, a lower transverse drive screw, a lower transverse drive slider, and a lower vibrator. The lower turntable bearing is sleeved on the outside of the lower fixed turntable. The lower transverse drive motor is mounted on the lower tool beam. The output shaft of the lower transverse drive motor is connected to the lower transverse drive screw. The lower transverse drive screw is threadedly connected to the lower transverse drive slider. The lower vibrator is fixed on the lower transverse drive slider. A vibration spindle is fixed on the lower vibrator. The vibration spindle of the lower vibrator is hinged to the lower tool disc through a linkage mechanism.

2. The multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks according to claim 1, characterized in that: The workpiece vertical motion platform includes a workpiece vertical moving base, which is fixed on the intermediate column. A workpiece vertical drive motor is fixed to the upper end of the workpiece vertical moving base. The output shaft of the workpiece vertical drive motor is connected to a workpiece vertical drive screw. A workpiece vertical drive slider is threaded onto the workpiece vertical drive screw. The workpiece vertical drive slider is slidably connected to the workpiece vertical moving base.

3. The multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks according to claim 1, characterized in that: There are two vertical movement platforms for the tools, and the two vertical movement platforms for the tools are fixed on the opposite sides of the left column and the right column, and the two vertical movement platforms for the tools are respectively connected to both sides of the lower tool cross beam; The vertical movement platform for the tool includes a tool vertical movement base, a tool vertical drive motor is fixed on the tool vertical movement base, the output shaft of the tool vertical drive motor is connected with a tool vertical drive screw rod, a tool vertical drive slider is threadedly connected to the tool vertical drive screw rod, and the tool vertical drive slider is slidably connected to the tool vertical movement base.

4. The multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks according to claim 1, characterized in that: The upper tool cross beam is an inverted U-shaped structure; the lower tool cross beam is a U-shaped structure.

5. The multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks according to claim 1, characterized in that: The pipe electrode is fixed to the lower end of the upper tool disc through an extension rod, and the pipe electrode is located below the blade back electrode.

6. The multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks according to claim 1, characterized in that: A plurality of relief grooves are uniformly arranged in the circumferential direction of the lower tool disc, and the pipe electrode can pass through the relief grooves.

7. The multi-tool integrated roughing and finishing pulsed electrolytic machining tool for impeller disks according to claim 1, characterized in that: The upper tool disc is provided with an upper connection and fixing convex block, and the upper connection and fixing convex block is used for hinged connection with the upper rotary vibration device; The lower tool disc is provided with a lower connection and fixing convex block, and the lower connection and fixing convex block is used for hinged connection with the lower rotary vibration device.

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