An integral impeller electrolytic forming processing device

Abstract

The present invention provides an integral impeller electrolytic forming processing device, including a bed, a column and a crossbeam, a tooling table that slides back and forth along the Y axis is provided on the bed, a C axis is provided at the center of the workbench, a rotary shaft for fixing a blade disk is provided horizontally on the C axis, a vertically arranged main shaft is provided on the crossbeam, a blade electrolysis assembly is provided at the lower end of the main shaft, the blade electrolysis assembly includes a first cathode, a second cathode and a bidirectional feeding mechanism, a first C-shaped tooling is provided on the first cathode, a second C-shaped tooling is provided on the second cathode, a conductive column and a water pipe joint are provided on the first C-shaped tooling and the second C-shaped tooling, and an electrolyte flow channel is provided between the liquid outlets of the first cathode and the second cathode processing surfaces and the water pipe joint. The present invention adopts a bidirectional screw to drive the first cathode and the second cathode to move toward or away from each other at the same speed at the same time to process the blades, thereby ensuring the processing quality of the blades, the product processing precision is high, the equipment manufacturing cost is greatly reduced, and it is conducive to the occurrence of domestic electrolytic processing.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic machining, in particular to an integral impeller electrolytic forming machining device. Background Art

[0002] Electrolytic machining is a method based on the principle of electrochemical anode dissolution, which uses the tool cathode to process the workpiece into a predetermined size and shape. During the machining process, the workpiece is connected to the positive pole of the power supply, and the tool cathode is connected to the negative pole of the power supply. A certain inter-electrode gap is maintained between the workpiece anode and the tool cathode, and a high-speed flowing electrolyte is passed into the inter-electrode gap to form a conductive path between the workpiece and the cathode. As the cathode is fed to the workpiece, the workpiece material is continuously dissolved and eroded, and the electrolysis products are carried away by the high-speed flowing electrolyte. When the cathode is fed to the predetermined position, the machining is completed. Compared with traditional machining technology, electrolytic machining has the advantages of no cathode loss, a wide machining range, and high machining surface quality. Therefore, it is widely used in the machining of aircraft engine parts such as integral blades and diffusers.

[0003] In the prior art, the electrolytic processing equipment for processing blades of integral blisks is provided with two electrolytic cathodes, one for processing the back of the blade and the other for processing the blade basin. The two electrolytic cathodes are processed by two separate drives, respectively. The blade processing accuracy may deviate, affecting product quality. At present, most of such equipment is imported from abroad, which is expensive and has high production costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, the present invention provides an integral impeller electrolytic forming processing device.

[0005] The technical solution to be adopted by the present invention to solve its technical problems is: an integral impeller electrolytic forming processing device, including a machine tool bed, a column and a crossbeam, the bed is provided with a tooling table that slides back and forth along the Y axis, the crossbeam is horizontally arranged above the tooling table, the columns are arranged at both ends of the crossbeam, the lower ends of the columns are fixedly connected to the bed, a C axis is arranged at the center of the workbench, a rotary shaft for fixing the blade disk is horizontally arranged on the C axis, a servo motor is connected to the rotary shaft for transmission, a vertically arranged main shaft is arranged on the crossbeam, a blade electrolysis assembly is arranged at the lower end of the main shaft, and a drive for driving the blade electrolysis assembly to move vertically is arranged on the main shaft. The invention relates to a driving device for approaching or moving away from the blade disk in a certain direction, the blade electrolysis assembly comprises a first cathode matched with the back of the blade, a second cathode matched with the blade basin and a two-way feeding mechanism for controlling the first cathode and the second cathode to move closer to or farther from each other, the motion symmetry center plane of the two-way feeding mechanism coincides with the rotation center plane of the rotating shaft, a first C-shaped tooling is provided on the first cathode, a second C-shaped tooling is provided on the second cathode, a conductive column connected to a power source and a water pipe joint connected to an electrolyte are provided on the first C-shaped tooling and the second C-shaped tooling, and an electrolyte flow channel is provided between the liquid outlet of the first cathode and the second cathode processing surface and the water pipe joint.

[0006] The blade disk workpiece is installed on the rotating shaft in a vertical state. The workpiece is connected to the positive pole of the power supply, and the tooling table slides back and forth along the Y-axis to make the blade disk in the correct position below the main shaft; the first C-shaped tooling and the second C-shaped tooling are used to arrange the electrolyte flow channel and connect with the liquid inlet device on the one hand to provide electrolyte for electrolytic machining, and on the other hand to connect with the negative pole of the power supply to form an electrical circuit with the workpiece during electrolytic machining; the lower ends of the first C-shaped tooling and the second C-shaped tooling are respectively connected to the first cathode and the second cathode, and the first C-shaped tooling and the second C-shaped tooling are driven by the two-way feeding mechanism to control the first cathode and the second cathode to move toward or away from each other at the same speed at the same time, so as to perform electrolytic machining on the back and basin of the blade and ensure the quality of the electrolytic machining of the blade; the main shaft is used to drive the first cathode and the second cathode to descend.

[0007] Furthermore, in order to control the first cathode and the second cathode to move closer to or farther from each other and ensure the processing quality of the blades, the bidirectional feeding mechanism includes a bracket, a first slide and a second slide, a slide groove is provided in the bracket along the horizontal direction, the first slide and the second slide are both slidably connected to the slide groove, a bidirectional screw is horizontally provided in the slide groove, the bidirectional screw passes through the first slide and the second slide and is threadedly connected to the first slide and the second slide, the rotation of the bidirectional screw drives the first slide and the second slide to move closer to or farther from each other, the first C-shaped tool is fixedly connected to the first slide, and the second C-shaped tool is fixedly connected to the second slide. The rotation of the bidirectional screw drives the first slide and the second slide to move closer to or farther from each other on the bracket, thereby driving the first C-shaped tool and the second C-shaped tool to move closer to or farther from each other, thereby driving the first cathode and the second cathode to move closer to or farther from each other.

[0008] Furthermore, a flow field protection cover is provided on the tooling table, and the flow field protection cover is provided on the outside of the C axis. A processing groove matching the blade is provided on the upper end of the flow field protection cover. The flow field protection cover is to ensure that the electrolyte does not leak directly from both sides during the electrolytic processing of the blade, and plays a certain pressure-maintaining role, so that the electrolyte flows out from the blade root and blade tip, which can prevent and ensure the stable progress of the processing process.

[0009] Furthermore, in order to control the automatic advance and retreat of the first cathode and the second cathode, a servo motor is connected to the bidirectional screw.

[0010] Furthermore, in order to ensure uniform and stable feeding of electrolyte, the first cathode and the second cathode liquid outlet are long strip structures arranged along the diagonal of the processing surface. The shape of the cathode liquid outlet adopts a diagonal long strip structure, which can ensure uniform flow rate in the entire processing gap without lack of liquid and eddy current.

[0011] Furthermore, the workbench is made of a non-conductive material with high flatness and high structural strength, such as marble.

[0012] The beneficial effects of the present invention are as follows: the present invention provides an integral impeller electrolytic forming processing device, which uses a bidirectional screw to drive the first cathode and the second cathode to move toward or away from each other at the same speed at the same time to process the blades, thereby ensuring the blade processing quality, the product processing accuracy is high, the equipment manufacturing cost is greatly reduced, and it is conducive to the occurrence of domestic electrolytic processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the best embodiment of the present invention;

[0015] Figure 2 yes Figure 1 A is an enlarged schematic diagram;

[0016] Figure 3 yes Figure 2 A magnified schematic diagram of B;

[0017] Figure 4 It is a schematic diagram of the structure of the best embodiment of the present invention with a flow field protection cover;

[0018] Figure 5 yes Figure 4 A magnified schematic diagram of C in the middle.

[0019] In the figure: 1. tooling table, 2. crossbeam, 3. C-axis, 4. blade disk, 4-1, blade, 5. main shaft, 6. first cathode, 7. second cathode, 8. first C-shaped tooling, 9. second C-shaped tooling, 10. conductive column, 11. water pipe joint, 12. liquid outlet, 13. bracket, 14. first slide, 15. second slide, 16. bidirectional screw, 17. flow field protection cover, 17-1, processing groove. DETAILED DESCRIPTION

[0020] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0021] like Figure 1-5 As shown, an integral impeller electrolytic forming processing device of the present invention comprises a machine tool bed, a column and a crossbeam 2, wherein the bed is provided with a tooling table 1 which slides back and forth along the Y axis, the tooling table 1 is made of marble, the crossbeam 2 is horizontally arranged above the tooling table 1, the columns are arranged at both ends of the crossbeam 2, the lower ends of the columns are fixedly connected to the bed, a C-axis 3 is arranged at the center of the workbench, a rotary shaft for fixing a blade disk 4 is horizontally arranged on the C-axis 3, a servo motor is connected to the rotary shaft for transmission, a vertically arranged main shaft 5 is arranged on the crossbeam 2, a blade electrolysis assembly is arranged at the lower end of the main shaft 5, a driving device for driving the blade electrolysis assembly to approach or move away from the blade disk 4 in the vertical direction is arranged on the main shaft 5, and the blade electrolysis assembly The component includes a first cathode 6 matched with the back of the blade 4-1, a second cathode 7 matched with the blade pot of the blade 4-1, and a two-way feeding mechanism for controlling the first cathode 6 and the second cathode 7 to approach or move away from each other, the movement symmetry center plane of the two-way feeding mechanism coincides with the rotation center plane of the rotating shaft, a first C-shaped tooling 8 is provided on the first cathode 6, and a second C-shaped tooling 9 is provided on the second cathode 7. The first C-shaped tooling 8 and the second C-shaped tooling 9 are both provided with a conductive column 10 connected to a power supply and a water pipe joint 11 connected to an electrolyte. An electrolyte flow channel is provided between the liquid outlet 12 of the processing surface of the first cathode 6 and the second cathode 7 and the water pipe joint 11. The liquid outlet 12 of the first cathode 6 and the second cathode 7 is a long strip structure arranged along the diagonal of the processing surface.

[0022] The bidirectional feeding mechanism includes a bracket 13, a first slide 14 and a second slide 15. A slide groove is provided in the bracket 13 along the horizontal direction. The first slide 14 and the second slide 15 are both slidably connected to the slide groove. A bidirectional screw 16 is horizontally provided in the slide groove. The bidirectional screw 16 passes through the first slide 14 and the second slide 15 and is threadedly connected to the first slide 14 and the second slide 15. The rotation of the bidirectional screw 16 drives the first slide 14 and the second slide 15 to move closer to or away from each other. A servo motor is transmission-connected to the bidirectional screw 16. The first C-shaped tooling 8 is fixedly connected to the first slide 14, and the second C-shaped tooling 9 is fixedly connected to the second slide 15.

[0023] The workbench 1 is provided with a flow field protection cover 17, which is arranged outside the C-axis 3. The upper end of the flow field protection cover is provided with a processing groove 17-1 that cooperates with the blade 4-1.

[0024] Processing method:

[0025] Before adopting this processing method, the integral blade disk 4 has been rough-machined by grooving, that is, the material in the channel between the blades 4-1 has been roughly machined away. This processing method is used to improve the molding accuracy and efficiency of the blades 4-1.

[0026] When the integral blade disk 4 is clamped on the rotating shaft and connected to the positive pole of the machining power supply, the first cathode 6 and the second cathode 7 are clamped on the bidirectional feeding mechanism and connected to the negative pole of the machining power supply, the position of the tooling table 1 is adjusted so that the blade disk 4 is in the correct position below the spindle 5.

[0027] The spindle 5 drives the first cathode 6 and the second cathode 7 to enter the inter-leaf channel, and the electrolyte is sprayed from the first cathode 6 and the second cathode 7 outlet 12 into the processing gap (the processing gap is the gap between the cathode and the workpiece anode, and the electrolytic processing is a non-contact processing). Turn on the processing power supply, apply a certain voltage (generally 14-24V, pulse current), and the CNC system controls the bidirectional feeding mechanism to drive the first C-shaped tooling 8 and the second C-shaped tooling 9 to move toward each other, that is, the first cathode 6 and the second cathode 7 are fed to the blade 4-1 at the same time. Under the action of the electric field and the flow field, the materials on both sides of the blade 4-1 are gradually removed by electrolytic processing, and the shapes of the blade basin cathode and the blade back cathode are gradually copied, so that the shape of the blade 4-1 is processed in place. After the processing is completed, turn off the power supply and electrolyte, and the CNC system controls the bidirectional feeding mechanism to drive the first cathode 6 and the second cathode 7 to retreat to a certain safe position, and the spindle 5 moves up and returns to the initial position state.

[0028] During the electrolytic processing of blade 4-1, the processing system monitors the processing current. When the current increases suddenly (before a short circuit occurs), the bidirectional feed mechanism stops moving forward and retreats to a safe value. When the current drops to a normal value, the processing continues. This can effectively control the occurrence of short circuits, reduce cathode burning, and thus improve processing accuracy.

[0029] Directions and references (e.g., up, down, left, right, etc.) in the present invention may only be used to assist in the description of features in the accompanying drawings. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0030] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the scope of the present invention through the above description. The technical scope of this invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An integral impeller electrolytic forming processing device, comprising a machine tool bed, a column and a crossbeam (2), wherein the bed is provided with a tooling table (1) which slides back and forth along the Y axis, the crossbeam (2) is horizontally arranged above the tooling table (1), the columns are arranged at both ends of the crossbeam (2), and the lower ends of the columns are fixedly connected to the bed, characterized in that: A C-axis (3) is provided at the center of the tooling table (1), a rotary shaft for fixing the blade disk (4) is horizontally provided on the C-axis (3), a servo motor is connected to the rotary shaft for transmission, a vertically arranged main shaft (5) is provided on the crossbeam (2), a blade electrolysis assembly is provided at the lower end of the main shaft (5), a driving device for driving the blade electrolysis assembly to approach or move away from the blade disk (4) in the vertical direction is provided on the main shaft (5), and the blade electrolysis assembly comprises a first cathode (6) matched with the back of the blade (4-1), a second cathode (7) matched with the blade basin of the blade (4-1) and a control device for controlling the blade electrolysis assembly to move closer to or away from the blade disk (4) in the vertical direction. A bidirectional feeding mechanism for moving a cathode (6) and a second cathode (7) closer to or farther from each other, wherein the motion symmetry center plane of the bidirectional feeding mechanism coincides with the rotation center plane of the rotation axis, the first cathode (6) is provided with a first C-shaped fixture (8), the second cathode (7) is provided with a second C-shaped fixture (9), the first C-shaped fixture (8) and the second C-shaped fixture (9) are both provided with a conductive column (10) connected to a power source and a water pipe joint (11) connected to an electrolyte, and an electrolyte flow channel is provided between the liquid outlet (12) of the processing surface of the first cathode (6) and the second cathode (7) and the water pipe joint (11); A flow field protection cover (17) is provided on the tooling table (1), the flow field protection cover (17) is provided on the outside of the C axis (3), and a processing groove (17-1) matching with the blade (4-1) is provided at the upper end of the flow field protection cover (17); The liquid outlets (12) of the first cathode (6) and the second cathode (7) are long strip structures arranged along the diagonal line of the processing surface.

2. The device for electrolytic forming of an integral impeller according to claim 1, characterized in that: The bidirectional feeding mechanism comprises a bracket (13), a first slide (14) and a second slide (15); a slide groove is provided in the bracket (13) along the horizontal direction; the first slide (14) and the second slide (15) are both slidably connected to the slide groove; a bidirectional screw (16) is horizontally provided in the slide groove; the bidirectional screw (16) passes through the first slide (14) and the second slide (15) and is threadedly connected to the first slide (14) and the second slide (15); the bidirectional screw (16) rotates to drive the first slide (14) and the second slide (15) to move closer to or away from each other; the first C-shaped tooling (8) is fixedly connected to the first slide (14); and the second C-shaped tooling (9) is fixedly connected to the second slide (15).

3. The device for electrolytic forming of an integral impeller according to claim 2, characterized in that: The bidirectional screw (16) is transmission-connected with a servo motor.

4. The device for electrolytic forming of an integral impeller according to claim 1, characterized in that: The tooling table (1) is made of a non-conductive material with high flatness and high structural strength.

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