Positioning device and method for electric spark shaping of flow channel of additional material manufacturing blade disc

Abstract

The invention relates to a positioning device and method for electric spark shaping of an additive manufacturing blade disc runner, and belongs to the technical field of electric spark machining. The device comprises an operation table, a mounting frame, a positioning adjusting mechanism, a Y-direction moving table assembly, an angle adjusting mechanism and a clamping limiting mechanism. The mounting rack is connected with a numerically-controlled machine tool spindle; the electrode is clamped by an electromagnet of the clamping limiting mechanism; a rotary driving motor of the positioning adjusting mechanism drives the electrodes to rotate uniformly and partition; the X-direction motor adjusts the X-axis position of the electrode; the Y-direction motor changes the Y-axis position of the electrode by adjusting the position of the Y-direction movable block; a pitching adjusting motor of the angle adjusting mechanism adjusts the pitching angle of the electrode on the movable frame; through driving of the motor, preliminary leading-in and withdrawing of the electrode in the blank runner are achieved, and an electric spark numerical control machine tool can conveniently obtain initial coordinates of the electrode. Compared with a traditional mode of calculating and obtaining the initial machining position of the electrode through a visual image technology, the method has the advantages of being high in adaptability, stability and efficiency, low in cost and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of electrospark machining, and in particular to a positioning device and method for electrospark shaping of a blade disk flow channel in additive manufacturing. Background Art

[0002] In the field of turbomachinery EDM, especially for the manufacture of irregular twisted flow channel structures of blade disks and impeller parts, traditional processing methods often rely on removing materials to achieve the final part shape. However, the flow channel space in such parts usually occupies 10% to 50% of the overall volume, which not only leads to a large amount of waste of raw materials, but also increases the utilization rate of equipment. Given that these parts are mostly made of high-priced materials such as high-temperature alloys or titanium alloys, a high proportion of material removal further increases production costs. With the continuous increase in the application proportion of small and medium-sized complex structural parts in industries such as aviation, automobiles, and fans, the axial thrust demand for blade disk parts is often not huge. At the same time, considering that the manufacturing industry is moving towards sustainable development and environmentally friendly applications, additive manufacturing technology will undoubtedly become one of the important tools in this field. Therefore, when the thrust requirements are not very strict, additive manufacturing technology can be used to first manufacture a blade disk blank with a preliminary flow channel structure, and then use EDM technology to accurately trim it to ensure that the flow channel structure meets the necessary accuracy standards. Such a processing strategy can not only effectively reduce the waste of raw materials and reduce production costs, but also improve production efficiency and better adapt to the development trend of the manufacturing industry.

[0003] Additive manufacturing technology can produce parts with complex internal structures and high precision, such as closed turbine discs, blade discs, impellers, etc. However, the flow channels or blades of these parts already have a rough outline, but there may be problems such as insufficient precision or high surface roughness during the additive manufacturing process, and subsequent electrospark machining and other methods are required for shaping and finishing. In this process, how to ensure that the electrode can accurately enter the preliminarily processed flow channel without damaging the blades of the existing blank parts and causing the parts to be scrapped is the key to improving processing accuracy and efficiency. The blade blank parts involved in this patent are parts with preliminary shapes produced by additive manufacturing such as 3D printing technology. Traditional blade disc parts are mostly processed by forging or casting. The rotating body blank of the blade disc is produced by forging or casting (the flow channel and blades are not processed), and then the flow channel is processed by an electrospark CNC machine tool to form blades. In this processing mode, the positioning of the blade mainly depends on the axial position reference and the radial position reference, which are used to accurately determine the relative position of the blade in the axial and radial directions, respectively, so as to ensure the accuracy of the electrode feed position. Given the characteristics of the blade disk as a rotating body, its axial end face and outer circular contour naturally become the ideal choice for these two benchmarks. However, when additive manufacturing is used for processing, the blade already has a certain initial contour. Therefore, the electrode processing starting point must start from a specific circumferential angle position to avoid accidentally etching away the formed blade material during the feeding process, resulting in scrapped parts. Before formally processing the additively manufactured blank, obtaining an accurate initial coordinate for electrode processing is a key step to ensure subsequent processing accuracy and finished product quality. Therefore, it is necessary to propose a positioning device and method for electrospark shaping of the flow channel of an additively manufactured blade disk to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a positioning device and method for electrospark shaping of blisk flow channels in additive manufacturing that is highly accurate and easy to use.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning device for electrospark shaping of blisk flow channels in additive manufacturing, comprising, from top to bottom, a mounting frame, a positioning adjustment mechanism, an operating table, an X-axis moving table assembly, a Y-axis moving table assembly, an angle adjustment mechanism, and a clamping and limiting mechanism; wherein the operating table is fixedly connected to the mounting frame.

[0006] The positioning adjustment mechanism includes a rotary drive motor installed on the operating table through a support seat, the output end of the rotary drive motor is fixedly connected to a connection block, the operating table is internally rotatably connected to a limit plate, and the bottom of the limit plate is fixedly connected to a connection column, which is convenient for uniform rotation partitioning of the electrode, so as to facilitate the electrode to achieve a large angle of rotation during the positioning working stage, and is conducive to accurately recording the rotation angle value. The limit plate is provided with a positioning groove, which cooperates with the connection block to facilitate more stability in the electrode partitioning process.

[0007] The X-axis moving platform assembly includes an X-axis connecting platform fixedly connected below the connecting column, and also includes an X-axis bidirectional threaded rod, an X-axis limiting rod, an X-axis motor, and an X-axis movable block; wherein the X-axis bidirectional threaded rod and the X-axis limiting rod are installed in a cavity in the X-axis connecting platform; the X-axis motor is installed at the left end or the right end of the X-axis connecting platform and the output shaft is connected to one end of the X-axis bidirectional threaded rod; the X-axis movable block is installed on the X-axis bidirectional threaded rod and the X-axis limiting rod, and is threadedly connected to the X-axis bidirectional threaded rod and slidably connected to the X-axis limiting rod, so as to facilitate the adjustment of the relative position of the electrode, adjust the X-axis orientation of the electrode during the guiding process in the blade disk flow channel, and further effectively record the X-axis value of the initial coordinate after the electrode adjustment is completed.

[0008] The Y-axis moving platform assembly includes a Y-axis connecting platform fixedly connected to the lower side of the X-axis movable block, and also includes a Y-axis threaded rod, a Y-axis limiting rod, a Y-axis motor, and a Y-axis movable block; wherein the Y-axis threaded rod and the Y-axis limiting rod are installed in a cavity in the Y-axis connecting platform; the Y-axis motor is installed at the front end or the rear end of the Y-axis connecting platform and the output shaft is connected to one end of the Y-axis threaded rod; the Y-axis movable block is installed on the Y-axis threaded rod and the Y-axis limiting rod, and is threadedly connected to the Y-axis threaded rod and slidably connected to the Y-axis limiting rod, so as to facilitate the adjustment of the Y-axis orientation of the electrode during the guiding process in the leaf disk flow channel, avoid the collision between the electrode and the blade crown, etc. during the guiding process, and further effectively record the Y-axis value of the initial coordinate after the electrode adjustment is completed.

[0009] The angle adjustment mechanism includes a support frame fixedly connected to the bottom of the Y-axis movable block, a movable frame is hingedly connected to the bottom of the support frame, and a toothed plate is fixedly connected to the movable frame; a worm and a rotating shaft are also installed in the support frame; a worm wheel and a gear are fixedly connected to the rotating shaft, wherein the worm wheel is meshed with the worm, and the gear is meshed with the toothed plate; the support frame is also fixedly connected to a pitch adjustment motor, and the output end of the pitch adjustment motor is connected to one end of the worm, so as to facilitate the adjustment of the pitch angle of the electrode after being clamped on the top of the movable frame, thereby satisfying the free movement of the electrode during the guiding process in the flow channel.

[0010] The clamping mechanism includes a connection frame, mounting grooves are arranged on both sides of the connection frame, and a holding box is arranged at the mounting grooves; a sliding block is arranged at the mounting groove inside the holding box, an electromagnet is arranged at the end away from the connection frame, a spring is arranged between the sliding block and the electromagnet, and an adsorption block is also arranged on the side of the sliding block opposite to the electromagnet. It is convenient to fully clamp and limit the electrode, avoid displacement or falling off during the guiding process, and improve the stability and reliability of clamping.

[0011] A support plate is fixedly connected inside the X-axis connecting table for supporting the X-axis bidirectional threaded rod and the X-axis limit rod; a groove is provided at the corresponding position of the X-axis connecting table and the X-axis movable block, and the X-axis movable block is slidably connected inside the groove, so as to facilitate more stability during the X-axis adjustment of the electrode.

[0012] Grooves are provided at corresponding positions of the Y-axis connecting platform and the Y-axis movable block, and the Y-axis movable block is slidably connected inside the groove, so as to facilitate more stability during the Y-axis adjustment of the electrode.

[0013] The method for positioning the initial position of the electrode by the positioning device for electrospark shaping of the flow channel of the additively manufactured blade disk comprises the following process:

[0014] Step 1: Connect the mounting frame of the positioning device to the spindle of the CNC machine tool through bolts for fixed limit, and establish the coordinate system OXYZ. When the device is working, the Z-axis direction and distance are adjusted by the spindle driving the device, the angle is rotated by the positioning adjustment mechanism and the angle adjustment mechanism, the x-axis angle and distance are changed by adjusting the X-axis moving stage assembly, and the y-axis angle and distance are changed by adjusting the Y-axis moving stage assembly.

[0015] Step 2, when the electrode just exits the flow channel, record the various values ​​of the device after adjustment, and adjust the angle of the angle adjustment mechanism to 0, set the distance between the center of the mounting frame and the clamping mechanism to z1, the distance between the Y-axis moving stage assembly and the center position of the X-axis moving stage assembly to x1, the distance between the angle adjustment mechanism and the center position of the Y-axis moving stage assembly to y1, and the counterclockwise rotation angle of the adjustment mechanism to θ1. The initial working coordinates after the electrode positioning is completed should be the coordinates adjusted by the device of the present invention combined with the initial coordinates of the spindle, and the initial coordinates of the spindle are set to (x2, y2, z2). Set the initial working coordinates of the electrode positioning to (x0, y0, z0), then:

[0016]

[0017] z0=z2+z1;

[0018] When the adjustment direction of the Y-axis moving platform component is in the same direction as the Y-axis coordinate axis, the sign takes a negative value, otherwise it takes a positive value.

[0019] Step 3, disassemble the device from the spindle of the CNC machine tool, install the electrode on the spindle of the CNC machine tool, operate the CNC machine tool, and move its spindle to the acquired coordinates of the initial position of the electrode;

[0020] Step 4: Execute the relevant electrode trajectory search G code program of the CNC spark machine to complete the subsequent flow channel finishing work.

[0021] The method for locating the initial position of the electrode comprises the following steps:

[0022] In step 2, the electrode enters and exits the flow channel by controlling the machine tool spindle and the device, wherein the device operates by setting the pitch adjustment motor to rotate the worm, and the worm gear meshing transmission makes the rotating shaft rotate together with the gear, and then the gear and the tooth plate meshing makes the tooth plate rotate, so that the movable frame rotates outside the support frame; the setting rotation drive motor operates to rotate the connecting block, so that the limit plate rotates inside the operating table, so that the connecting column rotates; the setting X-direction motor operates to rotate the X-direction bidirectional threaded rod, and cooperates with the X-direction limit rod to move the X-direction movable block; the setting Y-direction motor operates to rotate the Y-direction threaded rod, and cooperates with the Y-direction limit rod to move the Y-direction movable block; the above method drives the clamping mechanism to move.

[0023] Compared with the prior art, the present invention provides a positioning device and method for electrospark shaping of blisk flow passages in additive manufacturing, which has the following beneficial effects:

[0024] 1. The present invention is different from the prior art in that the initial processing position of the electrode is further calculated by finding the benchmark of the blank part, but the initial processing position of the electrode is directly obtained by preliminarily simulating the guiding position of the electrode in the blank flow channel. The working method is to firmly install the blade disk blank in the processing area of ​​the EDM CNC machine tool, and then use the positioning device to clamp the electrode so that the electrode can smoothly enter and reach the terminal position of the blade disk blank flow channel and exit safely. In this process, the precise position of the electrode just after exiting is recorded, and this position is set as the starting reference point when the electrode is officially operating. Then, adjust the spindle of the EDM CNC machine tool to move to this position, then assemble the electrode, and continue to complete subsequent processing tasks. In the process of the electrode exiting the flow channel, the positioning device can actually check whether the electrode has safely exited the flow channel area, and further verify the feasibility of the electrode design work.

[0025] 2. The positioning device for electrospark shaping of the flow channel of the blisk in additive manufacturing has a working principle of rotating the connection block by setting the rotary drive motor of the positioning adjustment mechanism to facilitate uniform rotation partitioning of the electrode, thereby realizing large-angle rotation of the electrode in the positioning working stage and recording the angle value of the rotation. The X-axis direction and recorded value of the electrode in the process of guiding in the flow channel of the blisk are adjusted by setting the X-axis motor of the Y-axis moving table assembly to rotate the Y-axis threaded rod, which is convenient for adjusting the Y-axis direction and recording the value of the electrode in the process of guiding in the flow channel of the blisk. The pitch adjustment motor of the angle adjustment mechanism is set to work, so that the worm is rotated, which is convenient for adjusting the pitch angle of the electrode after clamping at the top of the movable frame, so as to meet the free movement of the electrode in the process of guiding in the flow channel. The electromagnet of the clamping and limiting mechanism is set to work, and the electrode is fully clamped and limited by the spring, so as to avoid the electrode from being offset or falling off during the guiding process, and improve the stability and reliability of the clamping.

[0026] 3. The present invention uses multiple precise mechanical structures to achieve the initial positioning of the electrode in the flow channel of the blade disk blank, further verify the feasibility of the electrode design, obtain the coordinates of the electrode when the electrode just exits the flow channel, and provide the initial coordinates of the electrode for the EDM CNC machine tool to repair the blank flow channel in subsequent work. The reference information of the blade disk blank is obtained by traditional visual image technology, and the initial processing coordinates of the electrode need to be further calculated, and image acquisition, processing and analysis are required. This process may be relatively time-consuming, and the visual image technology may be affected by factors such as light and surface reflection, resulting in a decrease in the accuracy of the obtained blank reference. In this regard, the positioning device of the present invention is driven by a motor, and can quickly adjust the position and angle of the electrode to achieve rapid positioning, which helps to improve processing efficiency and shorten the production cycle; the positioning device of the present invention has multiple adjustable mechanisms, which can adapt to blade disk flow channels of different shapes and sizes, as well as electrodes of different specifications, and has a wide range of applicability and can meet different processing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 labor:

[0028] Figure 1 It is a schematic diagram of the front structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the regulating component of the present invention;

[0030] Figure 3It is a schematic diagram of the structure of the X-axis moving platform assembly of the present invention;

[0031] Figure 4 This is a schematic diagram of the internal structure of the X-axis moving platform assembly of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the Y-axis moving platform assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of the internal structure of the Y-axis moving platform assembly of the present invention;

[0034] Figure 7 This is a schematic diagram of the angle adjustment mechanism structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the internal structure of the angle adjustment mechanism of the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure of the clamping and limiting mechanism of the present invention;

[0037] Fig.10 It is a schematic diagram of the internal structure of the clamping and limiting mechanism of the present invention;

[0038] Fig.11 This is a coordinate system diagram for positioning the initial position of the electrode in the present invention.

[0039] In the figure: 1, operating table; 2, mounting frame; 3, positioning adjustment mechanism; 31, support seat; 32, rotating drive motor; 33, connecting block; 34, limiting plate; 35, connecting column; 4, X-axis moving table assembly; 41, X-axis connecting table; 42, X-axis motor; 43, X-axis movable block; 44, supporting plate; 45, X-axis bidirectional threaded rod; 46, X-axis limiting rod; 5, Y-axis moving table assembly; 51, Y-axis connecting table; 5 2. Y-axis motor; 53. Y-axis movable block; 54. Y-axis threaded rod; 55. Y-axis limit rod; 6. Angle adjustment mechanism; 61. Support frame; 62. Movable frame; 63. Tooth plate; 64. Pitch adjustment motor; 65. Worm; 66. Rotating shaft; 67. Gear; 68. Worm wheel; 7. Clamping limit mechanism; 71. Connecting frame; 72. Pressing box; 73. Electromagnet; 74. Spring; 75. Block; 76. Adsorption block. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Embodiment 1:

[0043] See also Figure 1-4 The present invention provides a technical solution: a positioning device for electrospark shaping of a blisk flow channel in additive manufacturing, which comprises, from top to bottom, a mounting frame 2, a positioning adjustment mechanism 3, an operating table 1, an X-axis moving table assembly 4, a Y-axis moving table assembly 5, an angle adjustment mechanism 6, and a clamping and limiting mechanism 7; wherein the operating table 1 is fixedly connected to the mounting frame 2.

[0044] Furthermore, the positioning adjustment mechanism 3 includes a rotation drive motor 32 installed on the operating table 1 through a support seat 31, and the output end of the rotation drive motor 32 is fixedly connected to a connecting block 33, and the operating table 1 is internally rotatably connected to a limit plate 34, and the bottom of the limit plate 34 is fixedly connected to a connecting column 35, which is convenient for uniform rotation partitioning of the electrode, thereby facilitating the electrode to achieve a large angle of rotation during the positioning working stage, which is conducive to accurately recording the rotation angle value.

[0045] Furthermore, the limiting plate 34 is provided with a positioning groove, and the positioning groove cooperates with the connecting block 33 to facilitate a more stable partitioning process.

[0046] Furthermore, the X-axis moving table assembly 4 includes an X-axis connecting table 41 fixedly connected to the bottom of the connecting column 35, and also includes an X-axis bidirectional threaded rod 45, an X-axis limit rod 46, an X-axis motor 42, and an X-axis movable block 43; wherein the X-axis bidirectional threaded rod 45 and the X-axis limit rod 46 are installed in the cavity in the X-axis connecting table 41; the X-axis motor 42 is installed at the left end or the right end of the X-axis connecting table 41 and the output shaft is connected to one end of the X-axis bidirectional threaded rod 45; the X-axis movable block 43 is installed on the X-axis bidirectional threaded rod 45 and the X-axis limit rod 46, and is threadedly connected to the X-axis bidirectional threaded rod 45, and is slidably connected to the X-axis limit rod 46, so as to facilitate the adjustment of the relative position of the two groups of electrodes, adjust the X-axis orientation of the electrode during the guiding process in the blade disk flow channel, and further effectively record the X-axis value of the initial coordinate after the electrode adjustment is completed.

[0047] Furthermore, a support plate 44 is fixedly connected inside the X-axis connecting platform 41, which is used to support the X-axis bidirectional threaded rod 45 and the X-axis limit rod 46; and grooves are opened at the corresponding positions of the X-axis connecting platform 41 and the X-axis movable block 43, and the X-axis movable block 43 is slidably connected inside the groove, so as to facilitate a more stable adjustment process.

[0048] Embodiment two:

[0049] See also Figure 5-6 , and combined with the first embodiment, it is further obtained that the Y-axis moving platform assembly 5 includes a Y-axis connecting platform 51 fixedly connected to the bottom of the X-axis movable block 43, and also includes a Y-axis threaded rod 54, a Y-axis limiting rod 55, a Y-axis motor 52, and a Y-axis movable block 53; wherein the Y-axis threaded rod 54 and the Y-axis limiting rod 55 are installed in the cavity in the Y-axis connecting platform 51; the Y-axis motor 52 is installed at the front end or the rear end of the Y-axis connecting platform 51 and the output shaft is connected to one end of the Y-axis threaded rod 54; the Y-axis movable block 53 is installed on the Y-axis threaded rod 54 and the Y-axis limiting rod 55, and is threadedly connected to the Y-axis threaded rod 54, and is slidably connected to the Y-axis limiting rod 55, so as to facilitate the adjustment of the Y-axis orientation of the electrode during the guiding process in the leaf disk flow channel, avoid the collision between the electrode and the blade crown, etc. during the guiding process, and further effectively record the Y-axis value of the initial coordinate after the electrode adjustment is completed.

[0050] Furthermore, grooves are provided at corresponding positions of the Y-axis connecting platform 51 and the Y-axis movable block 53, and the Y-axis movable block 53 is slidably connected inside the grooves, so that the adjustment process is more stable.

[0051] Embodiment three:

[0052] See also Figure 7-8 , and combined with the first embodiment and the second embodiment, it is further obtained that the angle adjustment mechanism 6 includes a support frame 61 fixedly connected to the lower part of the Y-axis movable block 53, and a movable frame 62 is hingedly connected to the lower part of the support frame 61, and a toothed plate 63 is fixedly connected to the movable frame 62; wherein a worm 65 and a rotating shaft 66 are also installed in the support frame 61; a worm wheel 68 and a gear 67 are fixedly connected to the rotating shaft 66, wherein the worm wheel 68 meshes with the worm 65, and the gear 67 meshes with the toothed plate 63; the support frame 61 is also fixedly connected to a pitch adjustment motor 64, and the output end of the pitch adjustment motor 64 is connected to one end of the worm 65. It is convenient to adjust the pitch angle of the electrode after being clamped at the top of the movable frame 62, so as to meet the free movement of the electrode during the guiding process in the flow channel.

[0053] Embodiment four:

[0054] See also Figure 9-11, and combined with the first to third embodiments, it is further obtained that the clamping mechanism 7 includes a connecting frame 71, mounting grooves are arranged on both sides of the connecting frame 71, and a holding box 72 is arranged at the mounting groove; a sliding block 75 is arranged at the mounting groove inside the holding box 72, an electromagnet 73 is arranged at the end away from the connecting frame 71, a spring 74 is arranged between the sliding block 75 and the electromagnet 73, and an adsorption block 76 is also installed on the side opposite to the sliding block 75 and the electromagnet 73. It is convenient to fully clamp and limit the electrode, avoid displacement or falling off during the guiding process, and improve the stability and reliability of clamping.

[0055] During the actual operation, when using this device, first of all, a protective cover is set on the outside of the device's motor to avoid accidents such as current interference during use. At the same time, the mounting frame 2 is fixed and limited with the CNC machine tool spindle of the device by bolt connection, and the coordinate system OXYZ is established. It is adjusted according to the different models of the flow channel that needs to be shaped. The staff selects a suitable electrode and places it inside the connecting frame 71. The electromagnet 73 is set to work, and the spring 74 is cooperated to move the adsorption block 76, so that the card block 75 moves, so that the card block 75 passes through the electrode to clamp and limit the electrode. After the clamping is completed, the pitch adjustment motor 64 is set to work to rotate the worm 65, and the worm 65 is meshed through the worm wheel 68 to make the worm 65 mesh. The rotating shaft 66 rotates together with the gear 67, and then the gear 67 and the tooth plate 63 are meshed to rotate the tooth plate 63, so that the movable frame 62 rotates outside the support frame 61, and the rotation drive motor 32 is set to work to rotate the connecting block 33, so that the limit plate 34 rotates inside the operating table 1, so that the connecting column 35 rotates, and the rotation angle of the XOY plane of the electrode is changed. The X-direction motor 42 is set to work to rotate the X-direction bidirectional threaded rod 45, and cooperate with the X-direction limit rod 46 to move the X-direction movable block 43 to change the x-position of the electrode, and the Y-direction motor 52 is set to work to rotate the Y-direction threaded rod 54, and cooperate with the Y-direction limit rod 55 to move the Y-direction movable block 53 to change the y-position of the electrode.

[0056] When the electrode just exits the flow channel, record the various values ​​after the adjustment of the device is completed, and adjust the angle of the angle adjustment mechanism 6 to 0. Assume that the distance between the center of the mounting frame 2 and the clamping mechanism 7 is z1, the distance between the Y-axis moving table assembly 5 and the center position of the X-axis moving table assembly 4 is x1, the distance between the angle adjustment mechanism 6 and the center position of the Y-axis moving table assembly 5 is y1, and the counterclockwise rotation angle of the positioning adjustment mechanism 3 is θ1. Then, the initial working coordinates after the electrode positioning is completed should be the coordinates adjusted by the device of the present invention combined with the initial coordinates of the spindle, and the initial coordinates of the spindle are set to (x2, y2, z2). Assume that the initial working coordinates of the electrode positioning are (x0, y0, z0), then:

[0057]

[0058] z0=z2+z1;

[0059] When the adjustment direction of the Y-axis moving platform component is in the same direction as the Y-axis coordinate axis, the sign takes a negative value, otherwise it takes a positive value.

[0060] The device is disassembled from the spindle of the CNC machine tool, the electrode is installed on the spindle of the CNC machine tool, and the CNC machine tool is operated to move its spindle to the acquired coordinates of the initial position of the electrode.

[0061] Execute the relevant electrode trajectory search G code program of the CNC spark machine to complete the subsequent flow channel finishing work.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A positioning device for electrospark shaping of blisk flow channels in additive manufacturing, characterized in that: The device comprises, from top to bottom, a mounting frame (2), a positioning adjustment mechanism (3), an operating table (1), an X-axis moving table assembly (4), a Y-axis moving table assembly (5), an angle adjustment mechanism (6), and a clamping and limiting mechanism (7); wherein the operating table (1) is fixedly connected to the mounting frame (2); The positioning adjustment mechanism (3) comprises a rotary drive motor (32) mounted on the operating table (1) via a support seat (31); the output end of the rotary drive motor (32) is fixedly connected to a connecting block (33); a limit plate (34) is rotatably connected inside the operating table (1); a connecting column (35) is fixedly connected to the bottom of the limit plate (34); the limit plate (34) is provided with a positioning groove, which cooperates with the connecting block (33); The X-direction moving platform assembly (4) comprises an X-direction connecting platform (41) fixedly connected below the connecting column (35), and also comprises an X-direction bidirectional threaded rod (45), an X-direction limiting rod (46), an X-direction motor (42), and an X-direction movable block (43); wherein the X-direction bidirectional threaded rod (45) and the X-direction limiting rod (46) are installed in a cavity in the X-direction connecting platform (41); the X-direction motor (42) is installed at the left end or the right end of the X-direction connecting platform (41), and the output shaft is connected to one end of the X-direction bidirectional threaded rod (45); the X-direction movable block (43) is installed on the X-direction bidirectional threaded rod (45) and the X-direction limiting rod (46), and is threadedly connected to the X-direction bidirectional threaded rod (45), and is slidably connected to the X-direction limiting rod (46); The Y-direction moving table assembly (5) comprises a Y-direction connecting table (51) fixedly connected to the lower side of the X-direction movable block (43), and also comprises a Y-direction threaded rod (54), a Y-direction limiting rod (55), a Y-direction motor (52), and a Y-direction movable block (53); wherein the Y-direction threaded rod (54) and the Y-direction limiting rod (55) are installed in a cavity in the Y-direction connecting table (51); the Y-direction motor (52) is installed at the front end or the rear end of the Y-direction connecting table (51), and the output shaft is connected to one end of the Y-direction threaded rod (54); the Y-direction movable block (53) is installed on the Y-direction threaded rod (54) and the Y-direction limiting rod (55), and is threadedly connected to the Y-direction threaded rod (54), and is slidably connected to the Y-direction limiting rod (55); The angle adjustment mechanism (6) comprises a support frame (61) fixedly connected to the lower part of the Y-axis movable block (53); a movable frame (62) is hingedly connected to the lower part of the support frame (61); a toothed plate (63) is fixedly connected to the movable frame (62); a worm (65) and a rotating shaft (66) are also installed in the support frame (61); a worm wheel (68) and a gear (67) are fixedly connected to the rotating shaft (66); the worm wheel (68) is meshed with the worm (65), and the gear (67) is meshed with the toothed plate (63); the support frame (61) is also fixedly connected to a pitch adjustment motor (64); an output end of the pitch adjustment motor (64) is connected to one end of the worm (65).

2. The positioning device for electrospark shaping of blisk flow passages in additive manufacturing according to claim 1, characterized in that: The clamping mechanism (7) comprises a connecting frame (71), mounting grooves are arranged on both sides of the connecting frame (71), and a holding box (72) is arranged at the mounting grooves; a sliding block (75) is arranged inside the holding box (72) at the mounting grooves, an electromagnet (73) is arranged at one end away from the connecting frame (71), a spring (74) is arranged between the sliding block (75) and the electromagnet (73), and an adsorption block (76) is also arranged on the side of the sliding block (75) opposite to the electromagnet (73).

3. The positioning device for electrospark shaping of blisk flow passages in additive manufacturing according to claim 1, characterized in that: The X-direction moving table assembly (4) comprises one X-direction connecting table (41), one X-direction bidirectional threaded rod (45), one X-direction limiting rod (46), two X-direction motors (42), and two X-direction movable blocks (43); the two X-direction motors (42) are respectively mounted on the left and right ends of the X-direction connecting table (41), and the output shafts thereof are respectively connected to one end of the X-direction bidirectional threaded rod (45).

4. The positioning device for electrospark shaping of blisk flow passages in additive manufacturing according to claim 1, characterized in that: A support plate (44) is fixedly connected inside the X-direction connecting platform (41) for supporting an X-direction bidirectional threaded rod (45) and an X-direction limiting rod (46); grooves are provided at positions corresponding to the X-direction connecting platform (41) and the X-direction movable block (43), and the X-direction movable block (43) is slidably connected inside the grooves.

5. The positioning device for electrospark shaping of blisk flow passages in additive manufacturing according to claim 1, characterized in that: The Y-direction connecting platform (51) and the Y-direction movable block (53) are provided with grooves at corresponding positions, and the Y-direction movable block (53) is slidably connected inside the grooves.

6. A method for positioning an electrode at an initial position using the positioning device for electrospark shaping of a blisk flow channel in additive manufacturing according to claim 1, comprising the following steps: Step 1: The mounting frame (2) of the positioning device is fixedly limited to the spindle of the CNC machine tool by bolt connection, and the coordinate system OXYZ is established. When the device is working, the Z-axis direction and distance are adjusted by the spindle driving the device, the angle is rotated by the positioning adjustment mechanism (3) and the angle adjustment mechanism (5), the x-axis angle and distance are changed by adjusting the x-axis moving platform assembly (4), and the y-axis angle and distance are changed by adjusting the y-axis moving platform assembly (5). Step 2, when the electrode just exits the flow channel, record the various values ​​after the adjustment of the device is completed, and adjust the angle of the angle adjustment mechanism (6) to 0, set the distance between the center of the mounting frame (2) and the clamping mechanism 7 to be z1, the distance between the Y-axis moving table assembly 5 and the center position of the X-axis moving table assembly (4) to be x1, the distance between the angle adjustment mechanism (6) and the center position of the Y-axis moving table assembly (5) to be y1, the counterclockwise rotation angle of the positioning adjustment mechanism 3 is θ1, then the initial working coordinates after the electrode positioning is completed should be the coordinates adjusted by the device of the present invention combined with the initial coordinates of the main axis, set the initial coordinates of the main axis to (x2, y2, z2), set the initial working coordinates of the electrode positioning to (x0, y0, z0), then: z0=z2+z1; in, When the adjustment direction of the Y-axis moving platform component is in the same direction as the Y-axis coordinate axis, the sign is negative, otherwise it is positive. Step 3: disassemble the device from the spindle of the CNC machine tool, install the electrode on the spindle of the CNC machine tool, operate the CNC machine tool, and move its spindle to the acquired coordinates of the electrode initial position. Step 4: Execute the relevant electrode trajectory search G code program of the CNC spark machine to complete the subsequent flow channel finishing work.

7. The method for locating the initial position of an electrode according to claim 6, comprising the following steps: In step 2, the electrode enters and exits the flow channel by controlling the machine tool spindle and the device, wherein the pitch adjustment motor (64) is set to work to rotate the worm (65), and the worm wheel (68) and the worm (65) are meshed to drive the rotating shaft (66) and the gear (67) to rotate together, and then the gear (67) and the toothed plate (63) are meshed to rotate the toothed plate (63), so that the movable frame (62) rotates outside the support frame (61); the rotation drive motor (32) is set to work, The connecting block (33) is rotated, so that the limiting plate (34) is rotated inside the operating table (1), so that the connecting column (35) is rotated; the X-direction motor (42) is operated to rotate the X-direction bidirectional threaded rod (45), and cooperate with the X-direction limiting rod (46) to move the X-direction movable block (43); the Y-direction motor (52) is operated to rotate the Y-direction threaded rod (54), and cooperate with the Y-direction limiting rod (55) to move the Y-direction movable block (53); the clamping mechanism (7) is driven to move in the above manner.

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