Electrode chuck device for machining turbine blades on light-load EDM machine tool

Abstract

The utility model provides an electrode chuck device for machining turbine blades on a light-load EDM machine tool. The electrode chuck device comprises a first chuck assembly (61) and a second chuck assembly (62) which are separated from each other. The first chuck assembly (61) comprises a first chuck main body (611), and the second chuck assembly (62) comprises a second chuck main body (621); the first chuck main body (611) and the second chuck main body (621) are connecting cross beams extending towards two ends, and two ends of the first chuck main body (611) are respectively used as a first electrode mounting part (6a) for mounting a first electrode (1) and a second electrode mounting part (6b) for mounting a second electrode (2); the two ends of the second chuck main body (621) serve as a third electrode installation part (6c) used for installing a third electrode (3) and a fourth electrode installation part (6d) used for installing a fourth electrode (4) respectively. The chuck weight needed to be borne by machine tool machining is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas turbine blade processing, and in particular relates to an electrode chuck device for processing turbine blades on a light-load EDM machine tool. Background Art

[0002] Turbine blades (vane, also known as guide vanes or stationary blades) are important parts of gas turbines. As the structure forming the turbine nozzle, they are subjected to the impact of high-temperature and high-pressure airflow from the combustion chamber during operation. In order to reduce the temperature of the turbine blades and increase their service life, cooling air channels for cooling air to pass through are usually designed on the turbine blades, including cooling air inlet channels formed at both ends of the turbine blades for the entry of cooling air, cooling air outlet channels formed on the blade profile of the turbine blades, and cooling cavities formed inside the turbine blades.

[0003] The cooling air inlet channels at both ends of the turbine blade can be formed by electrical discharge machining on an EDM (Electrical Discharge Machining) machine. An electrode chuck device is installed on the EDM machine, and a machining electrode is installed on the electrode chuck device. Discharge machining protrusions (such as ribs) are formed at predetermined locations of the machining electrode. When the machining electrode on the electrode chuck approaches the workpiece, pulse spark discharge occurs between the discharge machining protrusion and the workpiece, thereby metal etching can be performed on predetermined locations at both ends of the turbine blade to form cooling air inlet channels of predetermined shape and size.

[0004] Figure 1 A schematic diagram of a processing state of an electrode chuck device in the prior art is shown.

[0005] Two blades V are supported and fixed on the workpiece fixture 5 by a blade bracket, wherein one blade has its first side (e.g., the blade pressure surface PS side, pressure surface) facing upward and is used for processing the cooling air inlet channels at both ends of the first side; the other blade has its second side (e.g., the blade suction surface SS side, suction surface) facing upward and is used for processing the cooling air inlet channels at both ends of the second side.

[0006] The existing electrode chuck device 6 has a chuck body 601 with a roughly square profile, and the chuck body 601 has a chuck connection seat S for connecting to the spindle of the EDM machine tool. Four electrode mounting parts are formed at the four corners of the chuck body 601, namely the first electrode mounting part 6a, the second electrode mounting part 6b, the third electrode mounting part 6c and the fourth electrode mounting part 6d. The four electrodes, namely the first electrode 1, the second electrode 2, the third electrode 3 and the fourth electrode 4, are each mounted to a corresponding electrode mounting part through an electrode bracket 7. Each electrode bracket 7 also includes an electrode height adjustment mechanism 71 for adjusting the height of the corresponding electrode. A rotation positioning mechanism 8 is also provided between each electrode and the corresponding electrode bracket 7 for flipping the electrode up and down.

[0007] The first electrode 1 is a PS-side inner electrode, which is used for machining the cooling air inlet passage along the radial inner side of the blade (relative to the installation state of the blade in the turbine housing) on ​​the PS side of the blade pressure surface.

[0008] The second electrode 2 is a PS-side outer electrode, which is used for machining the cooling air inlet passage along the radial outer side of the blade (relative to the installation state of the blade in the turbine housing) on ​​the PS side of the blade pressure surface.

[0009] The third electrode 3 is an SS-side inner electrode, which is used for machining the cooling air inlet passage along the radial inner part of the blade (relative to the installation state of the blade in the turbine housing) on ​​the SS side of the blade suction surface.

[0010] The fourth electrode 4 is an SS-side outer electrode, which is used for machining the cooling air inlet passage along the radial inner side of the blade (relative to the installation state of the blade in the turbine housing) on ​​the suction surface PS side of the blade.

[0011] Since the electrode chuck device 6 carries four electrodes and processes two blades at the same time, it is relatively heavy and is usually only suitable for installation on large EDM machines. For EDM machines with light spindle loads, it is impossible to carry a heavy-load electrode chuck. Taking AGIE SPIRIT 4L as an example, the spindle of this machine tool was equipped with a C-axis when it was installed. For this type of machine tool, the maximum load of the spindle is only 30Kg. For larger blade parts, the structural size and weight of the electrode chuck used for processing them will be too large, which may be 2 to 3 times the maximum load of the spindle of the machine tool. Obviously, it cannot meet the processing requirements. Therefore, it is necessary to optimize the structure of the electrode chuck according to the actual working conditions so that it can match the machine tool requirements. Utility Model Content

[0012] The technical problem to be solved by the present disclosure is to provide an electrode chuck device for machining turbine blades on a light-load EDM machine tool, so that the electrode chuck device can reduce weight to match the load requirements of the light-load EDM machine tool.

[0013] In order to solve the above technical problems, the present invention provides an electrode chuck device for machining turbine blades on a light-load EDM machine tool, characterized in that: the electrode chuck device includes a first chuck assembly and a second chuck assembly separated from each other; the first chuck assembly includes a first chuck body, and the second chuck assembly includes a second chuck body; the first chuck body and the second chuck body are both connecting beams extending to both ends, and the two ends of the first chuck body respectively serve as a first electrode mounting portion for mounting a first electrode and a second electrode mounting portion for mounting a second electrode 2, and the two ends of the second chuck body respectively serve as a third electrode mounting portion for mounting a third electrode and a fourth electrode mounting portion for mounting a fourth electrode.

[0014] In the present disclosure, the entire electrode chuck device is configured to include two mutually separable first chuck assemblies and a second chuck assembly. Each chuck assembly has a chuck body connected to a crossbeam, so that when a light-load EDM machine tool is used to process a workpiece (turbine blade), only one of the first chuck assembly and the second chuck assembly needs to be installed on the machine tool, which greatly reduces the weight of the chuck required to be carried by the machine tool, thereby reducing the processing load of the EDM machine tool.

[0015] Furthermore, the first chuck body and the second chuck body respectively have an intermediate section located in the middle along their respective length directions, and a chuck connecting seat for connecting to the working head of the EDM head is respectively provided on the upper surface of the intermediate section; the width of the first section extending from the respective intermediate section along the respective length directions to the respective first end and the second section extending to the respective second end on the first chuck body and the second chuck body are respectively smaller than the width of the respective intermediate section.

[0016] In the present disclosure, by making the first chuck body and the second chuck body have different widths in different sections along the length direction, the cross-sectional shapes of the first chuck body and the second chuck body are optimized, and the weight of the first chuck assembly and the second chuck assembly is further reduced.

[0017] Furthermore, it also includes an electrode holder; the electrode holder includes an electrode height adjustment mechanism; wherein only one of the first electrode and the second electrode in the first chuck assembly is mounted on the first chuck body through the electrode holder, while the other is directly mounted on the first chuck body, thereby adjusting the height of the first electrode and the second electrode relative to the other through the electrode height adjustment mechanism; and / or, only one of the third electrode and the fourth electrode in the second chuck assembly is mounted on the second chuck body through the electrode holder, while the other is directly mounted on the second chuck body, thereby adjusting the height of the third electrode and the fourth electrode relative to the other through the electrode height adjustment mechanism.

[0018] In the present disclosure, the motor bracket is capable of adjusting the height of the electrode mounted thereon through an electrode height adjustment mechanism, so that the relative heights of the two electrodes in the first chuck assembly or the second chuck assembly can be adjusted through only one motor bracket so that the two electrodes can simultaneously approach the workpiece to be processed to perform electric spark machining. There is no need to install the two electrodes by configuring electrode brackets at both ends of the first chuck group or the second chuck assembly, thereby simplifying the structure and reducing the weight.

[0019] Furthermore, it also includes a rotation positioning mechanism having a rotation axis extending in a horizontal direction; wherein, any one or both of the first electrode and the second electrode in the first chuck assembly are mounted to the first chuck body through the rotation positioning mechanism, so that the rotation positioning mechanism enables any one or both of the first electrode and the second electrode to rotate 180 degrees around the rotation axis of the rotation positioning mechanism; and / or, any one or both of the third electrode and the fourth electrode in the second chuck assembly are mounted to the second chuck body through the rotation positioning mechanism, so that the rotation positioning mechanism enables any one or both of the third electrode and the fourth electrode to rotate 180 degrees around the rotation axis of the rotation positioning mechanism.

[0020] In the present disclosure, the electrode can be flipped up and down by a rotation positioning mechanism, so that different discharge machining protrusions at the upper and lower ends of the electrode can be conveniently flipped to a discharge machining position facing downward as needed.

[0021] Further, any one of the first electrode and the second electrode in the first chuck assembly is mounted on the rotation positioning mechanism, the rotation positioning mechanism is mounted on the electrode holder, and the electrode holder is mounted on the first chuck body; any one of the third electrode and the fourth electrode in the second chuck assembly is mounted on the rotation positioning mechanism, the rotation positioning mechanism is mounted on the electrode holder, and the electrode holder is mounted on the second chuck body.

[0022] In the present disclosure, by installing a certain electrode on the corresponding chuck body through the rotation positioning mechanism and the electrode holder in sequence, the electrode can be turned upside down and adjusted in height up and down, and the implementation structure is compact.

[0023] Further, the first chuck body and / or the second chuck body are made of a lightweight metal material having a density less than that of iron.

[0024] In the present disclosure, by using a light metal material to manufacture the first chuck body and / or the second chuck body, the weight of the first chuck assembly and / or the second chuck assembly can be further reduced. More preferably, the light metal material is AlMg4.5Mn0.7. Using AlMg4.5Mn0.7 to manufacture the first chuck body and / or the second chuck body can not only ensure the strength of the chuck body, but also significantly reduce the weight.

[0025] Furthermore, a first weight-reducing recess is provided on the lower surface of the first chuck body and / or the second chuck body.

[0026] In the present disclosure, the weight of the corresponding electrode clamp assembly can be further reduced by providing the first weight-reducing recess.

[0027] Furthermore, the first chuck assembly further includes the first electrode and the second electrode, and the second chuck assembly further includes the third electrode and the second electrode; any one or more of the first electrode, the second electrode, the third electrode and the fourth electrode are provided with a second weight-reducing recess.

[0028] In the present disclosure, the weight of the relevant electrode can be further reduced by providing a second weight-reducing recess.

[0029] Further, the first chuck body and / or the second chuck body is made of a hollow tubular material extending along the length direction.

[0030] In the present disclosure, by using a hollow tubular material to manufacture the first chuck body and / or the second chuck body, the weight of the first chuck assembly and / or the second chuck assembly can be further reduced.

[0031] Further, the hollow tubular material is a rectangular profile, and the end faces of one end and / or both ends of the hollow tubular material form a predetermined angle relative to the longitudinal axis of the hollow tubular material; a process reference block is welded on the outer peripheral surface of one end or both ends of the hollow tubular material, and at least one surface of the process reference block forms a reference surface. For example, the surface of the process reference block facing the corresponding end of the hollow tubular material forms a reference surface, and the reference surface is parallel to the end face of the corresponding end of the hollow tubular material or is located in the plane where the end face of the corresponding end is located.

[0032] In the present disclosure, by making the end faces of one or both ends of the hollow tubular material form a desired predetermined angle relative to the longitudinal axis, the electrode installed at one or both ends of the first chuck body and / or the second chuck body formed by the hollow tubular material can be easily made to form a desired predetermined angle relative to the first chuck body and / or the second chuck body, so that it can be flexibly adapted to blade structures to be processed in various shapes or orientations, thereby having better adaptability. Moreover, in the present disclosure, generally speaking, the dimensional accuracy of the profile is difficult to meet the use requirements. In order to simplify the processing process, a process reference block can be welded around a rectangular material (such as a square tube), and a rough reference and a fine reference can be provided through the reference surface of the process reference block, and all mechanical processing, assembly and measurement processes of the overall structure can be performed in this way. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0034] Figure 1 It is a three-dimensional schematic diagram of a processing state of an electrode chuck device in the prior art;

[0035] Figure 2 It is a three-dimensional schematic diagram of a processing state of an electrode chuck device disclosed in the present invention;

[0036] Figure 3 yes Figure 2 The bottom view of the electrode chuck device of the present invention is shown;

[0037] Figure 4 It is a schematic diagram of an optimization route for structural optimization of an electrode chuck device using the solution disclosed in the present invention;

[0038] Figure 5A and Figure 5B It is a three-dimensional structural schematic diagram of a first chuck assembly and a second chuck assembly of an electrode chuck device according to another embodiment of the present disclosure, in which corresponding electrodes have been installed.

[0039] Figure 6 yes Figure 5A and 5B A schematic three-dimensional structure diagram of a hollow tubular material used to form a first chuck body and a second chuck body in the illustrated embodiment.

[0040] Description of Figure Numbers:

[0041] 1. A first electrode; 2. a second electrode; 3. The third electrode; 4. The fourth electrode; 5. Workpiece fixture; 51. A first workpiece fixture; 52. A second workpiece fixture; 6. Electrode chuck device; 601, chuck body; 602, process reference block; 61. A first chuck assembly; 611, first chuck body; 62. A second chuck assembly; 621, second chuck body; 6a, first electrode mounting portion; 6b, second electrode mounting portion; 6c, third electrode mounting portion; 6d, fourth electrode mounting portion; 7. Electrode holder; 71. Electrode height adjustment mechanism; 8. Rotation positioning mechanism; P. EDM protrusion PS, blade pressure surface; R1, the first weight loss concave part; R2, second weight-reducing recess; S, chuck connection seat; SS, blade suction surface; T, hollow tubular material; V. Leaves. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0044] Figure 2 is a three-dimensional schematic diagram of a processing state of an electrode chuck device disclosed in the present invention, Figure 3 yes Figure 2 The bottom view of the electrode chuck device of the present invention is shown.

[0045] See also Figure 3 The present invention provides an electrode chuck device 6 for machining turbine blades on a light-load EDM machine tool. The electrode chuck device 6 includes a first chuck assembly 61 and a second chuck assembly 62 that are separated from each other. The first chuck assembly 61 is used to perform electrospark machining on a blade V (whose blade pressure surface PS faces upward) fixed on a first workpiece fixture 51, and the second chuck assembly 62 is used to perform electrospark machining on a blade V (whose blade suction surface SS faces upward) fixed on a second workpiece fixture 52.

[0046] The first chuck assembly 61 includes a first chuck body 611, and the second chuck assembly 62 includes a second chuck body 621. The first chuck body 611 and the second chuck body 621 are both connecting beams extending to both ends, and are used to install and connect corresponding electrodes. The two ends of the first chuck body 611 are respectively used as a first electrode mounting portion 6a for mounting the first electrode 1 and a second electrode mounting portion 6b for mounting the second electrode 2, and the two ends of the second chuck body 621 are respectively used as a third electrode mounting portion 6c for mounting the third electrode 3 and a fourth electrode mounting portion 6d for mounting the fourth electrode 4.

[0047] In the present disclosure, the entire electrode chuck device is configured to include two mutually separable first chuck assemblies 61 and second chuck assemblies 62. Each chuck assembly has a chuck body connected to a crossbeam, so that when a light-load EDM machine tool is used to process a workpiece (turbine blade), only one of the first chuck assembly 61 and the second chuck assembly 62 needs to be installed on the machine tool, which greatly reduces the weight of the chuck required to be carried by the machine tool for processing, thereby reducing the processing load of the EDM machine tool.

[0048] Continue to see Figure 2 It can be seen that the first chuck body 611 and the second chuck body 621 respectively have a middle portion located in the middle along their respective length directions, and a chuck connection seat S for connecting to the working head of the EDM machine head is respectively provided on the upper surface of the middle section. Figure 3 It can be seen that the widths of the first sections extending from their respective middle sections along their respective length directions to their respective first ends and the second sections extending to their respective second ends on the first chuck body 611 and the second chuck body 621 are respectively smaller than the widths of their respective middle sections.

[0049] In the present disclosure, by making the first chuck body 611 and the second chuck body 621 have different widths in different sections along the length direction, the cross-sectional shapes of the first chuck body 611 and the second chuck body 621 are optimized, and the weight of the first chuck assembly 61 and the second chuck assembly 62 is further reduced.

[0050] Continue to see Figure 2 See also Figure 3It can be seen that the first chuck assembly 61 and the second chuck assembly each further include an electrode holder 7; the electrode holder 7 includes an electrode height adjustment mechanism 71. In this embodiment, only one of the first electrode 1 and the second electrode 2 in the first chuck assembly 61 is mounted on the first chuck body 611 through the electrode holder 7, while the other is directly mounted on the first chuck body 611, so that the height of one of the first electrode 1 and the second electrode 2 relative to the other is adjusted by the electrode height adjustment mechanism 71. Similarly, only one of the third electrode 3 and the fourth electrode 4 in the second chuck assembly 62 is mounted on the second chuck body 621 through the electrode holder 7, while the other is directly mounted on the second chuck body 621, so that the height of one of the third electrode 3 and the fourth electrode 4 relative to the other is adjusted by the electrode height adjustment mechanism 71.

[0051] In the present disclosure, the electrode holder 7 is capable of adjusting the height of the electrode mounted thereon through the electrode height adjustment mechanism 71, so that the relative heights of the two electrodes in the first chuck assembly 61 or the second chuck assembly 62 can be adjusted by only one electrode holder 7 so that the two electrodes can simultaneously approach the workpiece to be processed to perform electric spark machining. There is no need to install the two electrodes by configuring electrode holders 7 at both ends of the first chuck assembly 61 or the second chuck assembly 62, thereby simplifying the structure and reducing the weight.

[0052] It can be known that, in specific implementation, as required, either or both of the first chuck assembly 61 and the second chuck assembly can be provided with an electrode support 7 with an electrode height adjustment mechanism 71 .

[0053] In the present disclosure, preferably, the first chuck body 611 and / or the second chuck body 621 are made of a lightweight metal material having a density less than that of iron. In the present disclosure, by using a lightweight metal material to manufacture the first chuck body 611 and / or the second chuck body 621, the weight of the first chuck assembly 61 and / or the second chuck assembly 62 can be further reduced.

[0054] More preferably, the light metal material is AlMg4.5Mn0.7. Using AlMg4.5Mn0.7 to manufacture the first chuck body 611 and / or the second chuck body 621 can ensure the strength of the chuck body and significantly reduce the weight.

[0055] See also Figure 3 It can be seen that the lower surface of the first chuck body 611 and / or the second chuck body 621 is provided with a first weight-reducing recess R1. Preferably, the middle section, the first section and the second section of the lower surface of the first chuck body 611 and / or the second chuck body 621 are each provided with a first weight-reducing recess R1.

[0056] In the present disclosure, the weight of the corresponding electrode chuck assembly can be further reduced by providing the first weight-reducing recess R1 .

[0057] Figure 4 It is a schematic diagram of an optimization route for structural optimization of an electrode chuck device using the solution disclosed in the present invention.

[0058] See also Figure 4 It can be seen that the structural optimization of the electrode clamp device disclosed in the present invention is divided into two steps.

[0059] The first optimization step S1 is to split the structure of the whole electrode chuck device 6 into two separate individuals, namely the first chuck assembly 61 and the second chuck assembly 62, which are used to perform electrospark machining on the blade pressure surface PS side and the blade suction surface SS side respectively. In the first optimization step S1, the cross-sections of each section of the first chuck body 611 and the second chuck body 621 along the length direction are also optimized, so that the weight of the first section and the second section is further reduced relative to the weight of the middle section.

[0060] The second optimization step S2 is to replace the main material of each individual on the basis of splitting into two separate individuals, and use a lighter main material. For example, the material of the original integral electrode chuck body 601, such as X42Cr13, is replaced with the material used by the two separate first chuck bodies 611 and second chuck bodies 621, such as AlMg4.5Mn0.7, the former has a density of about 7.8g / cm3, and the latter has a density of about 2.730 g / cm3, which further greatly reduces the weight of the electrode chuck device. In the second optimization step S2, the first chuck body 611 and the second chuck body 621 are further topologically optimized, and the first weight-reducing recess R1 is designed in the middle section and the first and second sections respectively, thereby further reducing the weight of each electrode chuck assembly.

[0061] The optimization plan went through the process of overall transformation and decomposition, material replacement and topology optimization. During the structural analysis of the main structure - the electrode chuck connecting beam, the question of how to remove more material and obtain sufficiently high structural strength and stability was put before us.

[0062] After searching for topology optimization results, the present disclosure further proposes an implementation method of using hollow tubular materials to make connecting beams. Figure 5A and 5B as well as Figure 6 The embodiment shown.

[0063] Figure 5A and 5BA schematic three-dimensional structure diagram of a first chuck assembly and a second chuck assembly of an electrode chuck device according to another embodiment of the present disclosure is shown, wherein the connecting beam (the first chuck body 611 and the second chuck body 621) has been installed with corresponding electrodes. Figure 6 yes Figure 5A and 5B A schematic three-dimensional structure diagram of a hollow tubular material used to form a first chuck body and a second chuck body in the illustrated embodiment.

[0064] In this embodiment, the first chuck body 611 and / or the second chuck body 621 are made of a hollow tubular material T extending in the length direction.

[0065] In the present disclosure, by using the hollow tubular material T to manufacture the first chuck body 611 and / or the second chuck body 621 , the weight of the first chuck assembly 61 and / or the second chuck assembly 62 can be further reduced.

[0066] Preferably, a rectangular hollow steel section (such as a square tube, such as Figure 6 As shown in the figure, this hollow tubular structure may achieve a large amount of weight reduction, and the steel structure has the advantages of light weight, excellent mechanical properties and superior performance, high structural stability and easy machining.

[0067] Further, see Figure 5A and 5B In this embodiment, the end surfaces of one end and / or both ends of the hollow tubular material T form a predetermined angle with respect to the longitudinal axis of the hollow tubular material T. For example, as shown in the figure, the end surface of one end of the first chuck body 611 is perpendicular to the longitudinal axis, and the end surface of the other end forms a non-perpendicular angle with the longitudinal axis, and the second chuck body 621 is also the same.

[0068] A process reference block 602 is welded on the outer circumferential surface of one or both ends of the hollow tubular material T, and at least one surface of the process reference block 602 forms a reference surface. For example, the surface of the process reference block 602 facing the corresponding end of the hollow tubular material T forms a reference surface, and the reference surface is parallel to the end surface of the corresponding end of the hollow tubular material T or is located in the plane where the end surface of the corresponding end is located.

[0069] It can be understood that in the present disclosure, by making the end surface of one or both ends of the hollow tubular material form a desired predetermined angle relative to the longitudinal axis, the electrode installed at one or both ends of the first chuck body and / or the second chuck body formed by the hollow tubular material can be easily made to form a desired predetermined angle relative to the first chuck body and / or the second chuck body, so that it can be flexibly adapted to blade structures to be processed in various shapes or orientations, thereby having better adaptability. Moreover, in the present disclosure, generally speaking, the dimensional accuracy of the profile is difficult to meet the use requirements. In order to simplify the processing process, a process reference block can be welded around a rectangular material (such as a square tube), and a rough reference and a fine reference can be provided through the reference surface of the process reference block, and all mechanical processing, assembly and measurement processes of the overall structure can be performed in this way.

[0070] Continue to see Figure 5A and 5B In this embodiment, the electrode chuck device 6 further includes a rotation positioning mechanism 8 having a rotation axis extending in the horizontal direction; wherein, any one or both of the first electrode 1 and the second electrode 2 in the first chuck assembly 61 are mounted on the first chuck body 611 through the rotation positioning mechanism 8, so that any one or both of the first electrode 1 and the second electrode 2 can be rotated 180 degrees around the rotation axis of the rotation positioning mechanism 8 through the rotation positioning mechanism 8. Any one or both of the third electrode 3 and the fourth electrode 4 in the second chuck assembly 62 are mounted on the second chuck body 621 through the rotation positioning mechanism 8, so that any one or both of the third electrode 3 and the fourth electrode 4 can be rotated 180 degrees around the rotation axis of the rotation positioning mechanism 8 through the rotation positioning mechanism 8.

[0071] In the present disclosure, the electrode can be flipped up and down by the rotation positioning mechanism 8, so that the different discharge machining protrusions at the upper and lower ends of the electrode can be conveniently flipped to the discharge machining position facing downward as needed.

[0072] from Figure 5A It can also be seen that any one of the first electrode 1 and the second electrode 2 in the first chuck assembly 61 is mounted on the rotation positioning mechanism 8, the rotation positioning mechanism 8 is mounted on the electrode holder 7, and the electrode holder 7 is mounted on the first chuck body 611. Similarly, any one of the third electrode 3 and the fourth electrode 4 in the second chuck assembly 62 is mounted on the rotation positioning mechanism 8, the rotation positioning mechanism 8 is mounted on the electrode holder 7, and the electrode holder 7 is mounted on the second chuck body 621.

[0073] Therefore, it can be known that any one of the first electrode and the second electrode in the first chuck assembly can be mounted on the first chuck body through both the electrode holder and the rotation positioning mechanism. During assembly, the first electrode 1 in the first chuck assembly 61 can be first mounted on the rotation positioning mechanism 8, then mounted on the electrode holder 7 through the rotation positioning mechanism 8, and then mounted on the first chuck body 611 through the electrode holder 7. Similarly, the third electrode 3 in the second chuck assembly 62 is also mounted on the second chuck body 621 through the rotation positioning mechanism 8 and the electrode holder 7 in sequence.

[0074] In the present disclosure, by installing a certain electrode on the corresponding chuck body through the rotation positioning mechanism 8 and the electrode holder 7 in sequence, the electrode can be turned upside down and adjusted in height up and down, and its implementation structure is compact.

[0075] Continue to see Figure 5A and 5B The first chuck assembly 61 further includes a first electrode 1 and a second electrode 2, and the second chuck assembly 62 further includes a third electrode 3 and a fourth electrode 4, that is, in the present disclosure, the electrodes can be used as part of the chuck assembly. Figure 5A and 5B It can be seen that any one or more of the first electrode 1 , the second electrode 2 , the third electrode 3 and the fourth electrode 4 are provided with a second weight-reducing recess R2 .

[0076] In the present disclosure: by providing the second weight-reducing recess R2, the weight of the relevant electrode can be further reduced, thereby further reducing the weight of the first chuck assembly and / or the second chuck assembly, and better meeting the load requirements of the light-load EDM machine tool.

[0077] The present disclosure has the following technical effects (especially the technical effects brought about by the improved points).

[0078] The original existing processing plan uses an integral chuck solution for processing two blades at the same time. However, since the mass of the electrode chuck of the integral structure is too large, the spindle of the light-loaded machine tool cannot bear the mass of 81.78Kg. Therefore, the original plan cannot be actually processed on the light-loaded EDM machine tool.

[0079] After the original integral chuck was split, the products that were originally processed simultaneously were divided into two parts for separate processing. In order to further reduce the weight of the single chuck obtained after the split, so as to better meet the requirements of the machine tool load, the single chuck was replaced with lightweight materials again and the corresponding topology optimization was performed to reduce weight, and the lightweight effect was more obvious.

[0080] In order to further reduce the weight of a single chuck and obtain a larger safety processing margin to further reduce the risk of machine tool processing, the hollow tube structure (square tube structure) is used to replace the solid material in the aforementioned solution, so that the final chuck weight reduction effect is very obvious. The total weight of the electrode chuck and the electrode meets the safe operating range of the light-load EDM machine spindle. At the same time, the lightweight electrode and electrode chuck can give full play to the high-efficiency parameters of the machine tool electrical processing, making the processing efficient and the quality stable, achieving the process improvement purpose of improving quality and efficiency.

[0081] The above are only preferred embodiments of the present disclosure. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. An electrode chuck device (6) for machining turbine blades on a light-load EDM machine tool, characterized in that: The electrode chuck device (6) comprises a first chuck component (61) and a second chuck component (62) which are separated from each other; The first chuck assembly (61) comprises a first chuck body (611), and the second chuck assembly (62) comprises a second chuck body (621); The first chuck body (611) and the second chuck body (621) are both connecting beams extending towards two ends, the two ends of the first chuck body (611) respectively serving as a first electrode mounting portion (6a) for mounting a first electrode (1) and a second electrode mounting portion (6b) for mounting a second electrode (2), and the two ends of the second chuck body (621) respectively serving as a third electrode mounting portion (6c) for mounting a third electrode (3) and a fourth electrode mounting portion (6d) for mounting a fourth electrode (4).

2. The electrode chuck device (6) according to claim 1, characterized in that: The first chuck body (611) and the second chuck body (621) respectively have a middle section located in the middle along their respective length directions, and a chuck connection seat (S) for connecting to the working head of the EDM machine tool is respectively provided on the upper surface of the middle section; The widths of the first sections extending from the respective middle sections along the respective length directions to the respective first ends and the second sections extending to the respective second ends on the first chuck body (611) and the second chuck body (621) are respectively smaller than the width of the respective middle sections.

3. The electrode chuck device (6) according to claim 1, characterized in that: It also includes an electrode support (7); the electrode support (7) includes an electrode height adjustment mechanism (71); wherein only one of the first electrode (1) and the second electrode (2) in the first chuck assembly (61) is mounted on the first chuck body (611) via the electrode holder (7), while the other is directly mounted on the first chuck body (611), so that the height of the first electrode (1) and the second electrode (2) relative to the other is adjusted by the electrode height adjustment mechanism (71); and / or, only one of the third electrode (3) and the fourth electrode (4) in the second chuck assembly (62) is mounted on the second chuck body (621) via the electrode holder (7), while the other is directly mounted on the second chuck body (621), so that the height of the third electrode (3) and the fourth electrode (4) relative to the other is adjusted by the electrode height adjustment mechanism (71).

4. The electrode chuck device (6) according to claim 3, characterized in that: It also includes a rotation positioning mechanism (8) having a rotation axis extending in a horizontal direction; in, Any one or both of the first electrode (1) and the second electrode (2) in the first chuck assembly (61) are mounted on the first chuck body (611) via the rotational positioning mechanism (8), so that any one or both of the first electrode (1) and the second electrode (2) can be rotated 180 degrees around the rotation axis of the rotational positioning mechanism (8) via the rotational positioning mechanism (8); and / or, Any one or both of the third electrode (3) and the fourth electrode (4) in the second chuck assembly (62) are mounted on the second chuck body (621) via the rotational positioning mechanism (8), so that any one or both of the third electrode (3) and the fourth electrode (4) can be rotated 180 degrees around the rotation axis of the rotational positioning mechanism (8) via the rotational positioning mechanism (8).

5. The electrode chuck device (6) according to claim 4, characterized in that: Any one of the first electrode (1) and the second electrode (2) in the first chuck assembly (61) is mounted on the rotation positioning mechanism (8), the rotation positioning mechanism (8) is mounted on the electrode holder (7), and the electrode holder (7) is mounted on the first chuck body (611); Any one of the third electrode (3) and the fourth electrode (4) in the second chuck assembly (62) is mounted on the rotation positioning mechanism (8), the rotation positioning mechanism (8) is mounted on the electrode holder (7), and the electrode holder (7) is mounted on the second chuck body (621).

6. The electrode chuck device (6) according to claim 2, characterized in that: The first chuck body (611) and / or the second chuck body (621) are made of a lightweight metal material having a density less than that of iron.

7. The electrode chuck device (6) according to any one of claims 1 to 6, characterized in that: A first weight-reducing recess (R1) is provided on the lower surface of the first chuck body (611) and / or the second chuck body (621).

8. The electrode chuck device (6) according to any one of claims 1 to 6, characterized in that: The first chuck assembly (61) further comprises the first electrode (1) and the second electrode (2), and the second chuck assembly (62) further comprises the third electrode (3) and the fourth electrode (4); Any one or more of the first electrode (1), the second electrode (2), the third electrode (3) and the fourth electrode (4) is provided with a second weight-reducing recess (R2).

9. The electrode chuck device (6) according to claim 8, characterized in that: The first chuck body (611) and / or the second chuck body (621) are made of a hollow tubular material (T) extending in a length direction.

10. The electrode chuck device (6) according to claim 9, characterized in that: The hollow tubular material (T) is a rectangular profile, and the end surfaces of one end and / or both ends of the hollow tubular material (T) form a predetermined angle with respect to the longitudinal axis of the hollow tubular material (T); A process reference block (602) is welded on the outer peripheral surface of one or both ends of the hollow tubular material (T), and at least one surface of the process reference block (602) forms a reference surface.

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