Electrode chucking device and method for electro discharge machine

Abstract

The application relates to the technical field of electrode clamping of an electric spark machine, in particular to an electrode clamping device and method of an electric spark machine. The electrode clamping device of the electric spark machine comprises a chuck and a conductive seat which are fixedly connected through a fixing base and coaxially arranged in an upper and lower position. The inside of the fixing base is provided with a scraping plate which can horizontally move laterally at the bottom of the conductive seat and a driving plate which can vertically ascend and descend at the side of the conductive seat. The plate surface of the driving plate is parallel to the lateral moving direction of the scraping plate. When an electrode rod is inserted from the bottom of the chuck and gradually approaches the conductive seat, the driving plate converts the ascending movement of the electrode rod into the horizontal lateral movement of the scraping plate to scrape the bottom end surface of the conductive seat. The scraping plate scrapes the bottom end surface of the conductive seat once every time the electrode rod is installed, so that the electrode rod can be stably electrically connected with the conductive seat every time.

Description

Technical Field

[0001] This invention relates to the field of electrode clamping technology for electrical discharge machines, specifically to an electrode clamping device and clamping method for electrical discharge machines. Background Technology

[0002] Electrical discharge machining (EDM) machines are widely used in the manufacture of various metal molds and mechanical equipment. EDM is a special machining method that uses the electro-erosion effect generated by pulsed discharge between two electrodes immersed in a working fluid to remove conductive materials; it is also known as electrical discharge machining or electro-erosion machining.

[0003] When using an EDM machine, it is necessary to select the appropriate electrode rod according to the actual situation. Therefore, current EDM machines all use quick-release chucks to clamp the electrode rod.

[0004] For example, Chinese utility model patent CN104985265B discloses a portable EDM machine, mainly including a magnetic base 25, a vertical pole 24, a horizontal angle crossbar 16, a main working head, and a control box 26. The main working head also includes a DC motor 2, bearings, a lead screw 7, and a limit assembly. The limit assembly includes one or more limit switches 18 fixed to a limit switch fixing plate 17. The control of the limit switches is connected to the control circuit of the control box. The lead screw has an inner sleeve 19, which passes through a sealing gasket 11 and a motor chuck connecting post 12. The motor chuck connecting post 12 is fixedly connected to an electrode chuck 13, which is connected to the negative terminal of the power supply of the control box 26. The positive terminal of the power supply of the control box 26 is connected to the workpiece being processed. The main working head is controlled by the power switch of the control box 26. The advantages of this invention are: replacing the original working head with a new one results in high processing accuracy, low vibration, fine holes, convenient installation and debugging, and a secure fit.

[0005] In the above technical solution, the electrode rod is installed by direct insertion. Specifically, the electrode rod is inserted into the electrode clamp 13 from the bottom end of the electrode clamp 13. After the electrode rod is connected to the negative terminal of the power supply, the electrode clamp 13 locks the electrode rod to complete the installation and fixation of the electrode rod.

[0006] This installation method has the following drawbacks: Firstly, the electrode rod needs to be removed for storage and protection when not in use. During this process, dust may adhere to the negative terminal of the power supply, preventing the electrode rod from making close contact with the negative terminal of the power supply the next time it is used, resulting in poor contact. Secondly, during operation, because the electrode rod cannot make close contact with the negative terminal of the power supply the next time it is used, the end connected to the power supply may experience "sparking," resulting in solid residues on the electrode rod and the negative terminal of the power supply. The residues on the electrode rod end can be cleaned after removal, but the residues remaining on the negative terminal of the power supply (that is, inside the electrode clamp) cannot be cleaned and are difficult to detect, which will cause inconvenience for subsequent installation of the electrode rod and prevent the electrode rod from connecting to the power supply. Summary of the Invention

[0007] The purpose of this invention is to provide an electrode clamping device and clamping method for an electrical discharge machine, so as to solve the problems mentioned in the background art.

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

[0009] An electrode clamping device for an EDM machine includes a chuck and a conductive seat that are fixedly connected by a fixed base and are coaxially arranged at the top and bottom. The fixed base is provided with a scraper that can move horizontally at the bottom of the conductive seat and a drive plate that can be vertically raised and lowered at the side of the conductive seat.

[0010] The surface of the drive board is parallel to the lateral movement direction of the scraper.

[0011] As the electrode rod is inserted from the bottom of the chuck and gradually approaches the conductive base, the drive plate converts the upward movement of the electrode rod into a horizontal movement of the scraping plate to scrape the bottom surface of the conductive base.

[0012] Preferably, the drive plate includes a vertical plate and an inclined rail fixedly connected to the side of the vertical plate near the scraper plate, and the scraper plate is slidably connected to the inclined rail by a slider.

[0013] Preferably, a connecting rod extending to the bottom of the vertical plate is fixed thereon, and a receiving groove for accommodating the connecting rod is formed on the lower surface of the conductive base.

[0014] The electrode rod pushes the vertical plate upward through the connecting rod.

[0015] Preferably, the scraper includes a horizontally arranged plate body and two second spring plates, which are respectively fixed to two ends of the plate body in the lateral direction;

[0016] The upper surface of the plate is provided with a scraping opening, and the length of the scraping opening in the direction perpendicular to the transverse direction of the plate is greater than the diameter of the bottom surface of the conductive base;

[0017] The scraper is horizontally slidably connected to the fixed seat via a clutch mechanism.

[0018] Preferably, a square frame is integrally formed on the lower surface of the plate, and a base plate is detachably installed at the bottom end of the square frame. The square frame and the base plate together form a recycling trough with a sealed bottom and a top end connected to the scraping opening.

[0019] Preferably, the fixing base includes a housing and an insulating base that are fixedly connected, and the conductive base is mounted on the insulating base;

[0020] The clutch mechanism includes a slide groove formed on the side of the insulating seat and arranged along the lateral movement direction of the scraper, and a partition block fixed inside the slide groove.

[0021] The dividing block divides the slide into an upper groove and a lower groove. The two ends of the upper groove are connected to the two ends of the lower groove through vertical grooves. Spring inclined plates are installed inside both vertical grooves.

[0022] Preferably, the scraper further includes a connecting plate, which is slidably connected inside the groove via a round shaft.

[0023] Preferably, the connecting plate is fixedly connected to the second spring plate via a first spring plate.

[0024] A clamping method for an EDM electrode clamping device, based on the aforementioned EDM electrode clamping device, specifically includes the following steps:

[0025] S1. Insert the electrode rod from the bottom of the chuck and move it upwards, so that the top of the electrode rod gradually approaches the bottom surface of the conductive base.

[0026] S2. During the upward movement of the electrode rod, the vertical plate will be pushed to slide vertically upward through the connecting rod. With the cooperation of the inclined rail and the slider, the scraper plate can be driven to move horizontally to scrape away the impurities on the bottom surface of the conductive seat.

[0027] S3. After the top of the electrode rod contacts the bottom surface of the conductive base, clamp the electrode rod with the chuck.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This invention utilizes a horizontally movable scraper to remove dust and other impurities adsorbed on the bottom surface of the conductive base, or residues caused by "arcing" on the bottom surface of the conductive base. This ensures the smoothness and flatness of the bottom surface of the conductive base, guaranteeing electrical connection between the electrode rod and the conductive base and preventing poor contact. Furthermore, the drive plate directly converts the vertical insertion movement of the electrode rod into the horizontal movement of the scraper during installation, eliminating the need for manual adjustment of the scraper's position. Each time an electrode rod is installed, the scraper scrapes the bottom surface of the conductive base, preventing any missed areas and ensuring a stable electrical connection between the electrode rod and the conductive base each time. Simultaneously, the drive plate can also assess the smoothness of the bottom surface of the conductive base. If the electrode rod does not make smooth contact with the conductive base, i.e., if the electrode rod is not inserted deeply enough from the bottom of the chuck, it indicates that the scraper has not effectively removed residues from the bottom surface of the conductive base, improving the overall safety of the EDM machine.

[0030] The present invention, through the design of the scraping opening, can achieve multiple scraping of the bottom surface of the conductive base as the plate slides over it, ensuring that stubborn residues can be completely scraped off. At the same time, the scraping opening also improves the structural strength of the plate and prevents the plate from bending and deforming during the scraping process.

[0031] On the one hand, the presence of the frame can improve the overall structural strength of the plate and prevent the plate from bending and deforming during the scraping of the bottom surface of the conductive base. On the other hand, the recycling tank can collect the impurities scraped off from the bottom surface of the conductive base and prevent them from falling onto the top surface of the electrode rod located directly below the conductive base, ensuring the cleanliness of the top surface of the electrode rod during installation, which is more conducive to the electrical connection between the electrode rod and the conductive base.

[0032] The present invention, through the clutch mechanism, can raise the height of the plate during the installation of the electrode rod, and then, with the action of the second spring plate, allow the plate to slide under a certain pressure across the bottom surface of the conductive base to scrape away impurities from the bottom surface of the conductive base. Alternatively, it can lower the height of the plate during the removal of the electrode rod, so that the plate can smoothly return to its initial position for scraping the bottom surface of the conductive base again when the electrode rod is installed next time. Attached Figure Description

[0033] Figure 1 This is a front view structural diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the internal structure of the fixing base of the present invention;

[0035] Figure 3 For the present invention Figure 2 A partial frontal view of the structure;

[0036] Figure 4 This is a schematic diagram of the inclined rail structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of the scraper plate of the present invention;

[0038] Figure 6 This is a cross-sectional view of the plate body of the present invention;

[0039] Figure 7 This is a schematic diagram of the clutch mechanism of the present invention;

[0040] Figure 8 This is a side view of the clutch mechanism of the present invention.

[0041] Figure 9 This is a side view of the vertical plate structure of the present invention.

[0042] In the picture:

[0043] 1. Fixing base; 11. Outer shell; 12. Insulating base;

[0044] 2. Clamp;

[0045] 3. Electrode rods;

[0046] 4. Conductive base; 41. Receiving groove;

[0047] 5. Scraper blade; 51. Blade body; 511. Scraper opening; 512. Square frame; 513. Recycling trough; 514. Base plate; 52. Connecting plate; 521. Round shaft; 53. First spring plate; 54. Second spring plate;

[0048] 6. Drive board; 61. Vertical plate; 62. Inclined rail; 63. Slider; 64. Connecting rod;

[0049] 7. Clutch mechanism; 71. Slide groove; 72. Separator block; 73. Upper groove; 74. Lower groove; 75. Spring slant plate. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Please see Figure 1-9 The present invention provides a technical solution:

[0052] The electrode clamping device for an EDM machine includes a chuck 2 and a conductive base 4, which are fixedly connected to and coaxially arranged at the upper and lower positions via a fixed base 1. Specifically, as shown in the figure... Figure 1 and Figure 2 As shown, both the clamp 2 and the conductive base 4 are fixedly connected to the fixed base 1. The clamp 2 is located directly below the conductive base 4. In this embodiment, the conductive base 4 is a cylindrical structure, and the clamp 2 and the conductive base 4 are coaxially arranged. The purpose of this arrangement is to ensure that the electrode rod 3 clamped by the clamp 2 can be directly aligned with the conductive base 4 on the same vertical line, thus avoiding misalignment between the electrode rod 3 and the conductive base 4.

[0053] In this embodiment, the fixed base 1 includes a fixedly connected outer shell 11 and an insulating base 12, and the conductive base 4 is mounted on the insulating base 12.

[0054] like Figure 2 and Figure 3 As shown, the fixed base 1 is internally equipped with a scraper 5 that can move horizontally to the bottom of the conductive base 4 and a drive plate 6 that can move vertically up and down to the side of the conductive base 4. The drive plate 6 is vertically slidably installed inside the housing 11. Specifically, during the horizontal movement of the bottom of the conductive base 4, the scraper 5 can scrape off dust and other impurities adsorbed on the bottom surface of the conductive base 4, or remove residues generated by "sparking" on the bottom surface of the conductive base 4, thereby ensuring the smoothness and flatness of the bottom surface of the conductive base 4, so as to ensure that the electrode rod 3 can be electrically connected to the conductive base 4 and prevent poor contact.

[0055] like Figure 2 and Figure 3 As shown, the surface of the drive plate 6 is parallel to the lateral movement direction of the scraper plate 5. This ensures that the presence of the drive plate 6 does not obstruct the lateral movement of the scraper plate 5, allowing the scraper plate 5 to move smoothly horizontally.

[0056] When the electrode rod 3 is inserted from the bottom of the chuck 2 and gradually approaches the conductive base 4, the drive plate 6 converts the upward movement of the electrode rod 3 into the horizontal movement of the scraping plate 5 to scrape the bottom surface of the conductive base 4.

[0057] In the above technical solution, the horizontally movable scraper 5 can remove dust and other impurities adsorbed on the bottom surface of the conductive base 4, or remove residues caused by "arcing" on the bottom surface of the conductive base 4, thereby ensuring the smoothness and flatness of the bottom surface of the conductive base 4, so as to ensure that the electrode rod 3 can be electrically connected to the conductive base 4 and prevent poor contact. Furthermore, the drive plate 6 can directly convert the vertical insertion movement of the electrode rod 3 into the horizontal movement of the scraper 5 during the installation of the electrode rod 3, without the need for manual adjustment by the operator. The scraping plate 5 is positioned such that it scrapes the bottom surface of the conductive seat 4 every time the electrode rod 3 is installed, ensuring that there are no missed scrapes and guaranteeing that the electrode rod 3 can be stably electrically connected to the conductive seat 4 each time. At the same time, the drive plate 6 can also judge the smoothness of the bottom surface of the conductive seat 4. When the electrode rod 3 does not make smooth contact with the conductive seat 4, that is, when the electrode rod 3 is not inserted deep enough from the bottom of the chuck 2, it indicates that the scraping plate 5 has not successfully scraped off the residue on the bottom surface of the conductive seat 4, thus improving the overall safety of the EDM machine.

[0058] like Figure 3 , Figure 4 and Figure 9 As shown, the drive plate 6 includes a vertical plate 61 and a sloping rail 62 fixedly connected to the side of the vertical plate 61 near the scraper plate 5. The scraper plate 5 is slidably connected to the sloping rail 62 via a slider 63. The vertical plate 61 is vertically slidably connected inside the housing 11, which can be achieved using a linear sliding pair.

[0059] In this embodiment, two drive plates 6 are provided and symmetrically arranged on both sides of the conductive base 4, forming a channel between the two drive plates 6 for the scraper plate 5 to move horizontally. Inclined rails 62 are provided on the two adjacent sides of the two vertical plates 61. Providing two drive plates 6 also serves another purpose: the gravity of the drive plates 6 themselves can be used to accelerate the reset of the scraper plate 5. For example, after the electrode rod 3 is removed, the scraper plate 5 can quickly return to its initial position.

[0060] like Figure 3 and Figure 9 As shown, a connecting rod 64 extending directly below the conductive base 4 is fixed to the bottom of the vertical plate 61. A receiving groove 41 for accommodating the connecting rod 64 is provided on the lower surface of the conductive base 4. The electrode rod 3 pushes the vertical plate 61 upward through the connecting rod 64. When the electrode rod 3 contacts the bottom end face of the conductive base 4, the connecting rod 64 is neatly housed inside the receiving groove 41, without affecting the contact between the electrode rod 3 and the conductive base 4.

[0061] The working principle of the above technical solution is as follows:

[0062] When the electrode rod 3 moves upward and contacts the connecting rod 64, since the connecting rod 64 is fixedly connected to the vertical plate 61, and the vertical plate 61 is vertically slidably connected inside the outer shell 11, as the electrode rod 3 continues to move upward, the electrode rod 3 can push the vertical plate 61 to slide upward through the connecting rod 64. Since the scraper plate 5 is slidably connected to the inclined rail 62 through the slider 63, as the vertical plate 61 moves upward, the slider 63 will slide on the inclined rail 62, causing the scraper plate 5 to start to move horizontally, thus completing the purpose of converting the upward movement of the vertical plate 61 into the horizontal movement of the scraper plate 5.

[0063] like Figure 5 and Figure 6 As shown, the scraper 5 includes a horizontally arranged plate 51 and two second spring plates 54. The two second spring plates 54 are respectively fixed to the two ends of the plate 51 in the lateral direction. The upper surface of the second spring plate 54 is an inclined surface that is in contact with the upper surface of the plate 51. During the lateral movement of the plate 51, the inclined surface has a certain guiding effect, so that the upper surface of the plate 51 can smoothly slide over the bottom surface of the conductive base 4.

[0064] like Figure 5 and Figure 6 As shown, a scraping opening 511 is provided on the upper surface of the plate 51. The length of the scraping opening 511 in the direction perpendicular to the transverse movement direction of the plate 51 is greater than the diameter of the bottom surface of the conductive base 4. This allows the scraping opening 511 to scrape across the entire bottom surface of the conductive base 4, preventing the existence of scraping dead corners and ensuring that there are no foreign objects on the bottom surface of the conductive base 4. Moreover, the scraping opening 511 can achieve multiple scraping of the bottom surface of the conductive base 4. The specific reason is as follows: each scraping opening 511 has two scraping lines in the transverse movement direction of the plate 51. These scraping lines are formed at the junction of the upper surface of the plate 51 and the inner surface of the scraping opening 511, that is... Figure 6 The long lines formed between the scraping opening 511 and the upper surface of the plate 51 are provided in this embodiment. There are three scraping openings 511, thus forming six scraping lines. As the plate 51 slides over the bottom surface of the conductive seat 4, the six scraping lines can scrape the bottom surface of the conductive seat 4 in sequence, thereby realizing multiple scraping of the bottom surface of the conductive seat 4 and ensuring that stubborn residues can be completely scraped off.

[0065] In the above scheme, the scraping opening 511 can be set to scrape the bottom surface of the conductive seat 4 multiple times during the process of the plate 51 sliding over the bottom surface of the conductive seat 4, so as to ensure that stubborn residues can be completely scraped off. At the same time, the scraping opening 511 also has the function of improving the structural strength of the plate 51 and preventing the plate from bending and deforming during the scraping process.

[0066] like Figure 7As shown, in this embodiment, the scraper 5 is horizontally slidably connected to the fixed base 1 via the clutch mechanism 7.

[0067] like Figure 5 and Figure 6 As shown, a square frame 512 is integrally formed on the lower surface of the plate 51. A base plate 514 is detachably installed at the bottom end of the square frame 512, for example by screws. The square frame 512 and the base plate 514 form a recycling trough 513 with a sealed bottom and a top end connected to the scraping port 511.

[0068] In the above scheme, on the one hand, the presence of the frame 512 can improve the overall structural strength of the plate 51 and prevent the plate 51 from bending and deforming during the scraping of the bottom surface of the conductive seat 4. On the other hand, the setting of the recycling groove 513 can collect the impurities scraped off from the bottom surface of the conductive seat 4 and prevent the impurities from falling onto the top surface of the electrode rod 3 located directly below the conductive seat 4, ensuring the cleanliness of the top surface of the electrode rod 3 during installation, which is more conducive to the electrical connection between the electrode rod 3 and the conductive seat 4.

[0069] like Figure 7 and Figure 8 As shown, the clutch mechanism 7 includes a slide groove 71 formed on the side of the insulating base 12 and arranged along the lateral direction of the scraper plate 5, and a partition block 72 fixed inside the slide groove 71; the partition block 72 is located in the middle position inside the slide groove 71, making the slide groove 71 generally square-shaped. Specifically, as... Figure 8 As shown, the partition block 72 divides the slide 71 into an upper groove 73 and a lower groove 74. The two ends of the upper groove 73 are connected to the two ends of the lower groove 74 through vertical grooves. The upper groove 73, the lower groove 74, and the two vertical grooves work together to form a square shape. Spring inclined plates 75 are installed inside each of the two vertical grooves, and the arrangement of the two spring inclined plates 75 is as follows: Figure 8 As shown.

[0070] The scraper 5 also includes a connecting plate 52, which is slidably connected to the inside of the groove 71 via a round shaft 521. The connecting plate 52 is fixedly connected to the second spring plate 54 via a first spring plate 53.

[0071] The working principle of clutch mechanism 7 in actual use is as follows: Figure 8 As shown, the circular shaft 521 is located at the bottom right end of the slide groove 71. The plate 51 is in its initial position, and there is a certain gap in the vertical direction between the upper surface of the plate 51 and the bottom surface of the conductive seat 4 (this gap facilitates the resetting of the plate 51, which will be described below). Then, as the electrode rod 3 pushes the vertical plate 61 upward, it can drive the plate 51 to move horizontally, that is, the plate 51 begins to move to the left (towards...). Figure 8Using the left, right, up, and down directions as a reference, the circular shaft 521 moves to the left. Due to the action of the spring inclined plate 75 at the right end, the circular shaft 521 gradually slides upward along the spring inclined plate 75 during its leftward movement, causing the entire plate 51 to rise until the circular shaft 521 slides into the interior of the upper groove 73. At this point, the plate 51 has risen to its highest height, and there is a certain negative gap in the vertical direction between the upper surface of the plate 51 and the bottom surface of the conductive base 4, that is, the height of the upper surface of the plate 51 is higher than that of the conductive base. 4. Height of the bottom surface; then, as the plate 51 continues to move to the left, the circular shaft 521 will gradually move to the left along the upper groove 73; when the plate 51 is about to contact the conductive seat 4, the second spring plate 54 will play a guiding role. Specifically, since the height of the upper surface of the plate 51 is higher than the height of the bottom surface of the conductive seat 4 at this time, the second spring plate 54 will preferentially contact the conductive seat 4. Then, under the guidance of the second spring plate 54, the plate 51 is forced to move down a certain distance. At this time, the angle between the second spring plate 54 and the plate 51 increases, thereby making The plate 51 can be pressed against the bottom surface of the conductive base 4 under the elastic force generated by the second spring plate 54. As the plate 51 continues to move to the left, it can slide across the bottom surface of the conductive base 4 with a certain pressure. The scraping port 511 on the plate 51 will scrape the bottom surface of the conductive base 4 multiple times to remove impurities or residues. The scraped impurities or residues will enter the recycling tank 513. After the plate 51 slides across the bottom surface of the conductive base 4, it will continue to move to the left until the round shaft 521 passes through the leftmost spring plate. After the gap between 75 and the inner top wall of the slide 71 is closed, the vertical plate 61 reaches the leftmost end of the slide 71. At this time, the vertical plate 61 moves to the highest position, and the electrode rod 3 is in close contact with the conductive seat 4. When it is necessary to disassemble or replace the electrode rod 3, the clamp 2 is used to release the locking of the electrode rod 3, and then the electrode rod 3 is pulled out. At this time, the vertical plate 61 will slide downward under the action of the middle, thereby driving the plate body 51 to move to the right. Moreover, the circular shaft 521 will first move downward to the lowest end of the slide 71, and then move to the right along the lower groove 74 until the circular shaft 521 returns to the position as shown. Figure 8 The position shown; wherein, during the process of the circular shaft 521 moving to the right along the lower groove 74, the plate 51 returns to its initial height, that is, the plate 51 is at its lowest height, and there is a certain gap in the vertical direction between the upper surface of the plate 51 and the bottom end face of the conductive seat 4. Therefore, during the process of the plate 51 moving to the right, the upper surface of the plate 51 will not contact the bottom end face of the conductive seat 4, so the plate 51 can smoothly return to its initial position.

[0072] In the above scheme, the clutch mechanism 7 can raise the height of the plate 51 during the installation of the electrode rod 3, and then, with the action of the second spring plate 54, allow the plate 51 to slide under a certain pressure across the bottom surface of the conductive seat 4 to scrape away impurities from the bottom surface of the conductive seat 4. Alternatively, the height of the plate 51 can be lowered during the disassembly of the electrode rod 3, so that the plate 51 can be smoothly restored to its initial position so that it can scrape the bottom surface of the conductive seat 4 again when the electrode rod 3 is installed next time.

[0073] The present invention also provides a clamping method for an EDM electrode clamping device, which is based on the above-mentioned EDM electrode clamping device and specifically includes the following steps:

[0074] S1. Insert the electrode rod 3 from the bottom of the chuck 2 and move it upward, so that the top of the electrode rod 3 gradually approaches the bottom surface of the conductive base 4.

[0075] S2. During the upward movement of the electrode rod 3, the vertical plate 61 will be pushed to slide vertically upward through the connecting rod 64. With the cooperation of the inclined rail 62 and the slider 63, the scraping plate 5 can be driven to move horizontally, thereby scraping away the impurities on the bottom surface of the conductive seat 4.

[0076] S3. After the top of the electrode rod 3 contacts the bottom surface of the conductive base 4, the electrode rod 3 is clamped by the chuck 2.

[0077] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrode clamping device for an electrical discharge machine, characterized in that, It includes a clamp and a conductive seat that are fixedly connected by a fixed base and are coaxially arranged at the top and bottom. The fixed base is provided with a scraper that can move horizontally at the bottom of the conductive seat and a drive plate that can be vertically raised and lowered at the side of the conductive seat. The surface of the drive board is parallel to the lateral movement direction of the scraper. As the electrode rod is inserted from the bottom of the chuck and gradually approaches the conductive base, the drive plate converts the upward movement of the electrode rod into a horizontal movement of the scraping plate to scrape the bottom surface of the conductive base. The drive plate includes a vertical plate and an inclined rail fixedly connected to the side of the vertical plate near the scraper plate. The scraper plate is slidably connected to the inclined rail by a slider. The scraper includes a horizontally arranged plate body and two second spring plates, which are respectively fixed to two ends of the plate body in the lateral direction of movement. The scraper is horizontally slidably connected to the fixed base via a clutch mechanism; The clutch mechanism includes a slide groove formed on the side of the insulating seat and arranged along the lateral movement direction of the scraper, and a partition block fixed inside the slide groove. The dividing block divides the slide into an upper groove and a lower groove. The two ends of the upper groove are connected to the two ends of the lower groove through vertical grooves. Spring inclined plates are installed inside both vertical grooves.

2. The electrode clamping device for an EDM machine according to claim 1, characterized in that: The bottom of the vertical plate is fixed with a connecting rod extending directly below the conductive base, and the lower surface of the conductive base is provided with a receiving groove to accommodate the connecting rod. The electrode rod pushes the vertical plate upward through the connecting rod.

3. The electrode clamping device for an EDM machine according to claim 1, characterized in that: The upper surface of the plate is provided with a scraping opening, and the length of the scraping opening in the direction perpendicular to the transverse direction of the plate is greater than the diameter of the bottom surface of the conductive base.

4. The electrode clamping device for an EDM machine according to claim 3, characterized in that: A square frame is integrally formed on the lower surface of the plate. A base plate is detachably installed at the bottom of the square frame. The square frame and the base plate together form a recycling trough with a sealed bottom and a top that communicates with the scraping opening.

5. The electrode clamping device for an EDM machine according to claim 3, characterized in that: The mounting base includes a fixedly connected outer shell and an insulating base, and the conductive base is mounted on the insulating base.

6. The electrode clamping device for an EDM machine according to claim 5, characterized in that: The scraper also includes a connecting plate, which is slidably connected to the inside of the groove via a round shaft.

7. The electrode clamping device for an EDM machine according to claim 6, characterized in that: The connecting plate is fixedly connected to the second spring plate via a first spring plate.

8. A clamping method for an electrode clamping device for an EDM machine, characterized in that: This clamping method, based on the EDM electrode clamping device according to any one of claims 1-7, specifically includes the following steps: S1. Insert the electrode rod from the bottom of the chuck and move it upwards, so that the top of the electrode rod gradually approaches the bottom surface of the conductive base. S2. During the upward movement of the electrode rod, the vertical plate will be pushed to slide vertically upward through the connecting rod. With the cooperation of the inclined rail and the slider, the scraper plate can be driven to move horizontally to scrape away the impurities on the bottom surface of the conductive seat. S3. After the top of the electrode rod contacts the bottom surface of the conductive base, clamp the electrode rod with the chuck.

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