Spark discharge machine clamping positioning device

Abstract

The utility model discloses a spark discharge machine clamping positioning equipment relates to spark discharge machine technical field, including the immersion liquid tank, the upper of immersion liquid tank is equipped with the discharge machine head, the bottom of immersion liquid tank is equipped with fixed establishment, the fixed establishment includes fixed frame, the fixed frame in slidingly installed is attached to the pressure roof of its inner wall, the upper surface center position of pressure roof places has the tray, the four openings of square groove of fixed frame's inner side wall are set up to the four around of pressure roof, the side of square groove is close to fixed frame inner side wall and is installed with the inclined block, the sliding block of square groove is connected with the inclined block and is abutted, the fixed mounting of clamping plate has in the top of sliding block, the bottom surface of clamping plate is located the both sides of sliding block and is connected with pressure roof slidingly, the sliding block is inserted with the guide column, in the utility model, through pressure roof, sliding block, clamping plate and spring etc.

Description

Technical Field

[0001] This utility model relates to the field of spark discharge machine technology, specifically to a spark discharge machine clamping and positioning device. Background Technology

[0002] A spark discharge machine, also known as an EDM machine tool or spark machine, is a machining device based on the principle of electric spark discharge. It utilizes the instantaneous high temperature and pressure generated during an electric spark discharge to melt, vaporize, or even eject a localized area of ​​the material being processed, thereby achieving material removal and machining. This machining method is suitable for cutting, drilling, engraving, and other processes involving materials such as metals and plastics.

[0003] In many EDM applications, workpieces need to be processed in an immersion solution. This process usually involves manually placing the workpiece into the liquid and using a fixture to fix it on the machine tool's worktable. However, most current EDM clamping and positioning devices do not have an automatic centering function. This means that each time a workpiece is clamped, the operator needs to manually adjust the position of the workpiece to ensure that it is centered on the machine tool. This process is not only time-consuming and labor-intensive, but also prone to introducing errors. In addition, the workpiece is usually placed first and then positioned by a fixture, which involves many steps and is not conducive to improving efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a spark discharge machine clamping and positioning device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a spark discharge machine clamping and positioning device, including an immersion tank, a discharge machine head above the immersion tank, and a fixing mechanism at the bottom of the immersion tank. The fixing mechanism includes a fixing frame, and a pressure-bearing top plate that slides within the fixing frame and conforms to its inner wall. A tray is placed at the center of the upper surface of the pressure-bearing top plate. Four square grooves with openings facing the inner wall of the fixing frame are formed around the pressure-bearing top plate around the tray. A ramp block is installed on the side of the square groove closest to the inner wall of the fixing frame. A slider that slidably connects to the ramp block is located inside the groove. A clamping plate is fixedly installed on the top of the slider. The bottom surface of the clamping plate is located on both sides of the slider and is slidably connected to the pressure-bearing top plate. A guide post is inserted through the slider. One end of the guide post is fixedly connected to the inner wall of the fixed frame, and the other end extends through the slider toward the center of the pressure-bearing top plate. A corrugated pipe is fixedly connected between the slider and the inner wall of the fixed frame. A spring is sleeved on the guide post. The two ends of the spring are fixedly connected to the end of the slider near the corrugated pipe and the inner wall of the fixed frame, respectively.

[0006] Furthermore, the ramp block has a first inclined surface that slopes downward toward the inner wall of the fixed frame on the side near the center of the pressure plate, with an inclination angle of 45 degrees. The top of the slider has a second inclined surface that matches the first inclined surface, with an inclination angle of 45 degrees.

[0007] Furthermore, an installation block is installed on the side wall of the immersion tank, a hydraulic rod is installed above the installation block, a fixing plate is installed on the movable end of the hydraulic rod, an installation plate is installed on the fixing plate, lifting ropes are connected to the four corners of the bottom surface of the installation plate, a vertical rod is connected to the center of the bottom surface of the installation plate, the bottom end of the vertical rod is fixedly connected to the discharge head, and lifting rings are installed at the four corners of the outer side of the tray, with one end of the lifting rope fixedly connected to the lifting ring.

[0008] Furthermore, the cross-section of the two opposing clamping plates is rectangular, and the cross-section of the other two opposing clamping plates is U-shaped.

[0009] Furthermore, rubber pads are installed on opposite sides of the four clamping plates, and washers are installed at the junction of the slider and the guide post.

[0010] Furthermore, reinforcing columns are installed on both sides of the bottom of the mounting plate. The reinforcing columns are inclined downwards, with one end fixedly connected to the fixing plate and the other end fixedly connected to the end of the mounting plate away from the fixing plate.

[0011] Furthermore, the suspension rope is made of polyester fiber.

[0012] Furthermore, the bottom of the immersion tank is equipped with casters.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model achieves adaptive clamping of workpieces through components such as a pressure-bearing top plate, slider, clamping plate and spring. After the workpiece is placed on the tray, its gravity will cause the pressure-bearing top plate to drop. Then, through the guiding action of the ramp block, the slider slides along the guide post, which drives the clamping plate to gradually approach and clamp the workpiece, simplifying the workpiece clamping process and improving work efficiency.

[0015] 2. This utility model has rubber pads installed on the opposite sides of the four clamping plates, which increases the friction between the clamping plates and the workpiece, preventing the workpiece from sliding or shifting during processing, thereby protecting the workpiece from damage. At the same time, washers are installed at the junction of the slider and the guide post, which reduces the friction between the slider and the guide post and extends their service life. The bellows is made of PE material, which provides an extra protective layer for the spring and does not affect the slider's reset capability. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main body of a spark discharge machine clamping and positioning device;

[0017] Figure 2 A schematic diagram of the top structure of a spark discharge machine clamping and positioning device;

[0018] Figure 3 This is a schematic diagram of the structure above the fixed frame in a spark discharge machine clamping and positioning device.

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0020] Figure 5 A schematic diagram of the fixing mechanism of a spark discharge machine clamping and positioning device;

[0021] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0022] Figure 7 This is an exploded view of the fixing mechanism of a spark discharge machine clamping and positioning device.

[0023] In the picture:

[0024] 1. Immersion tank; 2. Mounting block; 3. Hydraulic rod; 4. Casters; 5. Fixing plate; 6. Mounting plate; 7. Reinforcing column; 8. Vertical rod; 9. Discharge generator head; 10. Fixing frame; 11. Clamping plate; 12. Tray; 13. Lifting ring; 14. Lifting rope; 15. Corrugated pipe; 16. Spring; 17. Guide column; 18. Sliding block; 19. Ramp block; 20. Square channel; 21. Rubber pad; 22. Pressure-bearing top plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7 This utility model provides a technical solution:

[0027] See Figure 5 , Figure 6 as well as Figure 7As shown, a spark discharge machine clamping and positioning device includes an immersion tank 1, a discharge head 9 is provided above the immersion tank 1, and a fixing mechanism is provided at the bottom of the immersion tank 1. The fixing mechanism includes a fixing frame 10, and a pressure-bearing top plate 22 that is slidably installed in the fixing frame 10 and conforms to its inner wall. A tray 12 is placed at the center of the upper surface of the pressure-bearing top plate 22. Four square grooves 20 with openings facing the inner sidewall of the fixing frame 10 are opened around the pressure-bearing top plate 22 around the tray 12. A ramp block 19 is installed on the side of the square groove 20 near the inner sidewall of the fixing frame 10. A sliding connection is provided in the square groove 20 to the ramp block 19. The slider 18 is abutting, and a clamping plate 11 is fixedly installed on the top of the slider 18. The bottom surface of the clamping plate 11 is located on both sides of the slider 18 and is slidably connected to the pressure-bearing top plate 22. A guide post 17 is inserted through the slider 18. One end of the guide post 17 is fixedly connected to the inner wall of the fixed frame 10, and the other end extends through the slider 18 toward the center of the pressure-bearing top plate 22. A bellows 15 is fixedly connected between the slider 18 and the inner wall of the fixed frame 10. A spring 16 is sleeved on the guide post 17. The two ends of the spring 16 are fixedly connected to the end of the slider 18 near the bellows 15 and the inner wall of the fixed frame 10, respectively.

[0028] In the specific implementation process, the immersion tank 1 is used to hold coolant and provide a working environment for the discharge head 9. When the workpiece needs to be processed, after the workpiece is placed on the tray 12, the workpiece applies pressure to the pressure plate 22. Through the guiding action of the ramp block 19, the slider 18 will slide along the guide post 17. Using the gravity of the workpiece itself, the clamping plate 11 gradually approaches the workpiece and clamps the workpiece. After the processing is completed, the bellows 15 removes the workpiece from above the tray 12. At this time, the gravity of the workpiece on the pressure plate 22 disappears, the spring 16 returns to its original position, and the slider 18 will move to the outside of the workpiece and gradually release the workpiece as the gravity disappears. The bellows 15 is made of PE material, which provides an additional protective layer for the spring 16 and does not affect the reset capability of the slider 18.

[0029] It should be noted that when the slider 18 slides in the square groove 20, and the gravity applied by the workpiece is at the maximum moving distance of the slider 18, the maximum downward moving distance of the pressure plate 22 will not exceed the distance to the bellows 15.

[0030] See Figure 7As shown, the ramp block 19 has a first inclined surface on the side near the center of the pressure plate 22, which slopes downward toward the inner wall of the fixed frame 10 at an angle of 45 degrees. The top of the slider 18 has a second inclined surface that matches the first inclined surface, also with an angle of 45 degrees. In practice, the first inclined surface on the side of the ramp block 19 near the center of the pressure plate 22, which slopes downward toward the inner wall of the fixed frame 10 at an angle of 45 degrees, allows the slider 18 to slide smoothly along the first inclined surface of the ramp block 19 when the pressure plate 22 is subjected to the weight of the workpiece. This, in turn, causes the clamping plate 11 to clamp the slider. The top of the slider 18 has a second inclined surface that matches the first inclined surface, also with an angle of 45 degrees. This ensures that when the slider 18 is subjected to pressure from the pressure plate 22, the second inclined surface will contact the first inclined surface and slide relative to it.

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an installation block 2 is installed on the side wall of the immersion tank 1. A hydraulic rod 3 is installed above the installation block 2. A fixed plate 5 is installed on the movable end of the hydraulic rod 3. An installation plate 6 is installed on the fixed plate 5. Lifting ropes 14 are connected to the four corners of the bottom surface of the installation plate 6. A vertical rod 8 is connected to the center of the bottom surface of the installation plate 6. The bottom end of the vertical rod 8 is fixedly connected to the discharge head 9. Lifting rings 13 are installed at the four corners of the outer side of the tray 12. One end of the lifting rope 14 is fixedly connected to the lifting ring 13. In the specific implementation process, when the workpiece is processed, the hydraulic rod 3 is operated to extend and retract its movable end, thereby driving the fixed plate 5, the installation plate 6, and the connected vertical rod 8 and the discharge head 9 to move up and down. After processing is completed, the hydraulic rod 3 lifts the installation plate 6. Since the tray 12 is connected to the bottom of the installation plate 6 by the lifting ropes 14, the workpiece can be lifted and removed simultaneously.

[0032] See Figure 3 As shown, the cross-section of two opposing clamping plates 11 is rectangular, while the cross-section of the other two opposing clamping plates 11 is U-shaped. In practical implementation, the two rectangular clamping plates 11 provide stable clamping force, ensuring that the workpiece will not move or tilt during processing. The other two U-shaped clamping plates 11 are designed with their openings facing the workpiece, which can more effectively clamp the workpiece. The openings can accommodate the protruding parts of the workpiece while providing sufficient clamping area to ensure the stability of the workpiece during processing.

[0033] See Figure 1As shown, rubber pads 21 are installed on opposite sides of the four clamping plates 11. Washers are installed at the junction of the slider 18 and the guide post 17. Reinforcing posts 7 are installed on both sides of the bottom of the mounting plate 6. The reinforcing posts 7 are inclined downwards, with one end fixedly connected to the fixing plate 5 and the other end fixedly connected to the end of the mounting plate 6 away from the fixing plate 5. In the specific implementation, the installation of rubber pads 21 on opposite sides of the four clamping plates 11 can increase the friction between the clamping plates 11 and the workpiece, preventing the workpiece from sliding or shifting during processing. The washers at the junction of the slider 18 and the guide post 17 reduce the friction between the slider 18 and the guide post 17, allowing the slider 18 to slide more smoothly along the guide post 17. The washers also prevent direct contact between the slider 18 and the guide post 17, thereby extending their service life.

[0034] See Figure 1 and Figure 3 As shown, the lifting rope 14 is made of polyester fiber, and the bottom of the immersion tank 1 is equipped with casters 4. In the specific implementation process, the lifting rope 14 is made of polyester fiber, which has the characteristics of high strength, wear resistance, and corrosion resistance, making it very suitable for hoisting and suspending heavy objects. The design of the casters 4 allows the immersion tank 1 to move easily in different directions, making it convenient for the operator to move the immersion tank 1 to the required position.

[0035] Working principle:

[0036] Step 1: When the workpiece needs to be subjected to spark discharge machining, first place the workpiece on the tray 12. The weight of the workpiece will cause the pressure plate 22 to descend and contact the second inclined surface of the slider 18 through the inclined surface of the ramp block 19, resulting in relative sliding. As the pressure plate 22 descends, the slider 18 slides along the guide post 17, while the spring 16 is compressed. The sliding of the slider 18 drives the clamping plate 11 to move closer to the workpiece until the clamping plate 11 is tightly attached to the workpiece. The two rectangular clamping plates 11 provide a stable clamping force to prevent the workpiece from moving or tilting during the machining process, while the other two U-shaped clamping plates 11 can clamp the workpiece more effectively. Especially when the workpiece has an irregular shape or protruding parts, the rubber pad 21 increases the friction between the clamping plate 11 and the workpiece, further ensuring the stability of the workpiece during the machining process.

[0037] Step 2: After the workpiece is clamped and positioned, the hydraulic rod 3 starts to work. The extension and retraction of its movable end drives the fixed plate 5, the mounting plate 6, and the vertical rod 8 and the EDM head 9 connected to it to move up and down. The vertical rod 8 ensures that the EDM head 9 can be stably moved to the appropriate position above the workpiece for EDM. After the machining is completed, the hydraulic rod 3 works again to lift the mounting plate 6. Since the tray 12 is connected to the bottom of the mounting plate 6 by the lifting rope 14, the workpiece can be lifted and taken out at the same time.

[0038] Step 3: The casters 4 installed at the bottom of the immersion tank 1 allow the entire equipment to move easily in different directions, which makes it convenient for the operator to move the equipment to the required position to adapt to different processing needs. The lifting rope 14 is made of polyester fiber, which has the characteristics of high strength, wear resistance and corrosion resistance, ensuring the safety and reliability of lifting and suspending heavy objects.

Claims

1. A spark discharge machine clamping and positioning device, comprising an immersion tank (1), wherein a discharge head (9) is provided above the immersion tank (1), characterized in that, The bottom of the immersion tank (1) is provided with a fixing mechanism, which includes a fixing frame (10). A pressure-bearing top plate (22) that fits against the inner wall of the fixing frame (10) is slidably installed inside the fixing frame (10). A tray (12) is placed at the center of the upper surface of the pressure-bearing top plate (22). The pressure-bearing top plate (22) has four square grooves (20) with openings facing the inner wall of the fixing frame (10) around the tray (12). A ramp block (19) is installed on the side of the square groove (20) near the inner wall of the fixing frame (10). A slider (18) that abuts against the ramp block (19) is slidably connected inside the square groove (20). A fixed top of the slider (18) is provided with a A clamping plate (11) is provided, with its bottom surface located on both sides of the slider (18) and slidably connected to the pressure-bearing top plate (22). The slider (18) is provided with a guide post (17), one end of which is fixedly connected to the inner wall of the fixed frame (10), and the other end extends through the slider (18) toward the center of the pressure-bearing top plate (22). A corrugated pipe (15) is fixedly connected between the slider (18) and the inner wall of the fixed frame (10). A spring (16) is provided on the guide post (17), and both ends of the spring (16) are fixedly connected to the end of the slider (18) near the corrugated pipe (15) and the inner wall of the fixed frame (10), respectively.

2. The spark discharge machine clamping and positioning device as described in claim 1, characterized in that: The ramp block (19) has a first inclined surface that slopes downward toward the inner wall of the fixed frame (10) on one side near the center of the pressure plate (22), with an inclination angle of 45 degrees. The top of the slider (18) has a second inclined surface that matches the first inclined surface, with an inclination angle of 45 degrees.

3. The spark discharge machine clamping and positioning device as described in claim 2, characterized in that: The side wall of the immersion tank (1) is equipped with an installation block (2), and a hydraulic rod (3) is installed above the installation block (2). A fixing plate (5) is installed on the movable end of the hydraulic rod (3), and an installation plate (6) is installed on the fixing plate (5). A hanging rope (14) is connected to the four corners of the bottom surface of the installation plate (6). A vertical rod (8) is connected to the center of the bottom surface of the installation plate (6). The bottom end of the vertical rod (8) is fixedly connected to the discharge head (9). A lifting ring (13) is installed at the four corners of the outer side of the tray (12), and one end of the hanging rope (14) is fixedly connected to the lifting ring (13).

4. The spark discharge machine clamping and positioning device as described in claim 3, characterized in that: The cross-section of the two opposing clamping plates (11) is rectangular, and the cross-section of the other two opposing clamping plates (11) is U-shaped.

5. The spark discharge machine clamping and positioning device as described in claim 4, characterized in that: Rubber pads (21) are installed on the opposite sides of the four clamping plates (11), and washers are installed at the junction of the slider (18) and the guide post (17).

6. The spark discharge machine clamping and positioning device as described in claim 5, characterized in that: The mounting plate (6) has reinforcing columns (7) installed on both sides of its bottom. The reinforcing columns (7) are inclined downwards. One end of the reinforcing column (7) is fixedly connected to the fixing plate (5), and the other end is fixedly connected to the end of the mounting plate (6) away from the fixing plate (5).

7. The spark discharge machine clamping and positioning device as described in claim 6, characterized in that: The suspension rope (14) is made of polyester fiber.

8. The spark discharge machine clamping and positioning device as described in claim 7, characterized in that: The bottom of the immersion tank (1) is equipped with casters (4).

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