A quick tool setting electrical discharge machining tooling

Abstract

The utility model relates to the technical field of electric spark machining equipment, specifically, a kind of electric spark machining frock of quick tool setting, cooperate in electric spark machining machine use, including fixture and positioning device;Clamp is connected in the workbench of electric spark machining machine;Positioning device includes lifting rod and driving device;The bottom plate of clamp is provided with the through-hole for the lifting of lifting rod, so that lifting rod can be set in clamp;Driving device is connected to lifting rod, so that lifting rod extends out of bottom plate or retracts to the inside of bottom plate;The machining manipulator of electric spark machining machine is connected with machining electrode;Machining electrode is provided with positioning hole in cooperation with lifting rod, so that lifting rod can extend into positioning hole.In the installation of machining electrode, machining electrode is first installed in machining manipulator.Lifting rod is extended and enters the positioning hole of machining electrode to carry out the rough positioning of machining electrode, finally let electric spark machining machine execute center finding function, so that lifting rod is located in the center of positioning hole.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical discharge machining equipment, and more specifically, to an electrical discharge machining fixture for rapid tool setting. Background Technology

[0002] The electrical discharge machining (EDM) machine mainly consists of a machine tool body, a pulse power supply, a servo feed system, electrodes, and a CNC system. All components work together to complete the workpiece processing based on the high-temperature erosion principle generated by pulse spark discharge.

[0003] The machine tool body is equipped with a worktable and a machining robot: the worktable is responsible for connecting and firmly supporting the workpiece to be processed; the machining robot is mostly configured with three axes or more, and by connecting electrodes, it precisely controls the electrodes to approach the workpiece to be processed in order to carry out electrical discharge machining.

[0004] The pulse power supply provides high-frequency pulse energy to support the spark discharge erosion of materials; the servo feed system can precisely control the discharge gap between the electrode and the workpiece to ensure stable processing; the electrode, as a processing tool, directly determines the processing shape of the workpiece by discharging with the workpiece; the CNC system coordinates the movement and parameter settings of each component to achieve automated high-precision processing.

[0005] The electrode needs to undergo a tool setting operation to ensure its proper relative position with the machining robot, thereby guaranteeing accurate machining position of the electrode on the workpiece. However, in existing technologies, the position adjustment of the electrode and the machining robot relies on manual operation, requiring repeated measurements and adjustments, which is inefficient. This manual operation is not only time-consuming and labor-intensive, but also prone to measurement errors due to human factors, affecting the machining accuracy between the electrode and the workpiece, and failing to meet the urgent needs of modern manufacturing for efficient and high-precision machining. Utility Model Content

[0006] The purpose of this invention is to provide a fast-setting electrical discharge machining fixture that can quickly position the electrode and then quickly install it.

[0007] The embodiments of this utility model are achieved through the following technical solutions:

[0008] A rapid tool setting EDM fixture, used in conjunction with an EDM machine, includes a clamp and a positioning device. The clamp is connected to the worktable of the EDM machine. The positioning device includes a lifting rod and a drive device. The base plate of the clamp has a through hole for the lifting rod to move up and down, allowing the lifting rod to be mounted vertically within the clamp. The drive device is connected to the lifting rod, allowing the lifting rod to extend out of the base plate or retract into the base plate. The machining robot of the EDM machine is connected to a machining electrode. The machining electrode has a positioning hole that mates with the lifting rod, allowing the lifting rod to extend into the positioning hole.

[0009] Furthermore, it also includes a mounting plate; the base plate is connected to the mounting plate and the mounting plate is connected to the workbench; the mounting plate is also provided with a through hole for the lifting rod to move up and down.

[0010] Furthermore, the driving device is disposed on the mounting plate; the outer wall of the lifting rod is also provided with a protruding positioning ring; the positioning ring is frustum-shaped.

[0011] Furthermore, the driving device includes a drive motor and a drive ring; the drive ring is rotatably connected to the mounting plate; the drive ring is threadedly connected to the outside of the lifting rod; the drive motor is drivenly connected to the drive ring so that the drive ring drives the lifting rod to rise and fall.

[0012] Furthermore, the lifting rod is tubular; a positioning electrode is inserted inside the lifting rod; the positioning electrode extends to the outside of the lifting rod.

[0013] Furthermore, a locking mechanism is provided at the top of the lifting rod; the locking mechanism includes a locking nut and several clamping blocks; the several clamping blocks are arranged in a ring; the locking nut is threaded to the top of the lifting rod; the inner wall of the locking nut and the outer wall of the several clamping blocks are arranged in an inclined plane so that the several clamping blocks gradually move closer together when the locking nut is tightened.

[0014] Furthermore, the machining robot is also provided with a fixed plate; the machining electrode is connected to the fixed plate and the fixed plate is also provided with a positioning hole that communicates with the positioning hole of the base plate.

[0015] Furthermore, the positioning electrode is made of spring steel.

[0016] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0017] During electrode installation, the electrode is first mounted on the machining robot. The robot moves, and the drive mechanism extends the lifting rod, which then enters the positioning hole of the machining electrode for coarse positioning. Finally, the EDM machine performs a center-finding function, centered the lifting rod in the positioning hole, completing rapid electrode alignment. This structure eliminates the need for repeated manual measurement and adjustment, significantly improving tool setting efficiency while reducing measurement errors caused by human factors. It ensures machining accuracy between the electrode and the workpiece, meeting the demands of modern manufacturing for efficient and high-precision machining.

[0018] By mounting the lifting rod on the mounting plate, various sizes and types of fixtures can be connected to the mounting plate and positioned by the lifting rod. This greatly enhances the versatility and adaptability of the tooling, reduces the limitation on fixture models, and makes it convenient for users to change fixtures according to different processing needs, thus improving the flexibility of equipment use.

[0019] When the base plate is installed on the mounting plate, the frustum-shaped positioning ring enters the through hole of the base plate and can adjust the position of the base plate under the guidance of the frustum-shaped positioning ring, so that the lifting rod and the through hole of the base plate are concentric. In this way, not only can the electrode be accurately positioned by the lifting rod, but the fixture can also be quickly aligned, simplifying the fixture installation process and further improving the overall processing preparation efficiency and positioning accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the electrical discharge machining fixture for rapid tool setting according to this utility model.

[0021] Figure 2 A cross-sectional view of an electrical discharge machining fixture for rapid tool setting.

[0022] Figure 3 for Figure 2 Enlarged view of point a in the middle.

[0023] Figure 4 for Figure 2 Enlarged view of point b in the middle.

[0024] Reference numerals: 1-Base plate, 2-Clamping part, 3-Worktable, 4-Lifting rod, 5-Machining robot, 6-Machining electrode, 7-Positioning hole, 8-Mounting plate, 9-Positioning ring, 10-Drive motor, 11-Drive ring, 12-Positioning electrode, 13-Locking nut, 14-Clamping block, 15-Fixing plate, 16-Workpiece. Detailed Implementation

[0025] like Figures 1-4As shown, this embodiment provides a fast-setting electrical discharge machining (EDM) fixture for use with an EDM machine. The EDM machine involved in this embodiment mainly consists of a machine tool body, a pulse power supply, a servo feed system, electrodes, and a CNC system. These components work together, relying on the high-temperature erosion principle generated by pulsed spark discharge to process the workpiece 16. The machine tool body is equipped with a worktable 3 and a machining robot 5. The worktable 3 connects to and stably supports the workpiece 16 to be processed. The machining robot 5 is typically configured with three or more axes, and by connecting to the electrodes, it precisely controls the electrodes to approach the workpiece 16 to perform the discharge machining. The pulse power supply provides high-frequency pulse energy to support the spark discharge erosion of the material. The servo feed system can precisely adjust the discharge gap between the electrodes and the workpiece 16, ensuring stable processing. The electrode, as a machining tool, directly determines the machining shape of the workpiece 16, and machining is achieved through discharge with the workpiece 16. The CNC system coordinates the movement and parameter settings of each component, achieving automated high-precision machining, and this CNC system also has an automatic centering function.

[0026] The automatic centering function specifically involves the CNC system of the EDM machine controlling the machining robot 5 to move the machining electrode 6 along a specific trajectory, such as circular trajectory scanning. During this movement, by detecting the positional relationship between the machining electrode 6 and a reference object, such as changes in discharge or contact signals, the system automatically calculates and determines the center position of the reference object. The coordinates of the machining electrode 6 are then aligned with this center position, achieving rapid and precise positioning. Specifically, when the machining electrode 6 moves within the circular hole of the workpiece 16, it touches the hole wall, generating current and triggering and recording the current position of the machining electrode 6. Based on geometric principles, the center position of the circular hole can be calculated from the positions of any three points on the hole wall.

[0027] The fast tool setting EDM fixture provided in this embodiment includes a clamp and a positioning device. The clamp is connected to the worktable 3 of the EDM machine. The structure of the clamp needs to be set according to the characteristics of the workpiece 16 it holds. The clamp provided in the attached drawings of this embodiment is only one form. The clamp includes a base plate 1 and a clamping part 2 disposed above the base plate 1. The base plate 1 is used to connect to the worktable 3, and the clamping part 2 is used to clamp the workpiece 16. The positioning device includes a lifting rod 4 and a driving device. The base plate 1 of the clamp is provided with a through hole for the lifting rod 4 to rise and fall, so that the lifting rod 4 can be raised and lowered in the clamp. The driving device is connected to the lifting rod 4 and can drive the lifting rod 4 to extend out of the base plate 1 or retract into the base plate 1. The machining robot 5 of the EDM machine is connected to a machining electrode 6. The machining electrode 6 is provided with a positioning hole 7 in cooperation with the lifting rod 4, so that the lifting rod 4 can extend into the positioning hole 7.

[0028] During the installation of machining electrode 6, it is first installed on machining robot 5. Machining robot 5 moves, and then the driving device extends the lifting rod 4 and enters the positioning hole 7 of machining electrode 6 for coarse positioning. Finally, the EDM machine performs a center-finding function, centered the lifting rod 4 in the positioning hole 7, completing rapid electrode alignment. Subsequently, the driving device retracts the lifting rod 4 into the base plate 1 to prevent it from interfering with the clamping of workpiece 16. The fixture is used to clamp workpiece 16, and after machining a certain number of workpieces 16, positioning calibration can be performed using the lifting rod 4 to promptly eliminate errors. This structure eliminates the need for repeated manual measurement and adjustment, greatly improving tool setting efficiency while reducing measurement errors caused by human factors, ensuring machining accuracy between the electrode and workpiece 16, and meeting the demands of modern manufacturing for efficient and high-precision machining.

[0029] The fast-setting EDM fixture also includes a mounting plate 8. The base plate 1 of the fixture is connected to the mounting plate 8, the mounting plate 8 is connected to the worktable 3, and the mounting plate 8 is also provided with a through hole for the lifting rod 4 to rise and fall. The lifting rod 4 is actually set on the mounting plate 8.

[0030] By setting the lifting rod 4 on the mounting plate 8, various specifications and types of fixtures can be connected to the mounting plate 8 and positioned by the lifting rod 4, which greatly enhances the versatility and adaptability of the tooling, reduces the restriction on the fixture model, and makes it convenient for users to change fixtures according to different processing needs, thus improving the flexibility of equipment use.

[0031] like Figure 4 As shown, the drive device is mounted on the mounting plate 8, and a positioning ring 9 protrudes from the outer wall of the lifting rod 4. The positioning ring 9 is in the shape of a frustum.

[0032] When the base plate 1 is installed on the mounting plate 8, when the frustum-shaped positioning ring 9 enters the through hole of the base plate 1, the position of the base plate 1 can be adjusted under the guidance of the frustum-shaped positioning ring 9, thereby making the lifting rod 4 and the through hole of the base plate 1 concentric. In this way, not only can the electrode be accurately positioned through the lifting rod 4, but the installation of the fixture can also be quickly aligned, simplifying the fixture installation process and further improving the overall processing preparation efficiency and positioning accuracy.

[0033] The drive unit includes a drive motor 10 and a drive ring 11. The drive ring 11 is rotatably connected to the mounting plate 8 and threadedly connected to the outside of the lifting rod 4. The drive motor 10 is driven by the drive ring 11 and can drive the drive ring 11 to rotate, thereby causing the drive ring 11 to drive the lifting rod 4 to rise and fall. The outer wall of the drive ring 11 is provided with transmission teeth, and the drive motor 10 can be connected to the drive ring 11 through gears.

[0034] The combination of drive motor 10 and drive ring 11 is used as the drive device. The lifting rod 4 is raised and lowered through threaded transmission. This drive method is stable and precise in operation. It can accurately control the extension and retraction of the lifting rod 4, ensuring the accuracy of the fit between the lifting rod 4 and the positioning hole 7 of the machining electrode 6. At the same time, it realizes the automation of the lifting process, reduces manual operation, and improves work efficiency.

[0035] The lifting rod 4 is tubular, and a positioning electrode 12 is inserted inside it, with the positioning electrode 12 extending to the outside of the lifting rod 4.

[0036] The positioning electrode 12 directly participates in the positioning and engagement with the processing electrode 6. After long-term use, it is prone to wear. However, the positioning electrode 12 is designed to be pluggable and replaceable. When the positioning electrode 12 wears and affects the accuracy of center finding, only the positioning electrode 12 needs to be replaced, without replacing the entire lifting rod 4. This reduces maintenance costs and ensures the long-term accuracy of the center finding function.

[0037] like Figure 3 As shown, a locking mechanism is provided at the top of the lifting rod 4. The locking mechanism includes a locking nut 13 and several clamping blocks 14. The clamping blocks 14 are arranged in a ring. The locking nut 13 is threaded to the top of the lifting rod 4. The inner wall of the locking nut 13 is inclined to match the outer wall of the clamping blocks 14. When the locking nut 13 is tightened, the clamping blocks 14 will gradually move closer together.

[0038] By setting the locking mechanism, the positioning electrode 12 can be firmly clamped inside the lifting rod 4, preventing the positioning electrode 12 from loosening or shifting during the lifting process, thus ensuring the positioning accuracy. At the same time, the positioning electrode 12 can be easily replaced by loosening the locking nut 13. The operation is simple and quick, which improves the efficiency of replacing the positioning electrode 12 and enhances the flexibility of the tooling.

[0039] The machining robot 5 is also equipped with a fixed plate 15, to which the machining electrode 6 is connected. The fixed plate 15 also has positioning holes 7 that connect to the positioning holes 7 of the base plate 1. The machining electrode 6 is generally made of copper plate. Specifically, the excess part of the copper plate is removed, leaving the part used for discharge. After the electrode is consumed, the remaining part of the copper plate is removed to form a new discharge part, until the copper plate is completely consumed. When the copper plate is very thin, its positioning holes 7 are almost non-existent. In this case, positioning can be achieved using the positioning holes 7 of the fixed plate 15.

[0040] The positioning electrode 12 is made of spring steel. Spring steel has good elasticity and toughness. When a slight alignment collision occurs between the lifting rod 4 and the positioning hole 7, the positioning electrode 12 can buffer the impact through its own elastic deformation, avoiding damage to the electrode or lifting rod 4 caused by hard collision, extending the service life of the tooling and reducing the maintenance cost of the equipment.

Claims

1. A quick tool setting electrical discharge machining tooling fitting for use with an electrical discharge machining machine, characterized by: The device includes a fixture and a positioning device; the fixture is connected to the worktable of the electrical discharge machining (EDM) machine; the positioning device includes a lifting rod and a driving device; the base plate of the fixture is provided with a through hole for the lifting rod to move up and down, so that the lifting rod is mounted on the fixture in a way that allows it to move up and down; the driving device is connected to the lifting rod, so that the lifting rod can extend out of the base plate or retract into the base plate; the machining robot of the EDM machine is connected to a machining electrode; the machining electrode is provided with a positioning hole in cooperation with the lifting rod, so that the lifting rod can extend into the positioning hole.

2. The quick tool alignment electro-discharge machining tooling apparatus of claim 1, wherein: It also includes a mounting plate; the base plate is connected to the mounting plate and the mounting plate is connected to the workbench; the mounting plate is also provided with a through hole for the lifting rod to move up and down.

3. The quick tool alignment electro-discharge machining tooling of claim 2, wherein: The drive device is mounted on the mounting plate; the outer wall of the lifting rod is also provided with a protruding positioning ring; the positioning ring is frustum-shaped.

4. The quick tool alignment electro-discharge machining tooling of claim 3, wherein: The driving device includes a drive motor and a drive ring; the drive ring is rotatably connected to the mounting plate; the drive ring is threaded to the outside of the lifting rod; the drive motor is driven to the drive ring so that the drive ring drives the lifting rod to rise and fall.

5. The quick tool alignment electro-discharge machining tooling of claim 4, wherein: The lifting rod is tubular; a positioning electrode is inserted inside the lifting rod; the positioning electrode extends to the outside of the lifting rod.

6. The quick tool alignment electro-discharge machining tooling of claim 5, wherein: The top end of the lifting rod is also provided with a locking mechanism; the locking mechanism includes a locking nut and several clamping blocks; the several clamping blocks are arranged in a ring; the locking nut is threaded to the top end of the lifting rod; the inner wall of the locking nut is set in an inclined plane to match the outer wall of the several clamping blocks, so that the several clamping blocks gradually move closer together when the locking nut is tightened.

7. The quick tool alignment electro-discharge machining tooling of claim 6, wherein: The machining robot is also provided with a fixed plate; the machining electrode is connected to the fixed plate and the fixed plate is also provided with a positioning hole that communicates with the positioning hole of the base plate.

8. The quick tool alignment electro-discharge machining tooling of claim 7, wherein: The positioning electrode is made of spring steel.

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