Electrical Discharge Machining Machine

Abstract

This invention relates to the field of machine tool equipment technology, and more particularly to an electrical discharge machining (EDM) machine tool, comprising a base and a mounting frame. An electrode assembly is mounted on the mounting frame, and a support frame is located above the mounting frame. A support base is fixed to the top of the support frame. The support base has symmetrically distributed positioning posts on both sides, and each positioning post has a groove on its closest side. A clamping mechanism is located inside the groove. Symmetrically distributed guide cylinders pass through the support frame, and the guide cylinders are connected to a top support mechanism, which supports the positioning posts. This invention achieves fully automated positioning and clamping of cylindrical workpieces through the coordinated operation of the sliding mechanism, the top support mechanism, and the clamping mechanism. Manual centering and clamping are eliminated, and the workpiece is automatically centered and firmly clamped before moving to the electrode assembly's machining position, effectively preventing shaking and displacement during machining and improving the accuracy and stability of EDM.

Description

Technical Field

[0001] This invention relates to the field of machine tool equipment technology, specifically to electrical discharge machining (EDM) machines. Background Technology

[0002] Electrical discharge machining (EDM) machines are precision equipment that uses the high temperature generated by pulsed discharge to perform electro-erosion machining on conductive workpieces. They mainly consist of a machine body, pulse power supply, servo control system, working fluid circulation system, and CNC device. They can process high-strength and high-hardness materials such as quenched steel and cemented carbide, and are suitable for machining complex cavities, narrow slits, deep holes, and mold forming, which are difficult to achieve with traditional cutting methods. During machining, the electrode and the workpiece do not contact each other, there is no cutting force, and deformation is not easily generated. The machining accuracy is high and the surface quality is stable. They are widely used in mold manufacturing, precision parts production, and other fields. This equipment has strong applicability and can not only complete conventional cavity and engraving machining, but also perform various forms of machining on cylindrical workpieces such as grooves, holes, end faces, and outer contours.

[0003] When machining cylindrical workpieces, traditional EDM machines mostly require manual operation to position, align, and clamp the workpiece. This process is not only cumbersome and labor-intensive, but also prone to low positioning accuracy due to human error, affecting the machining quality. In addition, after the workpiece is machined, it still needs to be manually unclamped and removed, resulting in low automation and poor operational continuity. Summary of the Invention

[0004] The purpose of this invention is to provide an electrical discharge machining (EDM) machine tool to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An electrical discharge machining (EDM) machine includes a base and a mounting frame. An electrode assembly is mounted on the mounting frame. A support frame is located above the mounting frame, and a support base is fixed to the top of the support frame. Symmetrically distributed positioning posts are located on both sides of the support base. Each positioning post has a groove on its closest side, and a clamping mechanism is located inside the groove. The clamping mechanism is used to clamp a cylindrical workpiece. Symmetrically distributed guide cylinders pass through the support frame and are connected to a top support mechanism. The top support mechanism supports the positioning posts, enabling the positioning posts to position the cylindrical workpiece. A sliding mechanism is connected to the support frame, which drives the support frame to move horizontally, allowing the cylindrical workpiece to move below the electrode assembly. Simultaneously, the sliding mechanism drives the clamping mechanism and the top support mechanism to operate.

[0007] Preferably, the top support mechanism includes a first abutment rod fixedly connected to the side wall of the positioning column, the first abutment rod passing through the guide cylinder and slidably connected thereto, a first elastic element provided outside the first abutment rod, the two ends of the first elastic element being fixedly connected to the side wall of the positioning column and the side wall of the guide cylinder respectively, and symmetrically distributed limiting rods fixed on the side wall of the positioning column, the limiting rods extending into the inside of the guide cylinder and slidably connected to the inner wall of the guide cylinder, wherein a trapezoidal plate capable of pressing the first abutment rod is fixed on the base.

[0008] Preferably, the clamping mechanism includes multiple second abutments that penetrate the side wall of the positioning post and are circumferentially distributed. Each end of a second abutment is rotatably connected to a movable rod, and the other end of the movable rod is rotatably connected to a rotating ring. Multiple circumferentially distributed limiting blocks are fixed on the inner wall of the rotating ring. The outer wall of the positioning post is provided with circumferentially distributed limiting grooves that are adapted to the limiting blocks. The ends of the limiting blocks are located inside the limiting grooves and are slidably connected to them. The rotating ring is connected to a rotating assembly, which is used to drive the rotating ring to rotate.

[0009] Preferably, the rotating assembly includes a first set of teeth disposed on the outer wall of the rotating ring, the first set of teeth meshing with a first gear, the first gear being fixedly connected to a rotating cylinder, a support plate being fixed on the outer wall of the positioning column, the rotating cylinder passing through the support plate and being rotatably connected to it, wherein the rotating cylinder is connected to a rotating component, the rotating component being used to drive the rotating cylinder to rotate.

[0010] Preferably, the rotating component includes a fixed frame fixedly connected to a support plate, a first air cylinder passing through the inside of the fixed frame, an air rod passing through the end of the first air cylinder, the air rod extending into the rotating cylinder, wherein a pressing protrusion is fixed on the outer wall of the air rod, and an arc-shaped groove adapted to the pressing protrusion is provided on the inner wall of the rotating cylinder, the pressing protrusion is located inside the arc-shaped groove and slidably connected thereto, and an air inlet is connected to the first air cylinder for inflating the first air cylinder.

[0011] Preferably, the air intake component includes a cavity disposed inside the guide cylinder, an airbag is disposed inside the cavity, the airbag is connected to an exhaust pipe, the other end of the exhaust pipe is connected to a first air pressure cylinder, and a compression block capable of compressing the airbag is fixed outside the first push rod.

[0012] Preferably, the guide cylinder is connected to a swing assembly, which is used to drive the positioning column to swing back and forth, and the support frame is provided with an air blowing assembly, which is used to blow air onto the cylindrical workpiece.

[0013] Preferably, the swing assembly includes a second gear fixed on the outer wall of the guide cylinder, a limiting frame is provided on the outer side of the second gear, the limiting frame is connected to the base, and the top and bottom of the inner wall of the limiting frame are provided with staggered second tooth sets that can mesh with the second gear.

[0014] Preferably, the air blowing assembly includes a fixed plate fixedly connected to the support frame, a second air pressure cylinder passing through the fixed plate, a piston slidably connected inside the second air pressure cylinder, a support rod fixed at the bottom of the piston, a connecting rod rotatably connected at the lower end of the support rod, and the other end of the connecting rod rotatably connected to the outer wall of the guide cylinder. An air inlet pipe and an air outlet pipe are provided above the piston and on the outer wall of the second air pressure cylinder.

[0015] Preferably, the bottom of the support frame has a pin that passes through it, and the pin is connected to the bottom of the support frame through a second elastic element. The outer wall of the guide cylinder is provided with a pin groove that matches the pin, and the top of the base is fixed with a trapezoidal platform that can compress the pin.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention achieves fully automated positioning and clamping of cylindrical workpieces through the linkage of sliding mechanism, top support mechanism and clamping mechanism, eliminating the need for manual centering and clamping. The workpiece can be automatically centered and firmly clamped before moving to the electrode assembly processing position, effectively avoiding shaking and displacement during processing, improving the accuracy and stability of EDM. After processing, the clamping and top support can be automatically released when the support frame returns to the initial position, eliminating the need for manual unclamping and unloading. The workpiece is easy and efficient to pick up and put down, significantly improving the processing efficiency and ease of use of cylindrical workpieces.

[0017] This invention uses a swing assembly to drive the positioning column and cylindrical workpiece to reciprocate. In conjunction with the air blowing assembly on the support frame, it can clean the workpiece with air before and after processing. The workpiece swing allows the airflow to fully cover the surface, ends and cavity areas, greatly improving the effect of blowing away impurities and residual liquid. It ensures that the workpiece surface is clean before processing to improve processing accuracy, and can quickly clean the electrolytic corrosion debris and residual working fluid after processing. The overall cleaning is more uniform and without dead corners, with a high degree of automation and significantly improved cleaning effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the support frame and support base structure in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the connection structure between the guide cylinder and the extrusion column in an embodiment of the present invention. Figure 1 .

[0021] Figure 4 This is a schematic diagram of the connection structure between the guide cylinder and the extrusion column in an embodiment of the present invention. Figure 2 .

[0022] Figure 5 This is a schematic diagram of the limiting frame structure in an embodiment of the present invention.

[0023] Figure 6 This is a cross-sectional view of the internal structure of the guide cylinder in an embodiment of the present invention.

[0024] Figure 7 This is a cross-sectional view of the internal structure of the rotating cylinder and the first air pressure cylinder in an embodiment of the present invention.

[0025] In the diagram: 1-Mounting frame, 2-Base, 3-Electrode assembly, 4-Top support mechanism, 41-First abutment rod, 42-Limiting rod, 43-First elastic element, 44-Trapezoidal plate, 5-Clamping mechanism, 51-Moving rod, 52-Second abutment rod, 53-Rotating ring, 54-Limiting block, 55-Limiting groove, 56-First tooth assembly, 57-First gear, 58-Rotating cylinder, 59-Pneumatic rod, 510-Support plate, 511-Fixed frame, 512-First pneumatic cylinder 513-Exhaust pipe, 514-Extrusion block, 515-Airbag, 516-Extrusion protrusion, 517-Arc groove, 6-Sliding mechanism, 7-Support seat, 8-Support frame, 9-Guide cylinder, 10-Extrusion column, 11-Second gear, 12-Second tooth set, 13-Limit frame, 14-Intake pipe, 15-Outtake pipe, 16-Fixing plate, 17-Piston, 18-Support rod, 19-Connecting rod, 20-Second elastic element, 21-Pin rod, 22-Trapezoidal platform. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0028] In one embodiment, see Figures 1-3 An electrical discharge machining (EDM) machine tool includes a base 2 and a mounting frame 1. An electrode assembly 3 is mounted on the mounting frame 1. A support frame 8 is provided above the mounting frame 1, and a support base 7 is fixed on the top of the support frame 8. Positioning columns are symmetrically distributed on both sides of the support base 7. A groove is provided on the side of the positioning columns that are close to each other. A clamping mechanism 5 is provided inside the groove. The clamping mechanism 5 is used to clamp a cylindrical workpiece. A symmetrically distributed guide cylinder 9 runs through the inside of the support frame 8. The guide cylinder 9 is connected to a top support mechanism 4. The top support mechanism 4 is used to support the positioning columns, so that the positioning columns can position the cylindrical workpiece. The support frame 8 is connected to a sliding mechanism 6. The sliding mechanism 6 is used to drive the support frame 8 to move horizontally, so that the cylindrical workpiece can move to below the electrode assembly 3. At the same time, the sliding mechanism 6 drives the support frame 8 to move horizontally and also drives the clamping mechanism 5 and the top support mechanism 4 to operate.

[0029] In this embodiment, when the EDM machine tool is in use, a cylindrical workpiece is placed on top of the support base 7, wherein the top of the support base 7 is provided with an arc-shaped groove adapted to the cylindrical workpiece. Then, the sliding mechanism 6 drives the support frame 8 to move horizontally, and the support frame 8 drives the cylindrical workpiece to move horizontally through the support base 7, so that the cylindrical workpiece can move to below the electrode assembly 3. Before the cylindrical workpiece moves to below the electrode assembly 3, the top support mechanism 4 and the clamping mechanism 5 operate synchronously. The top support mechanism 4 supports the positioning pins, so that the two positioning pins can move closer to each other, and the cylindrical workpiece is positioned by the positioning pins moving closer to each other. This allows the cylindrical workpiece to remain centered, ensuring the precision of machining the cylindrical workpiece. When the positioning column positions the cylindrical workpiece, the end of the cylindrical workpiece enters the groove on the side wall of the positioning column. At this time, the clamping mechanism 5 inside the groove clamps and fixes the cylindrical workpiece simultaneously, ensuring the stability of the cylindrical workpiece and avoiding shaking during machining. When the cylindrical workpiece moves to below the electrode assembly 3, it can be machined by the electrode assembly 3. The electrode assembly 3 is existing technology and consists of a pulse power supply, a servo control system, and a CNC device, which will not be described in detail here. The sliding mechanism 6 includes symmetrically distributed sliders fixedly connected to the bottom of the support frame 8. The base 2 has symmetrically distributed slide rails adapted to the sliders. The lower end of the slider is located inside the slide rail and slidably connected to it. The slider is driven by a drive component (such as a direct-drive motor or hydraulic rod), enabling the slider to move the support frame 8 horizontally. The slide rails, through the slider, limit the movement of the support frame 8, effectively improving its stability during movement. After the cylindrical workpiece is processed, the sliding mechanism 6 drives the support frame 8 to move in the opposite direction. When the support frame 8 reaches its initial position, the clamping mechanism 5 automatically releases its clamping state on the cylindrical workpiece, and the top support mechanism 4 automatically releases its top support state on the positioning column, allowing workers to quickly remove the cylindrical workpiece from the support base 7. This invention achieves fully automated positioning and clamping of cylindrical workpieces through the coordinated operation of the sliding mechanism 6, the top support mechanism 4, and the clamping mechanism 5. It eliminates the need for manual centering and clamping, and the workpiece is automatically centered and firmly clamped before moving to the processing position of the electrode assembly 3, effectively preventing shaking and displacement during processing and improving the accuracy and stability of EDM. After processing, the clamping and top support are automatically released when the support frame 8 returns to the initial position, eliminating the need for manual unclamping and unloading. This makes workpiece handling convenient and efficient, significantly improving the processing efficiency and ease of use for cylindrical workpieces.

[0030] Please see Figure 1 and Figure 4The top support mechanism 4 includes a first abutment 41 fixedly connected to the side wall of the positioning column. The first abutment 41 passes through the guide cylinder 9 and is slidably connected to it. A first elastic element 43 is provided on the outside of the first abutment 41. The two ends of the first elastic element 43 are fixedly connected to the side wall of the positioning column and the side wall of the guide cylinder 9, respectively. A symmetrically distributed limiting rod 42 is fixed on the side wall of the positioning column. The limiting rod 42 extends into the inside of the guide cylinder 9 and is slidably connected to the inner wall of the guide cylinder 9. A trapezoidal plate 44 that can compress the first abutment 41 is fixed on the base 2.

[0031] When using this EDM machine, a cylindrical workpiece is placed on top of the support base 7. Then, the sliding mechanism 6 drives the support frame 8 to move horizontally. The support frame 8 drives the cylindrical workpiece to move horizontally through the support base 7. When the sliding mechanism 6 drives the support frame 8 to move horizontally, the first abutment 41 moves synchronously with the support frame 8 and contacts the trapezoidal plate 44 fixed on the base 2. Under the action of the inclined surface of the trapezoidal plate 44, the first abutment 41 is squeezed and pushes the positioning column inward, so that the positioning columns on both sides are close to each other, realizing the centering and positioning of the cylindrical workpiece. When the support frame 8 moves in the opposite direction to the initial position, the first abutment 41 is released from the squeezing of the trapezoidal plate 44. Under the reset action of the first elastic element 43 (the first elastic element 43 can be a spring), the limit rod 42 drives the positioning column to reset outward, automatically releasing the top support positioning of the workpiece. That is, the top support mechanism 4 achieves automatic top support and centering of cylindrical workpieces and automatic release of top support through the mechanical cooperation of trapezoidal plate 44 and first abutment rod 41, automatic reset of first elastic element 43, and guide and limit of limit rod 42. No manual intervention is required for positioning and reset. The positioning accuracy is high and the operation is stable and reliable. The pure mechanical linkage structure is simple and compact, without the need for electrical control and pneumatic components. It has a low failure rate and long service life. It can be synchronously linked with sliding mechanism 6, which not only improves workpiece positioning efficiency and clamping consistency, but also further improves the overall automation level and operation convenience of machine tool.

[0032] Please see Figure 3 and Figure 4 The clamping mechanism 5 includes a plurality of second abutment rods 52 that penetrate the side wall of the positioning post and are distributed in a circumferential manner. Each end of the second abutment rod 52 is rotatably connected to a movable rod 51. The other end of the movable rod 51 is rotatably connected to a rotating ring 53. A plurality of circumferentially distributed limiting blocks 54 are fixed on the inner wall of the rotating ring 53. The outer wall of the positioning post is provided with circumferentially distributed limiting grooves 55 that are adapted to the limiting blocks 54. The ends of the limiting blocks 54 are located inside the limiting grooves 55 and are slidably connected to them. The rotating ring 53 is connected to a rotating assembly, which is used to drive the rotating ring 53 to rotate.

[0033] When using this EDM machine, a cylindrical workpiece is placed on top of the support base 7. Then, the sliding mechanism 6 drives the support frame 8 to move horizontally. The support frame 8, through the support base 7, drives the cylindrical workpiece to move horizontally. As the sliding mechanism 6 drives the support frame 8 to move horizontally, the rotating assembly drives the rotating ring 53 to rotate around the positioning post. During the rotation of the rotating ring 53, the rotating ring 53 drives the movable rod 51 to move synchronously. The movable rod 51 then pushes the second abutment 52 to extend radially along the positioning post. Multiple second abutments 52 simultaneously press towards the center, achieving circumferential clamping and fixing of the cylindrical workpiece within the groove. When the support frame 8 moves back to its initial position, the rotating ring 53 rotates in the opposite direction, which can drive the movable rod 51 and the second abutments 52 to retract, automatically releasing the clamping of the workpiece. The clamping mechanism 5 adopts a circumferentially distributed multi-bar synchronous telescopic structure. Through the transmission cooperation between the rotating ring 53 and the movable rod 51, it achieves uniform and stable clamping and releasing of cylindrical workpieces, with balanced force and less deformation. Automatic clamping and unclamping are achieved by using rotating components and mechanical transmission, eliminating the need for manual operation and achieving a high degree of automation. The limit block 54 and the limit groove 55 cooperate to ensure precise and reliable movement. The overall structure is compact and the transmission is smooth, which can not only improve clamping efficiency and positioning accuracy, but also effectively avoid workpiece shaking during processing and improve the quality of electrical discharge machining.

[0034] Please see Figure 4 The rotating assembly includes a first tooth set 56 disposed on the outer wall of the rotating ring 53, the first tooth set 56 meshing with a first gear 57, the first gear 57 being fixedly connected to a rotating cylinder 58, a support plate 510 being fixed on the outer wall of the positioning column, the rotating cylinder 58 passing through the support plate 510 and being rotatably connected to it, wherein the rotating cylinder 58 is connected to a rotating component, the rotating component being used to drive the rotating cylinder 58 to rotate.

[0035] When the sliding mechanism 6 drives the support frame 8 to move horizontally, the rotating component drives the rotating cylinder 58 to rotate, which in turn drives the first gear 57 to rotate. The first gear 57, through meshing with the first tooth set 56, drives the rotating ring 53 to rotate around the positioning post. During the rotation of the rotating ring 53, the rotating ring 53 drives the movable rod 51 to move synchronously. The movable rod 51 then pushes the second abutment 52 to extend radially along the positioning post. Multiple second abutments 52 simultaneously press against the center, realizing the circumferential clamping and fixing of the cylindrical workpiece in the groove. This rotating component adopts gear meshing transmission, which is compact in structure, precise in transmission, and stable in operation. It can reliably drive the rotating ring 53 to rotate, ensuring that the clamping mechanism 5 moves synchronously and consistently.

[0036] Please see Figure 4 , Figure 6 and Figure 7The rotating component includes a fixed frame 511 fixedly connected to the support plate 510. A first air cylinder 512 passes through the fixed frame 511. An air rod 59 passes through the end of the first air cylinder 512 and extends into the rotating cylinder 58. A pressing protrusion 516 is fixed on the outer wall of the air rod 59. An arc-shaped groove 517 adapted to the pressing protrusion 516 is provided on the inner wall of the rotating cylinder 58. The pressing protrusion 516 is located inside the arc-shaped groove 517 and is slidably connected to it. An air inlet is connected to the first air cylinder 512 and is used to inflate the first air cylinder 512.

[0037] When the EDM machine is in use, a cylindrical workpiece is placed on top of the support base 7. Then, the sliding mechanism 6 drives the support frame 8 to move horizontally. The support frame 8 drives the cylindrical workpiece to move horizontally through the support base 7. When the sliding mechanism 6 drives the support frame 8 to move horizontally, the air inlet fills the first air cylinder 512 with air. The air pressure inside the first air cylinder 512 increases and squeezes the air rod 59. The air rod 59 extends into the rotating cylinder 58. The extrusion protrusion 516 on the outer wall of the air rod 59 cooperates with the arc groove 517 on the inner wall of the rotating cylinder 58 and moves along the arc groove 517. The extrusion protrusion 516 squeezes the rotating cylinder 58 through the arc groove 517, thereby forcing the rotating cylinder 58 to rotate. This converts the linear motion of the air rod 59 into the rotational motion of the rotating cylinder 58. The rotating cylinder 58 drives the first gear 57 to rotate. The first gear 57 drives the rotating ring 53 to rotate around the positioning post through meshing with the first tooth set 56. This rotating component uses pneumatic drive in conjunction with the arc-shaped groove 517 to convert linear motion into rotational power. It features a simple structure, reliable operation, and eliminates the need for complex motors, facilitating integrated control with the machine tool. It boasts a high degree of automation and stable operation. To ensure the stability of the pneumatic rod 59 during movement, a support block is fixed to its outer wall. A guide rod is fixed to the side wall of the support block, passing through and slidably connecting to the fixed frame 511.

[0038] Please see Figure 6 The air intake component includes a cavity disposed inside the guide cylinder 9, an airbag 515 disposed inside the cavity, the airbag 515 being connected to an exhaust pipe 513, the other end of the exhaust pipe 513 being connected to a first air pressure cylinder 512, and a compression block 514 capable of compressing the airbag 515 being fixed outside the first push rod 41.

[0039] When using this EDM machine, a cylindrical workpiece is placed on top of the support base 7. Then, the sliding mechanism 6 drives the support frame 8 to move horizontally. The support frame 8, through the support base 7, drives the cylindrical workpiece to move horizontally. As the sliding mechanism 6 drives the support frame 8 to move horizontally, the first abutment 41 moves synchronously with the support frame 8 and contacts the trapezoidal plate 44 fixed on the base 2. Under the action of the inclined surface of the trapezoidal plate 44, the first abutment 41 is squeezed inward, pushing the positioning column. Simultaneously, the compression block 514 compresses the airbag 515, causing it to deform under pressure. The gas inside is transported through the exhaust pipe 513 to the first air cylinder 512, providing pneumatic power for the rotation of the rotating cylinder 58, thereby driving the clamping mechanism 5. When the support frame 8 resets and the first abutment 41 moves back, the compression block 514 releases the pressure on the airbag 515, and the airbag 515 returns to its original shape, ready for the next inflation. The air intake component achieves automatic air supply through the mechanical cooperation of the compression block 514 and the airbag 515, and is linked with the top support mechanism 4 throughout the process. It requires no manual control or additional power, has a simple structure, responds promptly, and greatly improves the automation and linkage of the overall device.

[0040] Please see Figure 3 and Figure 4 The guide cylinder 9 is connected to a swing assembly, which is used to drive the positioning column to swing back and forth. The support frame 8 is provided with an air blowing assembly, which is used to blow air onto the cylindrical workpiece.

[0041] The swing assembly can drive the positioning column and cylindrical workpiece to swing back and forth. In conjunction with the air blowing assembly on the support frame 8, it can blow air to clean the workpiece before and after processing. The workpiece swing can make the airflow fully cover the surface, end and cavity area, which greatly improves the effect of blowing away impurities and residual liquid. It can not only ensure the cleanliness of the workpiece surface before processing to improve the processing accuracy, but also quickly clean the electro-erosion debris and residual working fluid after processing. The overall cleaning is more uniform and without dead corners, with a high degree of automation and significantly improved cleaning effect.

[0042] Please see Figure 4 and Figure 5 The swing assembly includes a second gear 11 fixed on the outer wall of the guide cylinder 9. A limiting frame 13 is provided on the outer side of the second gear 11. The limiting frame 13 is connected to the base 2. The top and bottom of the inner wall of the limiting frame 13 are provided with a second tooth set 12 that is staggered and can mesh with the second gear 11.

[0043] When the sliding mechanism 6 drives the support frame 8 and the guide cylinder 9 to move horizontally, the second gear 11 moves synchronously with the guide cylinder 9 and meshes with the second tooth set 12 distributed alternately on the inner wall of the limit frame 13 in sequence. During the meshing process, the second gear 11 rotates alternately in the forward and reverse directions, thereby driving the guide cylinder 9, the positioning column and the cylindrical workpiece to reciprocate. No separate drive element is required. The swing action can be achieved by relying solely on horizontal movement. In addition, it can achieve all-round cleaning in conjunction with the air blowing component, effectively improving the cleaning effect and processing quality.

[0044] Please see Figure 3 The air blowing assembly includes a fixed plate 16 fixedly connected to the support frame 8. A second air pressure cylinder passes through the fixed plate 16. A piston 17 is slidably connected inside the second air pressure cylinder. A support rod 18 is fixed to the bottom of the piston 17. A connecting rod 19 is rotatably connected to the lower end of the support rod 18. The other end of the connecting rod 19 is rotatably connected to the outer wall of the guide cylinder 9. An air inlet pipe 14 and an air outlet pipe 15 are provided above the piston 17 and on the outer wall of the second air pressure cylinder.

[0045] When the sliding mechanism 6 moves the support frame 8 and the guide cylinder 9 swings, it drives the support rod 18 and piston 17 to reciprocate up and down inside the second pneumatic cylinder via the connecting rod 19. When the piston 17 moves upward, it compresses the air in the upper part of the second pneumatic cylinder, causing the gas to be discharged from the outlet pipe 15 to form a blowing airflow. When it moves downward, it replenishes the air through the inlet pipe 14, thus realizing reciprocating automatic blowing. No electrical or pneumatic control devices are required. The structure is simple and the action is synchronized. It can continuously supply air for cleaning before and after workpiece processing, and achieves thorough cleaning without dead angles with the swinging motion. In order to ensure the unidirectional flow of gas, one-way valves are provided on both the inlet pipe 14 and the outlet pipe 15.

[0046] Please see Figure 1 and Figure 3 The bottom of the support frame 8 is provided with a pin 21, which is connected to the bottom of the support frame 8 through a second elastic element 20. The outer wall of the guide cylinder 9 is provided with a pin groove that is adapted to the pin 21. The top of the base 2 is fixed with a trapezoidal platform 22 that can compress the pin 21.

[0047] After the guide cylinder 9 completes its swing, the pin groove and pin 21 are precisely aligned. When the cylindrical workpiece moves below the electrode assembly 3, the trapezoidal platform 22 on the base 2 presses against the pin 21, causing the end of the pin 21 to engage in the pin groove, thus locking and fixing the guide cylinder 9. After processing, the support frame 8 moves in the opposite direction, the trapezoidal platform 22 releases its pressure, and the pin 21 automatically resets under the action of the second elastic element 20, disengaging from the pin groove and no longer restricting the swing of the guide cylinder 9. This structure can automatically lock the guide cylinder 9 during workpiece processing, preventing the swing from affecting processing accuracy, and automatically unlocks after processing, without interfering with subsequent swing cleaning actions. The positioning and unlocking are fully linked and automatic, ensuring processing stability without affecting the swing blowing effect. The mechanism is simple and reliable.

[0048] Working Principle: This invention achieves fully automated operation of cylindrical workpieces from loading, positioning, clamping, processing, cleaning to unloading through the full mechanical linkage of the sliding mechanism 6, the top support mechanism 4, the clamping mechanism 5, the rotating component, the rotating part, the air inlet component, the swing component, the air blowing component, and the locking structure (pin 21, second elastic element 20, trapezoidal platform 22). It eliminates the need for manual centering, clamping, loosening, and unloading operations, significantly reducing labor intensity and human error, and substantially improving processing efficiency and ease of use. The top support mechanism 4 automatically centers and positions the workpiece using the trapezoidal plate 44, the first abutment 41, and the first elastic element 43. Combined with the circumferentially distributed clamping mechanism 5, it forms a uniform and reliable radial clamping, effectively preventing processing wobbling and ensuring the accuracy and stability of EDM. The air intake component utilizes the extrusion block 514 and air bladder 515 to achieve automatic air supply, providing pneumatic power to the rotating parts. This power is then used to drive the clamping action via gear meshing. The entire process requires no motor, electrical control, or external air source, resulting in a compact structure, low failure rate, and stable operation. The swing assembly meshes with the interlocking tooth set 12 via the second gear 11, causing the workpiece to automatically swing back and forth during movement. In conjunction with the air blowing assembly linked to the guide cylinder 9, it can perform all-round, thorough air blowing cleaning of the workpiece before and after processing, effectively removing surface impurities and residual liquid, further improving processing quality and cleaning effect.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrical discharge machining (EDM) machine tool, comprising a base (2) and a mounting bracket (1); characterized in that, The mounting frame (1) is equipped with an electrode assembly (3). A support frame (8) is provided above the mounting frame (1). A support base (7) is fixed on the top of the support frame (8). The support base (7) has symmetrically distributed positioning columns on both sides. Each positioning column has a groove on the side that is close to each other. A clamping mechanism (5) is provided inside the groove. The clamping mechanism (5) is used to clamp the cylindrical workpiece. A symmetrically distributed guide cylinder (9) runs through the inside of the support frame (8). The guide cylinder (9) is connected to a top support mechanism (4). The top support mechanism (4) is used to support the positioning column, so that the positioning column can position the cylindrical workpiece. The support frame (8) is connected to a sliding mechanism (6). The sliding mechanism (6) is used to drive the support frame (8) to move horizontally, so that the cylindrical workpiece can move to the bottom of the electrode assembly (3). The sliding mechanism (6) can also drive the clamping mechanism (5) and the top support mechanism (4) to operate while driving the support frame (8) to move horizontally.

2. The electrical discharge machining tool according to claim 1, characterized in that, The top support mechanism (4) includes a first abutment (41) fixedly connected to the side wall of the positioning column. The first abutment (41) passes through the guide cylinder (9) and is slidably connected to it. A first elastic element (43) is provided on the outside of the first abutment (41). The two ends of the first elastic element (43) are fixedly connected to the side wall of the positioning column and the side wall of the guide cylinder (9) respectively. A symmetrically distributed limiting rod (42) is fixed on the side wall of the positioning column. The limiting rod (42) extends into the inside of the guide cylinder (9) and is slidably connected to the inner wall of the guide cylinder (9). A trapezoidal plate (4) that can squeeze the first abutment (41) is fixed on the base (2).

3. The electrical discharge machining tool according to claim 2, characterized in that, The clamping mechanism (5) includes a plurality of second abutments (52) that penetrate the side wall of the positioning post and are distributed in a circular pattern. Each end of the second abutment (52) is rotatably connected to a movable rod (51). The other end of the movable rod (51) is rotatably connected to a rotating ring (53). A plurality of circumferentially distributed limiting blocks (54) are fixed on the inner wall of the rotating ring (53). The outer wall of the positioning post is provided with circumferentially distributed limiting grooves (55) that are adapted to the limiting blocks (54). The end of the limiting block (54) is located inside the limiting groove (55) and is slidably connected to it. The rotating ring (53) is connected to a rotating assembly, which is used to drive the rotating ring (53) to rotate.

4. The electrical discharge machining tool according to claim 3, characterized in that, The rotating assembly includes a first tooth set (56) disposed on the outer wall of the rotating ring (53), the first tooth set (56) meshing with a first gear (57), the first gear (57) being fixedly connected to a rotating cylinder (58), a support plate (510) being fixed on the outer wall of the positioning column, the rotating cylinder (58) passing through the support plate (510) and being rotatably connected to it, wherein the rotating cylinder (58) is connected to a rotating component, the rotating component being used to drive the rotating cylinder (58) to rotate.

5. The electrical discharge machining tool according to claim 4, characterized in that, The rotating component includes a fixed frame (511) fixedly connected to the support plate (510). A first air cylinder (512) passes through the inside of the fixed frame (511). An air rod (59) passes through the end of the first air cylinder (512). The air rod (59) extends into the rotating cylinder (58). A pressing protrusion (516) is fixed on the outer wall of the air rod (59). An arc groove (517) adapted to the pressing protrusion (516) is provided on the inner wall of the rotating cylinder (58). The pressing protrusion (516) is located inside the arc groove (517) and is slidably connected to it. An air inlet is connected to the first air cylinder (512). The air inlet is used to inflate the first air cylinder (512).

6. The electrical discharge machining tool according to claim 5, characterized in that, The air intake component includes a cavity disposed inside the guide cylinder (9), an airbag (515) is provided inside the cavity, the airbag (515) is connected to an exhaust pipe (513), the other end of the exhaust pipe (513) is connected to a first air pressure cylinder (512), and a compression block (514) capable of squeezing the airbag (515) is fixed outside the first push rod (41).

7. The electrical discharge machining tool according to claim 1, characterized in that, The guide cylinder (9) is connected to a swing assembly, which is used to drive the positioning column to swing back and forth. The support frame (8) is provided with an air blowing assembly, which is used to blow air onto the cylindrical workpiece.

8. The electrical discharge machining tool according to claim 7, characterized in that, The swing assembly includes a second gear (11) fixed on the outer wall of the guide cylinder (9). A limiting frame (13) is provided on the outer side of the second gear (11). The limiting frame (13) is connected to the base (2). The top and bottom of the inner wall of the limiting frame (13) are provided with a second tooth set (12) that is staggered and can mesh with the second gear (11).

9. The electrical discharge machining tool according to claim 7 or 8, characterized in that, The air blowing assembly includes a fixed plate (16) fixedly connected to the support frame (8). A second air pressure cylinder passes through the fixed plate (16). A piston (17) is slidably connected inside the second air pressure cylinder. A support rod (18) is fixed at the bottom of the piston (17). A connecting rod (19) is rotatably connected to the lower end of the support rod (18). The other end of the connecting rod (19) is rotatably connected to the outer wall of the guide cylinder (9). An air inlet pipe (14) and an air outlet pipe (15) are provided above the piston (17) and on the outer wall of the second air pressure cylinder.

10. The electrical discharge machining tool according to claim 9, characterized in that, The bottom of the support frame (8) is connected by a pin (21), which is connected to the bottom of the support frame (8) through a second elastic element (20). The outer wall of the guide cylinder (9) is provided with a pin groove that is compatible with the pin (21). The top of the base (2) is fixed with a trapezoidal platform (22) that can compress the pin (21).

Images