Electric spark deposition repairing and polishing integrated device

Abstract

The invention relates to an electric spark deposition repairing and polishing integrated device which comprises a repairing table and a support arranged above the repairing table, the surface of the support is in transmission connection with a moving frame, the surface of the moving frame is fixedly connected with an upper sealing plate, and an inner cavity of the upper sealing plate is provided with an electric spark machine head through a transmission mechanism. The two sides of the repairing table are slidably connected with sealing structures, wherein the sealing structures and the upper sealing plate form sealing pieces. The invention relates to the technical field of electric spark deposition repair. According to the electric spark deposition repairing and polishing integrated device, efficient and energy-saving inert gas management is achieved, a dynamic sealing cavity is matched with an intelligent air exhaust assembly, layered air exhaust is achieved through density difference, air is rapidly replaced, the positive pressure environment is maintained, the inert gas dissipation amount is reduced by 50% or above, meanwhile, the air injection amount of a machine head is reduced by 30%-40%, and cost is remarkably saved.

Description

Technical Field

[0001] The invention relates to the technical field of electrospark deposition repair, in particular to an electrospark deposition repair and polishing integrated device. Background Art

[0002] Electrospark deposition (ESD) is a surface repair and strengthening technology based on the principle of pulsed discharge. It uses instantaneous high temperatures to melt electrode materials and deposit them onto the workpiece surface. It is widely used in damage repair applications in aerospace, precision molds, automotive parts, and other fields. However, existing technologies face the following bottlenecks in practical application:

[0003] Difficulties in controlling inert gas atmosphere:

[0004] Electrospark deposition must be performed under the protection of an inert gas (such as argon) to prevent material oxidation. Traditional equipment uses an open chamber or a fixed sealed cover, requiring a continuous flow of large amounts of inert gas to maintain the environment (typically at a flow rate >15L / min). However, the gas escape rate can be as high as 40%-60%, leading to a surge in costs. Furthermore, the influx of air can easily cause defects such as pores and cracks in the deposited layer, affecting the quality of the repair.

[0005] Poor dynamic sealing adaptability:

[0006] Existing sealing structures are mostly rigid enclosures, which are unable to accommodate the multi-axis motion (such as lifting and rotating) of the EDM head during machining. This movement can easily create gaps in the sealed cavity, leading to gas leakage or infiltration of outside air. Some equipment has attempted to use flexible sealing materials, but these materials are prone to aging and cracking over time, resulting in high maintenance costs. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides an integrated device for electrospark deposition, repair and polishing, which solves the above-mentioned problems.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an integrated electrospark deposition repair and polishing device includes a repair platform and a bracket arranged above the repair platform, the surface of the bracket is transmission-connected to a movable frame, the surface of the movable frame is fixedly connected to an upper sealing plate, the inner cavity of the upper sealing plate is provided with an electrospark head via a transmission mechanism, and both sides of the repair platform are slidably connected to a sealing structure that forms a seal with the upper sealing plate;

[0009] The sealing structure includes a lower cover body driven by an electric push rod on the surface of the repair platform, an upper cover body connected to the top of the lower cover body via a nitrogen cylinder, and the upper and lower covers are connected by a metal corrugated layer. The sides of the upper and lower covers are both provided with exhaust components;

[0010] The top of the upper cover body is provided with a sliding groove which is slidably connected to the side of the upper sealing plate. When in use, the workpiece is first placed on the repair table for positioning, and then the sealing structures on both sides are driven by the driving mechanism to move toward the middle to form a complete sealing chamber with the upper sealing plate. The two upper covers are squeezed on both sides of the upper sealing plate, and cooperate with the metal corrugated layer below and the lower cover body to form a sealing chamber. At this time, the workpiece is repaired by the EDM head. During the repair, when the EDM head descends, the movable frame descends through the motor screw combination, and the metal corrugated layer is squeezed by the upper sealing plate to cooperate with the descent, and the balance is maintained by the nitrogen cylinder. When the movable frame is raised, it is automatically reset by the nitrogen cylinder, and can move freely up and down following the processing of the EDM head. Then, the first gear is driven by the motor to rotate, driving the annular gear ring to rotate, driving the rotating ring to make axial rotation in the upper sealing plate, driving the EDM head to rotate on the upper sealing plate, and driving the second gear to rotate The arc-shaped rack rotates, driving the rotating block to rotate in the rotating ring. The cooperation of the first gear assembly and the second gear assembly can conveniently adjust the angle of the EDM machine head to perform deposition repairs at different positions, and it can be ensured that it is within the internal range of the upper sealing plate during rotation. The elastic sealing ring covered by the surface of the rotating ring of the rotating block during rotation can ensure proper sealing effect. Vacuuming is performed on the inert gas ejected from different EDM machine heads. When the density of the inert gas is greater than that of the air, it sinks. At this time, starting the upper exhaust pipe can quickly extract the air, and then stop, so that the inside of the sealing structure is filled with inert gas to process the EDM machine head. Even if the inert gas escapes, it will only escape slowly, which can effectively reduce the use of inert gas and effectively prevent air from affecting processing. During processing, the amount of inert gas ejected from the EDM machine head can be reduced to ensure that the inside of the sealing mechanism is always in a positive pressure state, effectively preventing the inhalation of external air.

[0011] As a further solution of the present invention, the side of the upper sealing plate is covered with an elastic sealing ring, which plays a sealing role when the two upper covers are closed to seal the upper sealing plate.

[0012] As a further solution of the present invention: the exhaust component includes an upper exhaust pipe connected to the vacuum pump group, one end of the upper exhaust pipe is connected to the inner cavity of the upper cover body, the surface of the upper exhaust pipe is connected to the lower exhaust pipe through an electromagnetic valve, and the lower exhaust pipe is connected to the lower cover body. The upper exhaust pipe and the lower exhaust pipe are switched to vacuum the inert gas sprayed from different EDM heads. The inert gas sinks when the density is greater than that of air. At this time, starting the upper exhaust pipe can quickly extract the air, and then stop, so that the inside of the sealing structure is filled with inert gas to process the EDM head. Even if the inert gas escapes, it will only escape slowly, which can effectively reduce the use of inert gas and effectively prevent air from affecting processing. During processing, the amount of inert gas sprayed from the EDM head can be reduced to ensure that the inside of the sealing mechanism is always in a positive pressure state, effectively preventing the inhalation of external air.

[0013] As a further solution of the present invention: the transmission mechanism includes a rotating ring rotatably connected to the inner cavity of the upper sealing plate, the rotating ring is driven to rotate axially on the surface of the upper sealing plate by the first gear assembly, the inner cavity of the rotating ring is rotatably connected to a rotating block, the rotating block is driven to rotate radially in the rotating ring by the second gear assembly, and arc surfaces are provided on both sides of the rotating block that are adapted to the inner cavity of the rotating ring, the inner cavity of the rotating block is provided with a mounting groove for placing the EDM head, and the EDM head is fixed inside the mounting groove by interference fit.

[0014] As a further solution of the present invention: the first gear assembly includes an annular gear ring fixed above the rotating ring and a driving motor fixed on the side of the movable frame, the piston end of the driving motor is fixedly connected to a first gear that meshes with the annular gear ring, and the first gear is driven by the motor to rotate, thereby driving the annular gear ring to rotate, driving the rotating ring to rotate axially in the upper sealing plate, and driving the EDM machine head to rotate on the upper sealing plate.

[0015] As a further solution of the present invention: the second gear assembly includes an arc-shaped rack fixed on the top of the rotating block and a fixed ring fixed on the surface of the EDM machine head. The inner cavity of the fixed ring is rotatably connected to a second gear driven by a motor. The second gear is engaged with the arc-shaped rack. The rotation of the second gear drives the arc-shaped rack to rotate, and drives the rotating block to rotate in the rotating ring. Through the cooperation of the first gear assembly and the second gear assembly, the angle of the EDM machine head can be conveniently adjusted to perform deposition repairs at different positions, and it can be ensured to be within the internal range of the upper sealing plate when rotating. The elastic sealing ring covering the surface of the rotating ring of the rotating block can ensure proper sealing effect when rotating.

[0016] As a further solution of the present invention: the upper cover and the lower cover are both made of transparent materials, and the bottom of the lower cover is provided with a friction strip that is interference-fitted with the repair platform, which can ensure sealing during movement.

[0017] As a further solution of the present invention: the side edges of the metal corrugated layers are fixedly connected with sealing strips, and when the sealing structures on both sides are pressed against each other, the gaps between the metal corrugated layers are sealed by the sealing strips.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Efficient and energy-saving inert gas management: The dynamic sealing cavity is combined with an intelligent exhaust component to extract air in layers through density differences, quickly replacing air and maintaining a positive pressure environment. This reduces inert gas escape by more than 50% and reduces nozzle air volume by 30%-40%, significantly saving costs.

[0020] Omnidirectional flexible processing capability: The dual-gear transmission mechanism (axial annular gear + radial arc rack) drives the EDM head to achieve 360° circumferential adjustment and ±60° tilt swing, which can accurately cover complex areas such as deep cavities and curved surfaces, reduce workpiece repeated positioning by more than 90%, and improve repair efficiency.

[0021] Adaptive dynamic seal: The nitrogen cylinder and the metal corrugated layer work together to make the sealing chamber automatically expand and contract as the EDM head rises and falls. Combined with the elastic sealing ring and sliding groove design, it ensures airtightness throughout the movement and avoids the leakage risk of traditional rigid seals.

[0022] Restoration-polishing integration: Deposition and polishing functions are integrated in the same sealed chamber, and seamless process connection is achieved through rapid replacement of the head module, reducing equipment investment and floor space, and improving processing efficiency by 40%.

[0023] This device solves the pain points of traditional equipment such as gas waste, poor flexibility and separation of multiple processes. It is particularly suitable for efficient repair and surface enhancement in high-end fields such as aerospace engine blades and precision molds, and has significant economic efficiency and technological advancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the closed state of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the mobile rack of the present invention;

[0027] Figure 4 A top view of the sealing structure of the present invention

[0028] In the figure: 1. Repair table; 2. Bracket; 3. Moving frame; 4. Upper sealing plate; 5. Upper cover; 6. Lower cover; 7. Nitrogen cylinder; 8. Metal corrugated layer; 9. Lower exhaust pipe; 10. Upper exhaust pipe; 11. EDM machine head; 12. Second gear; 13. Arc rack; 14. Rotating block; 15. Arc surface; 16. Rotating ring; 17. Annular gear ring; 18. First gear; 19. Sliding groove; 20. Mounting groove; 21. Fixed ring. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0030] See also Figure 1-4 The present invention provides a technical solution: an integrated electrospark deposition repair and polishing device, comprising a repair platform 1 and a bracket 2 arranged above the repair platform 1, wherein the surface of the bracket 2 is transmission-connected to a movable frame 3, the surface of the movable frame 3 is fixedly connected to an upper sealing plate 4, the inner cavity of the upper sealing plate 4 is provided with an electrospark head 11 via a transmission mechanism, and sealing structures forming a sealing member with the upper sealing plate 4 are slidably connected on both sides of the repair platform 1;

[0031] The sealing structure includes a lower cover 6 driven by an electric push rod on the surface of the repair platform 1. The top of the lower cover 6 is provided with an upper cover 5 connected by a nitrogen cylinder 7. The upper cover 5 and the lower cover 6 are connected by a metal corrugated layer 8. The sides of the upper cover 5 and the lower cover 6 are both provided with exhaust components.

[0032] The top of the upper cover body 5 is provided with a sliding groove 19 which is slidably connected to the side of the upper sealing plate 4. When in use, the workpiece is first placed on the repair table 1 for positioning, and then the sealing structures on both sides are driven by the driving mechanism to move toward the middle to form a complete sealed chamber with the upper sealing plate 4. The two upper cover bodies 5 are squeezed on both sides of the upper sealing plate 4, and the metal corrugated layer 8 and the lower cover body 6 below form a sealed chamber. At this time, the workpiece is repaired by the EDM head 11. During the repair, when the EDM head 11 descends, the movable frame 3 descends through the motor screw combination, and the metal corrugated layer 8 is squeezed by the upper sealing plate 4 to cooperate with the descent, and is kept balanced by the nitrogen cylinder 7. When the movable frame 3 is raised, it is automatically reset by the nitrogen cylinder 7, and can move freely up and down following the processing of the EDM head 11. Then, the first gear 18 is driven by the motor to rotate, driving the annular gear ring 17 to rotate, driving the rotating ring 16 to make axial rotation in the upper sealing plate 4, driving the EDM head 11 to rotate on the upper sealing plate 4, and through the second gear 1 2 The rotation drives the arc-shaped rack 13 to rotate, and drives the rotating block 14 to rotate in the rotating ring 16. The cooperation of the first gear assembly and the second gear assembly can conveniently adjust the angle of the EDM head 11 to perform deposition repair at different positions, and when rotating, it can ensure that it is within the internal range of the upper sealing plate 4. When rotating, the elastic sealing ring covered by the rotating block 14 and the rotating ring 16 can ensure appropriate sealing effect. Vacuuming is performed according to the inert gas ejected by different EDM heads 11. When the density of the inert gas is greater than that of air, it sinks. At this time, starting the upper exhaust pipe 10 can quickly exhaust the air, and then stop, so that the interior of the sealing structure is filled with inert gas to process the EDM head 11. Even if the inert gas escapes, it will only escape slowly, which can effectively reduce the amount of inert gas used and effectively prevent air from affecting the processing. During processing, the amount of inert gas ejected from the EDM head 11 can be reduced, which can ensure that the interior of the sealing mechanism is always in a positive pressure state, effectively preventing the inhalation of external air.

[0033] The side of the upper sealing plate 4 is covered with an elastic sealing ring, which plays a sealing role when the two upper covers 5 are closed to seal the upper sealing plate 4.

[0034] The air extraction component includes an upper air extraction pipe 10 connected to the vacuum pump group, one end of the upper air extraction pipe 10 is connected to the inner cavity of the upper cover body 5, and the surface of the upper air extraction pipe 10 is connected to the lower air extraction pipe 9 through an electromagnetic valve, and the lower air extraction pipe 9 is connected to the lower cover body 6. The upper air extraction pipe 10 and the lower air extraction pipe 9 are switched to vacuum the inert gas ejected from different EDM heads 11. When the density of the inert gas is greater than that of the air, it sinks. At this time, starting the upper air extraction pipe 10 can quickly extract the air, and then stop, so that the inside of the sealing structure is filled with inert gas to process the EDM head 11. Even if the inert gas escapes, it will only escape slowly, which can effectively reduce the use of inert gas and effectively prevent air from affecting processing. During processing, the amount of inert gas ejected from the EDM head 11 can be reduced to ensure that the inside of the sealing mechanism is always in a positive pressure state, effectively preventing the inhalation of external air.

[0035] The transmission mechanism includes a rotating ring 16 rotatably connected to the inner cavity of the upper sealing plate 4. The rotating ring 16 is driven by the first gear assembly to rotate axially on the surface of the upper sealing plate 4. The inner cavity of the rotating ring 16 is rotatably connected to the rotating block 14. The rotating block 14 is driven by the second gear assembly to rotate radially in the rotating ring 16. Both sides of the rotating block 14 are provided with arc surfaces 15 adapted to the inner cavity of the rotating ring 16. The inner cavity of the rotating block 14 is provided with a mounting groove 20 for placing the EDM head 11, and the EDM head 11 is fixed inside the mounting groove by interference fit.

[0036] The first gear assembly includes an annular ring gear 17 fixed above the rotating ring 16 and a driving motor fixed to the side of the movable frame 3. The piston end of the driving motor is fixedly connected to a first gear 18 that meshes with the annular ring gear 17. The first gear 18 is driven by the motor to rotate, driving the annular ring gear 17 to rotate, driving the rotating ring 16 to rotate axially in the upper sealing plate 4, and driving the EDM head 11 to rotate on the upper sealing plate 4.

[0037] The second gear assembly includes an arcuate rack 13 fixed to the top of the rotating block 14 and a fixed ring 21 fixed to the surface of the EDM head 11. The inner cavity of the fixed ring 21 is rotatably connected to the second gear 12 driven by the motor. The second gear 12 is engaged with the arcuate rack 13. The rotation of the second gear 12 drives the arcuate rack 13 to rotate, and drives the rotating block 14 to rotate in the rotating ring 16. Through the cooperation of the first gear assembly and the second gear assembly, the angle of the EDM head 11 can be conveniently adjusted to perform deposition repairs at different positions, and when rotating, it can be ensured to be within the internal range of the upper sealing plate 4. When rotating, the elastic sealing ring coated on the surface of the rotating ring 16 of the rotating block 14 can ensure proper sealing effect.

[0038] The upper cover 5 and the lower cover 6 are both made of transparent materials, and the bottom of the lower cover 6 is provided with a friction strip that is interference-fitted with the repair platform 1, which can ensure sealing during movement.

[0039] The side edges of the metal corrugated layers 8 are fixedly connected with sealing strips 10 , and when the sealing structures on both sides are pressed against each other, the gaps between the metal corrugated layers 8 are sealed by the sealing strips 10 .

[0040] When the present invention is used

[0041] Sealed chamber construction:

[0042] After the workpiece is positioned on the repair table 1, the electric push rods on both sides drive the lower cover 6 to slide toward the middle. The upper cover 5 is linked with the lower cover 6 through the nitrogen cylinder 7. The metal corrugated layer 8 expands and contracts accordingly, and finally closes with the upper sealing plate 4 to form a closed cavity.

[0043] The sliding groove 19 cooperates with the elastic sealing ring on the side of the upper sealing plate 4 to ensure the airtightness of the sealing cavity.

[0044] Inert gas environment control:

[0045] According to the density of the inert gas ejected from the EDM head 11, for example, if the density of argon is greater than that of air, the upper exhaust pipe 10 is started to quickly extract the air from the top of the cavity; if the gas density is lower, the lower exhaust pipe 9 is switched.

[0046] After vacuuming, stop pumping, and the inert gas sinks to fill the sealed cavity, forming a positive pressure environment, reducing the infiltration of outside air and reducing the amount of gas ejected.

[0047] Multi-angle repair and polishing:

[0048] Axial adjustment: The driving motor drives the first gear 18 to rotate, drives the annular gear ring 17 to make the rotating ring 16 rotate axially, and realizes the positioning of the EDM head 11 along the circumferential direction of the workpiece.

[0049] Radial adjustment: The second gear 12 drives the arc-shaped rack 13, which drives the rotating block 14 to swing radially in the rotating ring 16, thereby adjusting the tilt angle of the EDM head 11 to adapt to the repair of complex curved surfaces.

[0050] During the adjustment process, the elastic sealing ring between the rotating block 14 and the rotating ring 16 maintains local sealing to prevent gas leakage.

[0051] Dynamic sealing and resetting:

[0052] When the EDM head 11 is processed, the movable frame 3 is lifted and lowered by the motor screw, the upper sealing plate 4 squeezes the metal corrugated layer 8 to follow the movement, and the nitrogen cylinder 7 balances the pressure and assists in resetting to ensure that the sealing cavity is always fitted.

[0053] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An integrated electrospark deposition repair and polishing device, comprising a repair platform (1) and a bracket (2) arranged above the repair platform (1), wherein the surface of the bracket (2) is connected to a movable frame (3) in a transmission manner, the surface of the movable frame (3) is fixedly connected to an upper sealing plate (4), and the inner cavity of the upper sealing plate (4) is provided with an electrospark head (11) via a transmission mechanism, characterized in that: Both sides of the repair platform (1) are slidably connected to a sealing structure that forms a sealing member with the upper sealing plate (4); The sealing structure comprises a lower cover (6) driven by an electric push rod on the surface of a repair platform (1); an upper cover (5) connected via a nitrogen cylinder (7) is provided on the top of the lower cover (6); the upper cover (5) and the lower cover (6) are connected via a metal corrugated layer (8); and the sides of the upper cover (5) and the lower cover (6) are both provided with an exhaust assembly; A sliding groove (19) is provided on the top of the upper cover body (5) and is slidably connected to the side of the upper sealing plate (4).

2. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The side of the upper sealing plate (4) is covered with an elastic sealing ring.

3. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The vacuum assembly comprises an upper vacuum pipe (10) connected to the vacuum pump assembly, one end of the upper vacuum pipe (10) is connected to the inner cavity of the upper cover body (5), the surface of the upper vacuum pipe (10) is connected to the lower vacuum pipe (9) through a solenoid valve, and the lower vacuum pipe (9) is connected to the lower cover body (6).

4. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The transmission mechanism comprises a rotating ring (16) rotatably connected to the inner cavity of the upper sealing plate (4), the rotating ring (16) is driven to rotate axially on the surface of the upper sealing plate (4) by a first gear assembly, the inner cavity of the rotating ring (16) is rotatably connected to a rotating block (14), the rotating block (14) is driven to rotate radially in the rotating ring (16) by a second gear assembly, both sides of the rotating block (14) are provided with arc surfaces (15) adapted to the inner cavity of the rotating ring (16), the inner cavity of the rotating block (14) is provided with a mounting groove (20) for placing an electric spark machine head (11), and the electric spark machine head (11) is fixed inside the mounting groove by interference fit.

5. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The first gear assembly comprises an annular gear ring (17) fixed above the rotating ring (16) and a driving motor fixed on the side of the moving frame (3); a piston end of the driving motor is fixedly connected to a first gear (18) meshing with the annular gear ring (17).

6. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The second gear assembly comprises an arc-shaped rack (13) fixed on the top of the rotating block (14) and a fixed ring (21) fixed on the surface of the electric spark machine head (11); the inner cavity of the fixed ring (21) is rotatably connected to a second gear (12) driven by a motor, and the second gear (12) is meshed with the arc-shaped rack (13).

7. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The upper cover body (5) and the lower cover body (6) are both made of transparent materials, and the bottom of the lower cover body (6) is provided with a friction strip that is interference-fitted with the repair platform (1).

8. The integrated electrospark deposition repair and polishing device according to claim 1, characterized in that: The side edges of the metal corrugated layers (8) are fixedly connected with sealing strips (10), and when the sealing structures on both sides are pressed against each other, the gaps between the metal corrugated layers (8) are sealed by the sealing strips (10).

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