An electric spark perforating device

Abstract

The present invention provides an electric spark perforating device, including a lifting platform, a perforating head is lifted and lowered on one side of the lifting platform by a lifting mechanism, the perforating head is lifted and lowered in a head protective cover, and a sealing block is also lifted and lowered on the bottom of the lifting platform, the sealing block is received in the bottom space of the head protective cover in the absence of external force, and the sealing block is pressed against the surface of the workpiece to be perforated under the push of the perforating head; a sealing gasket is provided on the side where the sealing block is pressed against the surface of the workpiece to be perforated, and the perforation formed by the workpiece to be perforated is refluxed to the inside of the expanded sealing section, the present invention seals the perforation formed in the workpiece during the perforation process to the external environment, and uses a reflux pump to recover the fluid pumped out of the processing electrode, thereby greatly reducing the pumping flow rate of the fluid in the event of particle blockage, and can quickly correct the bent processing electrode, effectively solving the problems of fluid splashing and recycling and bending of the processing workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of electric spark perforation, in particular to an electric spark perforation device. Background Art

[0002] The prior art discloses an electrospark punching detection device with the publication number "CN107876911A", comprising a base, a lifting and rotating head, a processing electrode and a movable platform, wherein the processing electrode is arranged at the bottom of the lifting and rotating head, the movable platform is arranged on the base and is located below the processing electrode, a protective cover is arranged on the periphery of the movable platform, an opening is arranged on one side of the protective cover, an infrared detector is arranged on the outer side of one side of the protective cover with the opening, the sensing head of the infrared detector extends into the side wall of the protective cover, and two horizontally arranged support bars are arranged on the upper end surface of the movable platform, the support bars are arranged along the front and rear directions, and the sensing head of the infrared detector is aligned between the two support bars. The above device can effectively avoid system misjudgment, greatly improve the accuracy of recognition, and is of great significance for the electrospark punching equipment to truly achieve fully automatic punching, improve labor efficiency, and create more labor value.

[0003] However, the above-mentioned electrospark perforation equipment penetration detection device still has obvious defects during use: since the electrospark perforation equipment needs to apply high-voltage conductive fluid to the arc discharge point through the processing electrode during operation, the fluid plays the role of conductivity, cooling and timely flushing out the particles generated in the perforation process. However, since the gap formed between the processing electrode and the workpiece during the perforation process is small, it is possible that the particles cannot be flushed out in time. If the particles cannot be removed in time, it will have a direct impact on the perforation depth efficiency. Therefore, in order to ensure the flushing effect, the existing technology usually increases the liquid flow rate by increasing the pressure of the pumped fluid. However, this method will lead to an increase in the flow rate per unit time, resulting in a large amount of fluid waste. On the other hand, the high flow rate will cause the fluid to splash, thereby affecting the operation and even causing damage to the electrospark perforation equipment. In addition, the head end of the processing electrode may be bent during use. If the processing electrode is not corrected in time, it will lead to problems such as scrapping of the processing electrode and unqualified processing aperture. Summary of the Invention

[0004] The object of the present invention is to provide an electrospark perforation device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An electric spark perforating device comprises a lifting platform, a perforating head is provided on one side of the lifting platform in a lifting manner through a lifting mechanism, the perforating head is lifted and arranged in a head protective cover, the head protective cover is fixedly mounted on one side of the lifting platform, a processing electrode is inserted into the bottom of the perforating head, the processing electrode rotates around its own axis under the drive of the rotating mechanism provided in the perforating head, the processing electrode is a hollow processing electrode tube connected at both ends, a flushing device for pumping high-pressure conductive fluid into the processing electrode is also provided in the perforating head, a sealing block is also lifted and arranged at the bottom of the lifting platform, the sealing block The sealing block is received in the bottom space of the machine head protective cover in the absence of external force, and through-hole sections for the machining electrode to enter and exit are provided at the upper and lower ends of the sealing block, and the through-hole section includes a bending correction section and a flaring sealing section. The end of the machining electrode away from the punching head is in the bending correction section when the machine is stopped, and a sealing piston ring for the machining electrode to pass through is further provided at the connection between the bending correction section and the flaring sealing section. An extrusion spring is fixedly connected to the bottom of the punching head, and the punching head movably abuts against the sealing block through the extrusion spring during the descending process, and the sealing block abuts against the surface of the workpiece to be punched under the push of the punching head;

[0007] A sealing gasket is provided on one side of the sealing block that abuts against the surface of the workpiece to be punched, and a sealing hole with an aperture larger than the cross-section of the machining electrode is provided at the axis center of the sealing gasket. After the high-pressure conductive fluid pumped in through the punching head flows out from the lower end of the machining electrode, it flows back to the inside of the expanded sealing section through the sealing hole through the perforation formed in the workpiece to be punched. A reflux hole is also provided on the sealing block on one side of the expanded sealing section. The reflux hole is connected to the reflux filter box through a reflux pipe, and a reflux pump is provided on the reflux pipe to pump the liquid in the expanded sealing section into the reflux filter box.

[0008] Preferably, the lifting mechanism that drives the punch head to perform lifting motion includes but is not limited to a screw lifting mechanism or a pneumatic lifting mechanism.

[0009] Preferably, the sealing block is fixedly connected to the machine head protective cover through a traction spring. The traction spring causes the sealing block to shrink inside the machine head protective cover in the absence of external force. When the extrusion spring and the sealing block are movably abutted, as the punching head descends, the elastic force generated by the extrusion spring overcomes the restoring force of the traction spring and does work to cause the sealing block to protrude from the inside of the machine head protective cover and finally abut against the surface of the workpiece to be punched.

[0010] Preferably, the lifting platform is fixedly installed on the operating table through a bracket, and a control console for controlling punching parameters is fixedly connected to one side of the bracket. A clamping table is also slidably provided on one side of the operating table, and the workpiece to be punched is fixed to the bottom of the punching machine head through the clamping table.

[0011] Preferably, the fixture table is also provided with a barrier to prevent liquid from overflowing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention seals the perforations formed during the perforation process of the workpiece from the external environment and utilizes a reflux pump to recover the fluid pumped out from the processing electrode. This reflux method can quickly attract and recover the fluid and particles generated by the perforation, and can reduce the pumping rate of the fluid while greatly reducing particle blockage, effectively solving the problem of fluid splashing and recycling.

[0014] 2. The bending correction section formed inside the sealing block of the present invention can also quickly correct the bent processing electrode, preventing it from being scrapped or having unqualified perforations due to bending during the perforation process.

[0015] The present invention seals the perforations formed in the workpiece during the perforation process to the external environment, and uses a reflux pump to recover the fluid pumped out from the processing electrode, thereby greatly reducing the pumping flow rate of the fluid in the event of particle blockage. At the same time, it can quickly correct the bent processing electrode, effectively solving the problems of fluid splashing and recycling and bending of the processed workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of the electrode perforation working state of the present invention;

[0017] Figure 2 Schematic diagram of the fluid return path of the present invention;

[0018] Figure 3 This is a schematic diagram of the connection structure of the punch head of the present invention;

[0019] Figure 4 This is a schematic diagram of the enlarged structure of region A of the present invention;

[0020] Figure 5 It is a schematic side view of the overall structure of the present invention;

[0021] Figure 6 It is a schematic three-dimensional diagram of the overall structure of the present invention.

[0022] In the figure: 1 lifting platform, 2 punching head, 3 head protection cover, 4 processing electrode, 5 sealing block, 6 through-hole section, 7 bending correction section, 8 flaring sealing section, 9 sealing piston ring, 10 extrusion spring, 11 workpiece to be punched, 12 sealing gasket, 13 sealing hole, 14 reflux hole, 15 reflux pipe, 16 reflux filter box, 17 reflux pump, 18 traction spring, 19 bracket, 20 operating table, 21 control console, 22 fixture table, 23 enclosure. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-6 , the present invention provides a technical solution:

[0025] Example 1:

[0026] An electric spark perforating device includes a lifting platform 1, a perforating head 2 is provided on one side of the lifting platform 1 by a lifting mechanism, the perforating head 2 is lifted and arranged in a head protective cover 3, the head protective cover 3 is fixedly installed on one side of the lifting platform 1, a processing electrode 4 is inserted at the bottom of the perforating head 2, the processing electrode 4 rotates around its own axis under the drive of the rotating mechanism provided in the perforating head 2, the processing electrode 4 is a hollow processing electrode tube connected at both ends, and a flushing device for pumping high-pressure conductive fluid into the processing electrode 4 is also provided in the perforating head 2, and a sealing block 5 is also provided at the bottom of the lifting platform 1. The sealing block 5 is lifted and arranged when there is no external force. Under the action of the punching head 2, it is accommodated in the bottom space of the head protective cover 3. The upper and lower ends of the sealing block 5 are penetrated by a through-hole section 6 for the processing electrode 4 to enter and exit. The through-hole section 6 includes a bending correction section 7 and a flaring sealing section 8. The end of the processing electrode 4 away from the punching head 2 is in the bending correction section 7 when it is stopped. A sealing piston ring 9 for the processing electrode 4 to pass through is also provided at the connection between the bending correction section 7 and the flaring sealing section 8. An extrusion spring 10 is fixedly connected to the bottom of the punching head 2. During the descent process, the punching head 2 is movably abutted against the sealing block 5 through the extrusion spring 10. The sealing block 5 is pushed against the surface of the workpiece 11 to be punched by the punching head 2;

[0027] A sealing gasket 12 is provided on one side of the sealing block 5 that abuts against the surface of the workpiece 11 to be punched, and a sealing hole 13 with an aperture larger than the cross-section of the processing electrode 4 is provided at the axial center of the sealing gasket 12. After the high-pressure conductive fluid pumped in through the punching head 2 flows out from the lower end of the processing electrode 4, it passes through the perforation formed in the workpiece 11 to be punched and flows back to the inside of the expanded sealing section 8 through the sealing hole 13. A reflux hole 14 is also provided on the sealing block 5 on one side of the expanded sealing section 8. The reflux hole 14 is connected to the reflux filter box 16 through a reflux pipe 15. The reflux pipe 15 is provided with a reflux pump 17 for pumping the liquid in the expanded sealing section 8 into the reflux filter box 16.

[0028] In this embodiment, the punching head 2 is installed on one side of the lifting platform 1, and the punching head 2 drives the processing electrode 4 to move up and down by lifting. The lifting mechanism that drives the punching head 2 to move up and down includes but is not limited to a screw lifting mechanism or a pneumatic lifting mechanism. The processing electrode 4 forms an arc discharge with the workpiece 11 during the descent process to form a perforation. As the punching head 2 descends, the processing electrode 4 is able to descend and continuously form a perforation extending to the inside of the workpiece 11 to be punched. The processing electrode 4 rotates synchronously with the rotation of the punching head 2 during the punching process. At the same time, in order to cool the workpiece, the processing electrode 4 is designed to be a hollow processing electrode tubular structure with both ends connected. By pumping a conductive solution into the processing electrode 4 at one end of the punching head 2, the conductive The solution flows out at a high speed through the perforated end of the processing electrode 4. During the impact of the conductive solution, the particles formed by the perforation can be flushed out in time. The rotation, lifting and pumping devices of the processing electrode 4 are all technical structures disclosed in the art, and their specific working mechanisms are no longer repeated. What is different from the prior art is that a lifting sealing block 5 is also provided at the bottom of the lifting platform 1. The upper and lower ends of the sealing block 5 are provided with through-hole sections 6 for the processing electrode 4 to enter and exit. The processing electrode 4 passes through the bottom of the sealing block 5 during the lifting process, and is in the bending correction section 7 when it is corrected or stopped. On the one hand, it forms a protection for the processing electrode 4. On the other hand, when the front end of the processing electrode 4 is bent, the processing electrode 4 is retracted to the bending correction section 7 and rotated. , the bent part can be corrected, and in the punching process, the punch head 2 descends and pushes the sealing block 5 against the surface of the perforated workpiece 11, and the surface of the perforated part is sealed by the sealing gasket 12, so that the conductive solution pumped out from the processing electrode 4 can flow back to the inside of the expanded sealing section 8 through the sealing hole 13. At this time, a reflux hole 14 connected to the inside of the expanded sealing section 8 is provided on one side of the sealing hole 13, and the liquid inside the expanded sealing section 8 is pumped into the reflux filter box 16 by the reflux pump 17, so that the closed-loop circulation of the conductive solution can be realized. The negative pressure adsorption force generated by the reflux pump 17 can quickly extract the solution in the perforated area to the expanded sealing section 8, thereby accelerating the liquid circulation speed, which is conducive to timely The particles formed in the perforation area are flushed out, thereby preventing the risk of blockage in the perforation area and ensuring the normal operation of the processing electrode 4. At the same time, this closed-loop circulation method strictly limits the flow range of the conductive solution, solves the problem of liquid splashing, and optimizes the processing environment. In addition, the sealing gasket 12 is made of flexible rubber material, and the sealing hole 13 formed by it has a small aperture, which can effectively adhere to flat surfaces, curved surfaces, etc., ensuring that the conductive solution reflux process can proceed normally. When the workpiece 11 to be perforated needs to be through-drilled, when the processing electrode 4 penetrates the workpiece, a small amount of conductive solvent will splash. In order to prevent the solution from splashing and flowing, a barrier 23 is also set on the fixture table 22 to prevent liquid splashing.

[0029] Example 2:

[0030] In this embodiment, the sealing block 5 is fixedly connected to the machine head protective cover 3 by a traction spring 18. The traction spring 18 causes the sealing block 5 to shrink into the machine head protective cover 3 in the absence of external force. When the extrusion spring 10 and the sealing block 5 are movably abutted, as the punching head 2 descends, the elastic force generated by the extrusion spring 10 overcomes the restoring force of the traction spring 18 and does work to cause the sealing block 5 to protrude from the inside of the machine head protective cover 3 and finally abut against the surface of the workpiece to be punched 11. Similarly, when the punching head 2 retracts, the extrusion spring 10 disengages from the abutment against the sealing block 5. At this time, the sealing block 5 again retreats into the machine head protective cover 3 under the action of the traction spring 18. In this way, after the processing is completed, the sealing block 5 is separated from the contact with the workpiece 11 to be processed, which facilitates the fixation or removal of the workpiece.

[0031] Example 3:

[0032] In this embodiment, the lifting platform 1 is fixedly mounted on the operating table 20 via a bracket 19. A control console 21 for controlling the punching parameters is also fixedly connected to one side of the bracket 19. A clamp table 22 is also slidably provided on one side of the operating table 20. The workpiece 11 to be punched is fixed to the bottom of the punching head 2 through the clamp table 22. The lifting platform 1 is fixedly connected to the operating table 20 via the bracket 19. The control console 21 is used to adjust various processing parameters, such as processing depth, fluid pumping flow rate, descent speed and other parameters. This design method is a commonly used method in the prior art. The workpiece 11 to be punched is fixed by installing the clamp table 22 on the operating table 20.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electrospark perforating device, comprising a lifting platform, a perforating head being lifted and lowered on one side of the lifting platform by a lifting mechanism, the perforating head being lifted and lowered within a head protection cover, the head protection cover being fixedly mounted on one side of the lifting platform, a processing electrode being inserted into the bottom of the perforating head, the processing electrode being driven by a rotating mechanism within the perforating head to rotate about its own axis, the processing electrode being a hollow processing electrode tube with both ends connected, the perforating head also being provided with a flushing device for pumping a high-pressure conductive fluid into the processing electrode, characterized in that: A sealing block is also provided at the bottom of the lifting platform in a lifting manner. The sealing block is stored in the bottom space of the machine head protective cover without the action of external force. Through-hole sections for the processing electrode to enter and exit are provided at the upper and lower ends of the sealing block. The through-hole section includes a bending correction section and a flaring sealing section. The processing electrode is in the bending correction section at the end away from the punching head when the machine is stopped. A sealing piston ring for the processing electrode to pass through is also provided at the connection between the bending correction section and the flaring sealing section. An extrusion spring is fixedly connected to the bottom of the punching head. The punching head movably abuts against the sealing block through the extrusion spring during the descending process. The sealing block abuts against the surface of the workpiece to be punched under the push of the punching head. A sealing gasket is provided on one side of the sealing block that abuts against the surface of the workpiece to be punched, and a sealing hole with a diameter larger than the cross-section of the machining electrode is opened at the axis center of the sealing gasket. After the high-pressure conductive fluid pumped in through the punching head flows out from the lower end of the machining electrode, it flows back through the perforation formed in the workpiece to be punched through the sealing hole to the inside of the expanded sealing section. A reflux hole is also provided on the sealing block on one side of the expanded sealing section. The reflux hole is connected to the reflux filter box through a reflux pipe, and a reflux pump is provided on the reflux pipe to pump the liquid in the expanded sealing section into the reflux filter box. The sealing block is fixedly connected to the machine head protective cover by a traction spring. The traction spring causes the sealing block to shrink inside the machine head protective cover in the absence of external force. When the extrusion spring and the sealing block are movably abutted, as the punching head descends, the elastic force generated by the extrusion spring overcomes the restoring force of the traction spring and does work to cause the sealing block to protrude from the inside of the machine head protective cover and finally abut against the surface of the workpiece to be punched.

2. The electrospark perforation device according to claim 1, characterized in that: The lifting mechanism that pushes the punch head to perform lifting motion includes a screw lifting mechanism or a pneumatic lifting mechanism.

3. The electrospark perforation device according to claim 2, characterized in that: The lifting platform is fixedly installed on the operating table through a bracket. A control console for controlling punching parameters is fixedly connected to one side of the bracket. A clamping table is also slidably provided on one side of the operating table. The workpiece to be punched is fixed to the bottom of the punching machine head through the clamping table.

4. The electrospark perforation device according to claim 3, characterized in that: The fixture table is also provided with a barrier to prevent liquid from overflowing.

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