High-voltage isolating switch contact integrated forming tool

Abstract

The application relates to the field of isolating switch contacts, in particular to a high-voltage isolating switch contact integrated forming tool. The high-voltage isolating switch contact integrated forming tool comprises a machine body, a male die assembly connected to the machine body, a female die assembly installed on the machine body and located below the male die assembly, a side pressing assembly installed on the machine body and connected with the female die assembly, the side pressing assembly being used for cooperating with the female die assembly and the male die assembly to stamp the side surface of the contact, and a scraping assembly installed on the machine body and connected with the female die assembly. After pre-pressing and filling, the copper powder in the cavity is simultaneously stamped and densified by the cooperation of the upper die head, the lower stamping block and the two side stamping blocks, so that the horizontal plate, the vertical plate and the connecting part of the two parts are subjected to preset stamping force, the density of the horizontal plate, the vertical plate and the connecting part of the two parts of the formed green body is uniform, and the quality of the final contact product is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of disconnector switch contacts, and more particularly to a tooling for integrally molding high-voltage disconnector switch contacts. Background Technology

[0002] In the existing technology, the contacts of high-voltage disconnect switches are welded together by two copper plates, one horizontal and one vertical. When a huge short-circuit current flows through the contacts, the welded joint, as a weak area in mechanical performance, is very easy to break due to being unable to withstand the instantaneous electrodynamic and thermal stress. In traditional powder stamping integrated molding equipment, the upper die is directly stamped with the die core, resulting in problems such as low density at the connection between the horizontal and vertical plates and at the end of the vertical plate, collapse or breakage after sintering. Summary of the Invention

[0003] In order to overcome the shortcomings of traditional powder stamping integrated molding equipment, where the upper die is directly stamped with the die core, resulting in low density at the connection between the horizontal and vertical plates and at the end of the vertical plate, and collapse or breakage after sintering, this invention provides an integrated molding tooling for high-voltage disconnect switch contacts.

[0004] Technical solution: A tooling for integrally molding high-voltage disconnector contacts, comprising: The machine body has a punch assembly connected to it; a die assembly is mounted on the machine body and located below the punch assembly; a side pressing assembly is mounted on the machine body and connected to the die assembly, the side pressing assembly is used to cooperate with the die assembly and the punch assembly to press the side of the contact; and a scraping assembly is mounted on the machine body and connected to the die assembly, the scraping assembly is used to scrape off powder adhering to the side pressing assembly; wherein, the contact includes a horizontal plate and a vertical plate, the horizontal plate is provided with two first through holes and two second through holes.

[0005] To further explain, the punch assembly includes a first hydraulic cylinder mounted on the machine body, an upper die base fixedly connected to the telescopic end of the first hydraulic cylinder, and an upper die head detachably connected to the upper die base.

[0006] Further explanation: the die assembly includes a lower die base detachably connected to the machine body, a lower die frame detachably connected to the lower die base, a lower die core detachably connected to the lower die base, and two first pillars and two second pillars fixedly connected to the lower die core; wherein, the lower die core is provided with a cavity for forming the horizontal plate and the vertical plate, the two first pillars correspond to the two second through holes, the two second pillars correspond to the two first through holes, and the lower side of the upper die head is provided with blind holes corresponding to the two first pillars and the two second pillars, the depth of the blind holes being greater than the exposed height of the first and second pillars after the contact is stamped.

[0007] Further explanation: the concave mold assembly also includes a plurality of first electric push rods installed in the lower mold core, a top plate connected to the telescopic ends of the plurality of first electric push rods, and a receiving plate magnetically connected to the top plate; wherein, the upper surface of the receiving plate is provided with an anti-stick coating, the lower side of the receiving plate is provided with a plurality of magnetic blocks embedded in the top plate, the top plate is made of magnetic material, the top plate and the receiving plate are both slidably connected to the lower mold core, the top plate and the receiving plate are both slidably connected to two first pillars and two pillars, and both the top plate and the receiving plate have notches matching the size of the horizontal plate, the height of the two first pillars and the two second pillars protruding from the receiving plate is greater than the depth of the first through hole and the second through hole.

[0008] Further explanation: the side pressure assembly includes two centrally symmetrical side pressure units, both of which are connected to the machine body. Each side pressure unit includes a second hydraulic cylinder fixed to the machine body via a mounting block, a side stamping block fixed to the telescopic end of the second hydraulic cylinder, and a venting module connected to the side stamping block. The side stamping block is provided with a first venting groove and a second venting groove, and the stamping end face of the side stamping block is provided with a plurality of exhaust holes communicating with the first venting groove. The venting module works in conjunction with the first venting groove and the second venting groove.

[0009] Further explanation: The ventilation module includes an air extraction pipe communicating with the first ventilation slot, a second electric push rod fixedly connected to the side stamping block via a mounting block, and a slide rod fixedly connected to the telescopic end of the second electric push rod via a connecting block; wherein, the slide rod is slidably connected to the side stamping block, the diameter of the slide rod is smaller than the diameter of the second ventilation slot, and the initial state of the end of the slide rod is flush with the stamping end face of the side stamping block.

[0010] Further explanation: The scraping assembly includes several third hydraulic cylinders mounted on the machine body, a lower punch block fixedly connected to the telescopic ends of the several third hydraulic cylinders, and four scraping units connected to the lower punch block; wherein, the width of the upper end face of the lower punch block is the same as the width of the vertical plate, the upper part of the lower punch block is provided with a concave portion, and a scraping unit is provided on each of the four sides of the concave portion, and the two scraping units on the front and rear sides each correspond to one of the side punch blocks.

[0011] Further explanation: the scraping unit includes several elastic elements fixedly connected to the concave portion and a scraper block fixedly connected to all the elastic elements; wherein, the lower punch block is slidably connected to the lower die core, the concave portion of the lower punch block is provided with a sliding groove matching the scraper block, the scraper block is slidably connected to the lower punch block, the upper and lower sides of the scraper block are provided with mutually symmetrical wedges, the scraper block initially abuts against the lower die core, and the several elastic elements are initially in a compressed state.

[0012] Further explanation: The system also includes a powder feeding assembly mounted on the machine body. This assembly comprises a mounting bracket fixed to the machine body, an electric actuator connected to the mounting bracket, a powder lowering plate fixed to the electric actuator via a connecting block, and a pusher plate fixed to the electric actuator via a connecting block. The powder lowering plate has a powder lowering groove and a powder discharge hole communicating with the powder lowering groove. The pusher plate is slidably connected to the powder lowering plate. The powder lowering plate has a connecting pipe communicating with the powder lowering groove. The powder lowering plate is slidably connected to the lower mold base and the lower mold core. The electric actuator consists of an electric slide rail and two electric sliders, which are respectively fixed to the powder lowering plate and the pusher plate. Initially, the powder lowering plate is in a sealed state, fitting against the inner wall of the notch on the top plate and the receiving plate.

[0013] Further explanation: The lower stamping block is provided with a suction chamber, and the lower stamping block has a number of suction holes on its four sides (front, back, left, and right) that communicate with the suction chamber. The suction chamber is connected to two connecting pipes, and each of the two connecting pipes is connected to one of the air extraction pipes. All the suction holes are located in the concave portion and below the corresponding scraping unit. Each connecting pipe and each air extraction pipe is provided with a control valve. The connecting pipe is a telescopic flexible hose, and the machine body is provided with a groove corresponding to the connecting pipe to facilitate the movement of the connecting pipe.

[0014] The beneficial effects of this invention are as follows: 1. After pre-pressing and filling, the copper powder in the cavity is simultaneously pressed and compacted by the upper die head, lower punch block and two side punch blocks. This ensures that the horizontal plate, vertical plate and the connection between the two parts are subjected to the preset punching force, so that the density of the horizontal plate, vertical plate and the connection between the two parts of the green blank is uniform after molding, thereby ensuring the quality of the final contact product.

[0015] 2. After stamping is completed, first control the extension of the second electric push rod to move the slide rod a preset distance so that the second ventilation groove is connected to the lower mold core cavity, which facilitates the separation of the two side stamping blocks from the formed blank. Then control the retraction of the two second hydraulic cylinders to separate the two side stamping blocks from the formed blank, reduce the friction force on the vertical plate when the blank is demolded, and reduce the risk of damage when the blank is demolded.

[0016] 3. The scraping component scrapes off the trace amounts of copper powder adhering to the end faces of the two side stamping blocks. At the same time, the suction pipe is activated through the external dust collection device connected to the telescopic hose. The control valve on the suction pipe is closed, and the control valve on the connecting pipe is opened. Then, the suction hole connected to the suction chamber through the connecting pipe generates suction force to suck out the scraped copper powder and collect it uniformly. This avoids the problem of uneven density or even delamination of the green blank due to the gradual thickening of the adhesion layer as the number of pressing times increases. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the contact. Figure 4 This is a schematic diagram of the combined structure of the upper mold base and the upper mold head of the present invention; Figure 5 This is a schematic diagram of the combined structure of the die assembly, side pressing assembly, and powder feeding assembly of the present invention; Figure 6 This is a partial cross-sectional view of the present invention; Figure 7 This is a cross-sectional view of the side stamping block of the present invention; Figure 8 This is a partial assembly diagram of the present invention; Figure 9 This is a schematic diagram of the scraping component structure of the present invention; Figure 10 This is a schematic diagram of the powder feeding component structure of the present invention.

[0018] In the attached diagrams: 001-Contact, 0011-Horizontal plate, 0012-Vertical plate, 0013-First through hole, 0014-Second through hole, 1-Main body, 2-First hydraulic cylinder, 3-Upper mold base, 4-Upper mold head, 5-Lower mold base, 6-Lower mold frame, 7-Lower mold core, 701-First column head, 702-Second column head, 8-First electric push rod, 9-Top plate, 10-Receiving plate, 11-Second hydraulic cylinder, 12-Side stamping block, 1201-First vent groove, 1 202-Second vent groove, 13-Sealing ring, 14-Second electric push rod, 15-Slide rod, 16-Suction pipe, 1601-Connecting pipe, 17-Third hydraulic cylinder, 18-Lower punch block, 1801-Suction chamber, 1802-Suction hole, 1803-Concave part, 19-Scraper block, 20-Elastic element, 21-Mounting bracket, 22-Electric actuator, 23-Lower powder plate, 2301-Lower powder trough, 2302-Powder discharge hole, 24-Connecting pipe, 25-Push plate. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0020] Example according to Figures 1-10As shown, this embodiment provides an integral molding fixture for a high-voltage disconnector contact 001, including a body 1, a die assembly, a side pressing assembly, and a scraping assembly: wherein, the body 1 has a punch assembly connected to it; the die assembly is mounted on the body 1 and located below the punch assembly; the side pressing assembly is mounted on the body 1 and connected to the die assembly, and the side pressing assembly is used to cooperate with the die assembly and the punch assembly to punch the side of the contact 001; the scraping assembly is mounted on the body 1 and connected to the die assembly, and the scraping assembly is used to scrape off powder adhering to the side pressing assembly; The contact 001 includes a horizontal plate 0011 and a vertical plate 0012. The horizontal plate 0011 has two first through holes 0013 and two second through holes 0014. During operation, copper powder is stamped by a punch assembly, a die assembly, and a side pressing assembly to form a green contact 001. After the green contact 001 is demolded, it is sintered by an external sintering device to obtain a one-piece finished contact 001.

[0021] The punch assembly includes a first hydraulic cylinder 2 mounted on the machine body 1, an upper die base 3 fixedly connected to the telescopic end of the first hydraulic cylinder 2, and an upper die head 4 detachably connected to the upper die base 3. The detachable connection design facilitates the individual replacement of the upper die head 4, reducing costs.

[0022] The die assembly includes a lower die base 5 detachably connected to the body 1, a lower die frame 6 detachably connected to the lower die base 5, a lower die core 7 detachably connected to the lower die base 5, and two first pillars 701 and two second pillars 702 fixedly connected to the lower die core 7. The lower die core 7 has cavities for forming the horizontal plate 0011 and the vertical plate 0012. Two first pillars 701 correspond to two second through holes 0014, and two second pillars 702 correspond to two first through holes 0013. The lower side of the upper die head 4 has blind holes corresponding to the two first pillars 701 and two second pillars 702. The depth of the blind holes is greater than the exposed height of the first pillars 701 and second pillars 702 after the contact 001 is stamped. The lower die frame 6 protects the lower die core 7, preventing direct impact from damage to the punch assembly. The two first pillars 701 and two second pillars 702, in conjunction with the blind holes on the lower side of the upper die head 4, form corresponding second through holes 0014 and first through holes 0013 on the contact 001 blank after copper powder stamping.

[0023] The concave mold assembly also includes a plurality of first electric push rods 8 installed in the lower mold core 7, a top plate 9 connected together with the telescopic ends of the plurality of first electric push rods 8, and a receiving plate 10 magnetically connected to the top plate 9. The upper surface of the receiving plate 10 is provided with an anti-stick coating, which is a boron nitride or aluminum oxide coating. Several magnetic blocks embedded in the top plate 9 are provided on the lower side of the receiving plate 10. The top plate 9 is made of magnetic material. The top plate 9 and the receiving plate 10 are slidably connected to the lower mold core 7. The top plate 9 and the receiving plate 10 are slidably connected to the two first column heads 701 and the second column head 702. The top plate 9 and the receiving plate 10 are both provided with notches that match the size of the horizontal plate 0011. The height of the two first column heads 701 and the two second column heads 702 protruding from the receiving plate 10 is greater than the depth of the first through hole 0013 and the second through hole 0014. The receiving plate 10 is used as a replacement component for the peripheral device. The receiving plate 10 is magnetically connected to the top plate 9 by a magnetic block, which ensures the stability and accuracy of the connection between the receiving plate 10 and the top plate 9. By providing an anti-stick coating on the upper surface of the receiving plate 10, it is easy to demold the contact 001 after sintering.

[0024] The side pressure assembly includes two centrally symmetrical side pressure units, both of which are connected to the body 1. Each side pressure unit includes a second hydraulic cylinder 11 fixed to the body 1 via a mounting block, a side punching block 12 fixed to the telescopic end of the second hydraulic cylinder 11, and a ventilation module connected to the side punching block 12. The side stamping block 12 is provided with a first venting groove 1201 and a second venting groove 1202. The stamping end face of the side stamping block 12 is provided with a plurality of exhaust holes communicating with the first venting groove 1201. The ventilation module works in conjunction with the first venting groove 1201 and the second venting groove 1202. During the stamping process, air in the cavity is discharged through the exhaust holes, the first venting groove 1201, and the ventilation module.

[0025] The ventilation module includes an air extraction pipe 16 connected to the first ventilation slot 1201, a second electric push rod 14 fixedly connected to the side stamping block 12 via a mounting block, and a slide rod 15 fixedly connected to the telescopic end of the second electric push rod 14 via a connecting block. The slide rod 15 is slidably connected to the side stamping block 12. The diameter of the slide rod 15 is smaller than the diameter of the second venting groove 1202. Initially, the end of the slide rod 15 is flush with the stamping end face of the side stamping block 12. Before demolding, the slide rod 15 is moved by the retraction of the second electric push rod 14, allowing the outside to communicate with the cavity through the second venting groove 1202, which facilitates the separation of the two side stamping blocks 12 from the green blank.

[0026] The scraping assembly includes a plurality of third hydraulic cylinders 17 mounted on the machine body 1, a lower punch block 18 fixedly connected to the telescopic ends of the plurality of third hydraulic cylinders 17, and four scraping units connected to the lower punch block 18. The lower stamping block 18 is slidably connected to the lower die core 7. The width of the upper surface of the lower stamping block 18 is the same as the width of the vertical plate 0012. The upper part of the lower stamping block 18 is provided with a recessed portion 1803. Each of the four sides of the recessed portion 1803 is provided with a scraping unit. The two scraping units on the front and rear sides each correspond to one of the side stamping blocks 12. The recessed portion 1803 is provided to temporarily accommodate the scraped copper powder.

[0027] The scraping unit includes a plurality of elastic elements 20 fixedly connected to the recess 1803 and a scraping block 19 fixedly connected to all the elastic elements 20. The elastic element 20 is configured as a spring or elastic telescopic rod. The recessed portion 1803 of the lower stamping block 18 has a groove matching the scraper block 19. The scraper block 19 is slidably connected to the lower stamping block 18. Symmetrical wedges are provided on the upper and lower sides of the scraper block 19. Initially, the scraper block 19 abuts against the lower die core 7, and several elastic elements 20 are initially in a compressed state. By providing symmetrical wedges on the upper and lower sides of the scraper block 19, its wedge-shaped portion is compressed when passing through the notches on the top plate 9 and the receiving plate 10, thereby compressing the elastic element 20. This allows the scraper block 19 to smoothly pass through the notches on the top plate 9 and the receiving plate 10 during its up-and-down movement.

[0028] It also includes a powder feeding assembly installed on the machine body 1. The powder feeding assembly includes a mounting frame 21 fixed to the machine body 1, an electric actuator 22 connected to the mounting frame 21, a powder lowering plate 23 fixed to the electric actuator 22 via a connecting block, and a push plate 25 fixed to the electric actuator 22 via a connecting block. The powder lowering plate 23 is provided with a powder lowering groove 2301 and a powder discharge hole 2302 communicating with the powder lowering groove 2301. The push plate 25 is slidably connected to the powder lowering plate 23. The powder lowering plate 23 is provided with a connecting pipe 24 communicating with the powder lowering groove 2301. The powder lowering plate 23 is slidably connected to the lower mold base 5 and the lower mold core 7. The electric actuator 22 is composed of an electric slide rail and two electric sliders. The two electric sliders are respectively fixedly connected to the powder lowering plate 23 and the push plate 25. The initial state of the powder lowering plate 23 is sealed by fitting against the grooved inner wall of the top plate 9 and the receiving plate 10. The push plate 25 is driven to move by the electric actuator 22, so that the push plate 25 pushes the residual copper powder in the powder lowering trough 2301 out of the powder discharge hole 2302, so as to avoid inaccurate material feeding caused by residual copper powder in the powder lowering trough 2301.

[0029] Each of the side stamping blocks 12 is provided with a sealing ring 13 that is slidably connected to the lower die core 7. The sealing ring 13 ensures the sealing between the side stamping block 12 and the lower die core 7, and ensures the suction effect generated when the two side stamping blocks 12 are far apart to assist the copper powder discharge.

[0030] The lower punch block 18 is provided with a suction chamber 1801. The lower punch block 18 is provided with a plurality of suction holes 1802 on its front, back, left and right sides, which are connected to the suction chamber 1801. The suction chamber 1801 is connected to two connecting pipes 1601, and each of the two connecting pipes 1601 is connected to one of the air extraction pipes 16. All suction holes 1802 are located in the recessed portion 1803, and all suction holes 1802 are located below the corresponding scraping unit. Each connecting pipe 1601 and each suction pipe 16 is equipped with a control valve. The connecting pipe 1601 is a telescopic flexible hose, and the body 1 has a groove corresponding to the connecting pipe 1601 to facilitate its movement. Suction is generated through the suction holes 1802 to collect the scraped copper powder.

[0031] During operation, the extraction pipe 16 is connected to a dust collection device via a telescopic hose, and the connecting pipe 24 is connected to a copper powder conveying device via the telescopic hose. The copper powder is introduced into the lower powder trough 2301 through the connecting pipe 24 and discharged into the cavity formed by the two side stamping blocks 12 and the vertical plate 0012 of the lower mold core 7 through the discharge hole 2302. At the same time, the two second hydraulic cylinders 11 are controlled to retract, so that the two side stamping blocks 12 move away from each other to form a suction effect, which assists in the feeding of copper powder. After all the copper powder required for the forming of the contact 001 has been quantitatively fed, the electric actuator 22 drives the push plate 25 to move towards the discharge hole 2302 until the push plate 25 moves to the end of the discharge hole 2302 and abuts against the lower powder plate 23. Then, the push plate 25 pushes the copper powder remaining in the lower powder trough 2301 through the discharge hole 2302. 302 is discharged to prevent residual copper powder in the powder trough 2301 from causing inaccurate copper powder feeding and affecting the final quality of the contact 001. Then, the electric actuator 22 drives the powder plate 23 and the push plate 25 to move synchronously away from the lower die core 7 until the end face of the powder plate 23 is flush with the inner wall of the cavity of the lower die core 7. This allows the end face of the powder plate 23 to participate in the stamping of the contact 001 as part of the inner wall of the cavity of the lower die core 7. During the stamping of the contact 001, the push plate 25 and the powder plate 23 work together to bear the pressure, preventing the powder plate 23 from deforming due to bearing pressure alone. At the same time, the first hydraulic cylinder 2 extends and pushes the upper die base 3 to move the upper die head 4 downward by a preset distance, so that the first column head 701 and the second column head 702 are inserted into the blind hole on the upper die head 4, thereby preventing the subsequent copper powder from being squeezed out. The pressure applied to the ends of the first column head 701 and the second column head 702 causes inaccurate forming of copper powder in the contact 001. At this time, the distance between the lower side of the upper die head 4 and the receiving plate 10 is greater than the thickness of the horizontal plate 0011. Then, the two second hydraulic cylinders 11 extend, causing the two side stamping blocks 12 to move closer to each other and squeeze the copper powder in the corresponding cavity of the vertical plate 0012. At the same time, all the third hydraulic cylinders 17 extend and push the lower stamping block 18 to move upward, thereby squeezing the copper powder through the lower stamping block 18. Then, the two side stamping blocks 12 and the lower stamping block 18 cooperate to pre-compress the copper powder in the corresponding cavity of the vertical plate 0012, so that the vertical plate 0012 is partially pre-formed. As the copper powder is squeezed, the copper powder overflows upward through the notch on the top plate 9 and the receiving plate 10 into the corresponding cavity of the horizontal plate 0011. Inside, the first hydraulic cylinder 2 continues to extend, and then the upper die head 4, lower punch block 18, and two side punch blocks 12 work together to simultaneously punch and shape the copper powder in the cavity. The two side punch blocks 12 cooperate with the lower punch block 18 to pre-extract the copper powder, and cooperate with the upper die head 4 at a preset position, so that the copper powder is squeezed towards the horizontal plate 0011 during pre-pressing, ensuring that the corner where the horizontal plate 0011 and the vertical plate 0012 are connected is filled. After pre-pressing and filling, the upper die head 4, lower punch block 18, and two side punch blocks 12 work together to simultaneously punch and densify the copper powder in the cavity, so that the horizontal plate 0011, the vertical plate 0012, and the connection between the two parts are all subjected to the preset punching force, ensuring that the density of the green blank horizontal plate 0011, vertical plate 0012, and the connection between the two parts is uniform after molding.This ensures the quality of the final contact 001 product, avoiding the problems of uneven powder loading in the horizontal plate 0011 and vertical plate 0012 due to the large difference in height-to-diameter ratio caused by traditional flat-lay filler, and avoiding the problems of low density, collapse, or breakage after sintering at the connection between the horizontal plate 0011 and the vertical plate 0012, and at the end of the vertical plate 0012, caused by the traditional upper die punch directly stamping with the die core.

[0032] During the stamping process, air inside the cavity is discharged through several vent holes connected to the first vent groove 1201 via the connecting pipe 1601. After stamping, the second electric push rod 14 is extended to move the slide rod 15 a preset distance, so that the second vent groove 1202 is connected to the cavity of the lower mold core 7, which facilitates the separation of the two side stamping blocks 12 from the formed green blank. Then, the two second hydraulic cylinders 11 are contracted to separate the two side stamping blocks 12 from the formed green blank, reducing the friction on the vertical plate 0012 during green blank demolding and reducing the risk of damage during green blank demolding. During the stamping venting process, a very small amount of copper powder will enter the vent holes. To ensure smooth venting during subsequent stamping, the dust collection equipment connected to the external telescopic hose through the air extraction pipe 16 is activated. The control valve on the extraction pipe 16 is in the open state, and the control valve on the connecting pipe 1601 is in the closed state. This allows air to be drawn out through the exhaust port in the extraction pipe 16, ensuring unobstructed exhaust. Then, all first electric push rods 8 are extended to push the top plate 9 and the receiving plate 10 upwards. Simultaneously, the first hydraulic cylinder 2 retracts, and all third hydraulic cylinders 17 extend to push the lower punch block 18 upwards, preventing tension at the connection between the horizontal plate 0011 and the vertical plate 0012 during demolding. After the receiving plate 10 rises above the lower mold frame 6, the first hydraulic cylinder 2 continues to retract, separating the upper mold head 4 from the green blank. An external material handling device individually clamps the receiving plate 10, causing the green blank to move upwards and then horizontally, separating the receiving plate 10 from the top plate 9 first, and then causing the receiving plate 10 to move upwards and then horizontally. The green blank separates from the notch in the top plate 9, and then the receiving plate 10 is placed on the external sintering tray along with the green blank. During the entire transfer process, the green blank is prevented from being directly clamped, thus avoiding damage during the transfer. Then, another receiving plate 10 is placed on the top plate 9 for the next green blank transfer. When the lower punch block 18 moves upward, the two scraper blocks 19 corresponding to the inner wall of the cavity are tightly pressed against the inner wall of the cavity due to the elastic force of the elastic element 20. As the lower punch block 18 moves upward, it scrapes away the trace amounts of copper powder adhering to the inner wall of the cavity into the corresponding cavity of the horizontal plate 0011. After the green blank is demolded, the inner wall of the cavity and the copper powder therein are removed by an external dust extraction device. After the green blank is transferred, the trace amounts of copper powder adhering to the lower side of the upper die head 4 and the upper side of the lower punch block 18 are further removed. After suction, all third hydraulic cylinders 17 retract, causing the lower stamping block 18 to descend and reset. At this time, the two second hydraulic cylinders 11 are extended to bring the two side stamping blocks 12 into the forming state. Then, the scraper blocks 19 corresponding to the two side stamping blocks 12 scrape off the trace amounts of copper powder adhering to the end faces of the two side stamping blocks 12 in the same way as described above. At the same time, the vacuum pipe 16 is activated through the external dust collection device connected to the telescopic hose. The control valve on the vacuum pipe 16 is closed, and the control valve on the connecting pipe 1601 is opened. Then, the suction hole 1802 connected to the suction chamber 1801 through the connecting pipe 1601 generates suction force to suck out the scraped copper powder and collect it uniformly. This avoids the problem of uneven density or even delamination of the green blank due to the gradual thickening of the adhesion layer as the number of pressings increases.Then all components are reset to their initial state in preparation for the next stamping cycle.

[0033] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A tooling for integrally molding high-voltage disconnect switch contacts, characterized in that, include: The body (1) is connected to a punch assembly; A die assembly is mounted on the body (1) and located below the punch assembly; A side-pressing assembly, mounted on the body (1) and connected to the die assembly, is used to cooperate with the die assembly and the punch assembly to press the side of the contact (001); and A scraping assembly is mounted on the body (1) and connected to the die assembly. The scraping assembly is used to scrape off powder adhering to the side pressure assembly. The contact (001) includes a horizontal plate (0011) and a vertical plate (0012), and the horizontal plate (0011) is provided with two first through holes (0013) and two second through holes (0014). The punch assembly includes a first hydraulic cylinder (2) mounted on the machine body (1), an upper die base (3) fixedly connected to the telescopic end of the first hydraulic cylinder (2), and an upper die head (4) detachably connected to the upper die base (3). The die assembly includes a lower die base (5) detachably connected to the body (1), a lower die frame (6) detachably connected to the lower die base (5), a lower die core (7) detachably connected to the lower die base (5), and two first pillars (701) and two second pillars (702) fixedly connected to the lower die core (7). The lower die core (7) is provided with a cavity for forming the horizontal plate (0011) and the vertical plate (0012). The two first pillars (701) correspond to the two second through holes (0014), and the two second pillars (702) correspond to the two first through holes (0013). The lower side of the upper die head (4) is provided with blind holes corresponding to the two first pillars (701) and the two second pillars (702). The depth of the blind holes is greater than the exposed height of the first pillars (701) and the second pillars (702) after the contact (001) is stamped. The concave mold assembly also includes a plurality of first electric push rods (8) installed in the lower mold core (7), a top plate (9) connected to the telescopic ends of the plurality of first electric push rods (8), and a receiving plate (10) magnetically connected to the top plate (9). The upper surface of the receiving plate (10) is provided with an anti-stick coating. Several magnetic blocks embedded in the top plate (9) are provided on the lower side of the receiving plate (10). The top plate (9) is made of magnetic material. The top plate (9) and the receiving plate (10) are slidably connected to the lower mold core (7). The top plate (9) and the receiving plate (10) are slidably connected to the two first column heads (701) and the second column head (702). The top plate (9) and the receiving plate (10) are both provided with notches that match the size of the horizontal plate (0011). The height of the two first column heads (701) and the two second column heads (702) protruding from the receiving plate (10) is greater than the depth of the first through hole (0013) and the second through hole (0014). The side pressure assembly includes two centrally symmetrical side pressure units, both of which are connected to the body (1). Each side pressure unit includes a second hydraulic cylinder (11) fixed to the body (1) via a mounting block, a side punch block (12) fixed to the telescopic end of the second hydraulic cylinder (11), and a ventilation module connected to the side punch block (12). The side stamping block (12) is provided with a first venting groove (1201) and a second venting groove (1202). The stamping end face of the side stamping block (12) is provided with a plurality of exhaust holes communicating with the first venting groove (1201). The ventilation module works in conjunction with the first venting groove (1201) and the second venting groove (1202).

2. The high-voltage disconnector contact integral molding tooling according to claim 1, characterized in that, The ventilation module includes an air extraction pipe (16) connected to the first ventilation slot (1201), a second electric push rod (14) fixedly connected to the side punch block (12) via a mounting block, and a slide rod (15) fixedly connected to the telescopic end of the second electric push rod (14) via a connecting block. The slide rod (15) is slidably connected to the side stamping block (12), the diameter of the slide rod (15) is smaller than the diameter of the second ventilation groove (1202), and the initial state of the end of the slide rod (15) is flush with the stamping end face of the side stamping block (12).

3. The high-voltage disconnector contact integral molding tooling according to claim 2, characterized in that, The scraping assembly includes a plurality of third hydraulic cylinders (17) mounted on the body (1), a lower punch block (18) fixedly connected to the telescopic ends of the plurality of third hydraulic cylinders (17), and four scraping units connected to the lower punch block (18). The width of the upper end face of the lower stamping block (18) is the same as the width of the vertical plate (0012). The lower stamping block (18) is slidably connected to the lower die core (7). The upper part of the lower stamping block (18) is provided with a concave part (1803). Each of the four sides of the concave part (1803) is provided with a scraping unit. The two scraping units on the front and rear sides correspond to one of the side stamping blocks (12).

4. The high-voltage disconnector contact integral molding tooling according to claim 3, characterized in that, The scraping unit includes a plurality of elastic elements (20) fixedly connected to the recess (1803) and a scraping block (19) fixedly connected to all the elastic elements (20). The lower stamping block (18) has a groove on its inner recess (1803) that matches the scraper block (19). The scraper block (19) is slidably connected to the lower stamping block (18). The upper and lower sides of the scraper block (19) are provided with mutually symmetrical wedges. The scraper block (19) initially abuts against the lower die core (7), and several elastic elements (20) are initially in a compressed state.

5. The high-voltage disconnector contact integral molding tooling according to claim 4, characterized in that, It also includes a powder feeding assembly installed on the machine body (1), the powder feeding assembly including a mounting frame (21) fixed to the machine body (1), an electric actuator (22) connected to the mounting frame (21), a powder lowering plate (23) fixed to the electric actuator (22) through a connecting block, and a push plate (25) fixed to the electric actuator (22) through a connecting block. The powder lowering plate (23) is provided with a powder lowering groove (2301) and a powder discharge hole (2302) communicating with the powder lowering groove (2301). The push plate (25) is slidably connected to the powder lowering plate (23). The powder lowering plate (23) is provided with a connecting pipe (24) communicating with the powder lowering groove (2301). The powder lowering plate (23) is slidably connected to the lower mold base (5) and the lower mold core (7). The electric actuator (22) is composed of an electric slide rail and two electric sliders. The two electric sliders are fixedly connected to the powder lowering plate (23) and the push plate (25) respectively. The initial state of the lower powder plate (23) is sealed by fitting the inner wall of the groove on the top plate (9) and the receiving plate (10).

6. The high-voltage disconnector contact integral molding tooling according to claim 3, characterized in that, The lower stamping block (18) is provided with a suction chamber (1801). The lower stamping block (18) is provided with a number of suction holes (1802) on its front, back, left and right sides, which are connected to the suction chamber (1801). The suction chamber (1801) is connected to two connecting pipes (1601), and each of the two connecting pipes (1601) is connected to one of the air extraction pipes (16). All of the suction holes (1802) are located in the recess (1803), and all of the suction holes (1802) are located below the corresponding scraping unit. Each of the connecting pipes (1601) and each of the suction pipes (16) is provided with a control valve. The connecting pipe (1601) is configured as a telescopic hose, and the body (1) is provided with a groove corresponding to the connecting pipe (1601) to facilitate the movement of the connecting pipe (1601).

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