A three-composite rivet type electrical contact forming device and method based on cutting circle process

Abstract

The present invention discloses a three-composite rivet type electric contact forming device and method based on a ring cutting process, belonging to the field of electric contact forming production. A three-composite rivet type electric contact forming device based on a ring cutting process comprises a processing table, a mounting frame is fixedly connected to the top of the processing table, a hydraulic telescopic rod is fixedly connected to the top of the mounting frame, a pressing mold rod is arranged at the telescopic bottom end of the hydraulic telescopic rod, and also comprises a work station disk rotatably connected to the processing table, wherein a plurality of groups of lower mold assemblies are arranged at equal intervals on the top of the work station disk; the present invention realizes the opening and closing of two groups of molding molds through the fitting and separation between the arc ring and the piston push plate, completes the self-unloading after pressing and molding, and effectively improves the production efficiency; and utilizes the air pressure generated by the movement of the piston push plate, and blows the molded electric contacts from the air blowing holes on both sides while unloading, so that the electric contacts can be demolded smoothly, ensuring the demolding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of electric contact forming production, and in particular to a three-composite rivet type electric contact forming device and method based on a ring cutting process. Background Art

[0002] The three-composite rivet-type electrical contact is a specially designed electrical contact, usually made of three different materials, which aims to combine the advantages of each material to improve the key performance indicators of the contact, such as conductivity, wear resistance, welding resistance and corrosion resistance, so as to meet the high performance requirements in specific applications. The ring cutting process is one of the key steps in the production of electrical contact forming. The ring cutting process is to cut a circular cylindrical metal part from a sheet or strip, and then put the metal part into a mold for pressing to produce a rivet-type electrical contact of the corresponding shape.

[0003] At present, in the process of forming and pressing rivet-type electrical contacts, loading and unloading and opening and closing of molds are usually carried out continuously at a single station, and the operation and coordination of multiple stations cannot be realized, which reduces the production efficiency. In addition, in the process of pressing, the metal parts produced by the cutting ring process are not sufficiently shaped, and cracks are easily formed, which leads to the reduction of the quality of the final formed electrical contacts. Therefore, a three-composite rivet-type electrical contact forming device and method based on the cutting ring process are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the prior art cannot realize multi-station operation coordination, which reduces production efficiency, and the metal parts are not sufficiently shaped during pressing, which easily leads to cracks and reduces the quality of the final formed electrical contacts. A three-composite rivet type electrical contact forming device and method based on the cutting ring process is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A three-composite rivet-type electric contact forming device based on a ring cutting process comprises a processing table, a mounting frame is fixedly connected to the top of the processing table, a hydraulic telescopic rod is fixedly connected to the top of the mounting frame, a pressing mold rod is arranged at the telescopic bottom end of the hydraulic telescopic rod, and also comprises: a work station disk rotatably connected to the processing table, wherein a plurality of groups of lower mold assemblies are arranged at equal intervals on the top of the work station disk, and when the lower mold assembly is in a closed state, it is used to form a casting cavity required for electric contact forming; when the lower mold assembly is in an open state, it is used to unload the formed electric contact; a heating assembly, wherein the heating assembly is arranged on the mounting frame, and the heating assembly is used to heat the raw material of the electric contact to be pressed.

[0007] In order to improve the processing efficiency, preferably, a positioning ring is fixedly connected inside the processing table, the work station disc is slidably connected in the cavity formed by the top of the positioning ring and the inner cavity of the processing table, a driven gear ring is fixedly connected to the bottom of the work station disc, a servo motor is fixedly connected to the bottom of the inner cavity of the processing table, and a driving gear is fixedly connected to the output shaft end of the servo motor. The driving gear and the driven gear ring are meshingly connected, and the number of teeth of the driven gear ring is equal to three times the number of teeth of the driving gear.

[0008] In order to realize blanking and improve processing efficiency, preferably, the lower mold assembly is provided with three groups, the lower mold assembly includes a positioning plate, the positioning plate is fixed on the top of the work station disk, and a blanking groove is opened in the center of the positioning plate, four groups of spring telescopic rods are symmetrically fixed on both sides of the positioning plate, and a forming mold is fixedly connected between the ends of two groups of spring telescopic rods parallel to each other, and a forming mold is opened on the forming mold. The forming mold forms a forming mold groove, and the forming mold grooves on both sides are close to each other and fit together to form a sealed electric contact pressing cavity, and a piston box is fixedly connected to the bottom of the work station disk below the positioning plate, and a piston push plate is slidably connected in the piston box. A first spring is fixedly connected between the top of the piston push plate and the inner wall of the piston box, and both sides of the top of the piston box are fixed and connected with a first conduit, and the top of the first conduit is connected to the piston cavity of the spring telescopic rod, and the two groups of spring telescopic rod piston cavities perpendicular to each other are connected through a second conduit, and an arc ring is fixedly connected to the bottom of the inner cavity of the processing table, and a discharge hopper is fixedly connected in the processing table, and the inlet end of the discharge hopper fits and slides with the bottom of the work station disk.

[0009] Furthermore, the side of the arc ring close to the discharge hopper is open, and the length of the opening is greater than the length of the piston push plate. The tops of both ends of the arc ring and the bottom sides of the piston push plate are both arc-shaped rounded corners, and the bottom of the piston push plate slides on the top of the arc ring.

[0010] In order to avoid blockage of material discharge, preferably, a linkage groove is provided on the top of the arc ring, a friction roller is rotatably connected in the linkage groove, an induced draft box is fixedly connected to the bottom of the inner cavity of the processing table, the rotating shaft of the friction roller passes through the induced draft box and is fixedly connected to an air guide blade, an air guide box is connected to the bottom of the inner cavity of the processing table, the bottom of the discharge hopper is located directly below the material discharge chute and is fixedly connected to a back blowing box, a plurality of groups of back blowing holes are provided between the top of the back blowing box and the inner cavity of the discharge hopper, one end of the air guide box is connected to the inner cavity of the induced draft box, and the other end of the air guide box is connected to the inner cavity of the back blowing box.

[0011] In order to ensure the mold closing effect, positioning blocks are fixedly connected on both sides of the middle of the positioning plate, and positioning grooves are opened on the side of the molding mold close to the positioning blocks on both sides. The inner diameter of the cavity after the positioning grooves on both sides are fitted is equal to the outer diameter of the positioning block.

[0012] In order to achieve smooth material discharge, preferably, air blowing grooves are opened in the forming molds on both sides, an air blowing pipe is fixedly connected to the positioning plate, both ends of the air blowing pipe are respectively connected to the inner cavities of the air blowing grooves on both sides, and an air blowing hole is opened on the side of the air blowing groove close to the forming mold groove, and the bottom of the side wall of the piston box is fixed and connected with a third conduit, and the other end of the third conduit is connected to the inner cavity of the air blowing pipe.

[0013] In order to improve the quality of press molding, preferably, an inert gas box and a heater are fixedly connected to the mounting frame respectively, the output end of the heater is connected to the inner cavity of the inert gas box, a sealing cylinder is fixedly connected to the outer wall of the pressing mold rod, a sealing cover is slidably connected in the sealing cylinder, the inner wall of the sealing cover is fitted with the outer wall of the pressing mold rod, a second spring is fixedly connected between the top of the sealing cover and the top of the sealing cylinder, the bottom of the side wall of the sealing cylinder is fixed and connected with a heat conducting pipe, the other end of the heat conducting pipe is connected to the inner cavity of the inert gas box, an air conducting hole is opened on the upper part of the side wall of the sealing cover, and when the second spring is in a natural state, the sealing cover is in a position to block the port of the heat conducting pipe.

[0014] In order to improve the protection of falling materials, preferably, a blowing trough is provided in the discharge hopper, and a plurality of groups of blowing holes are provided at equal intervals on the side wall of the blowing trough, and the blowing holes are facing the bottom of the inner cavity of the discharge hopper. The end of the blowing trough is fixed and connected with a blowing pipe, and the other end of the blowing pipe is connected to the top of the inner cavity of the sealing tube.

[0015] A method for forming a three-composite rivet-type electrical contact based on a cutting ring process, the steps are as follows:

[0016] Step 1: Fixing the columnar raw material for pressing;

[0017] Step 2: heating the fixed columnar raw material;

[0018] Step 3: Pressing and molding the columnar raw material;

[0019] Step 4: Unloading the pressed rivet-type electrical contacts.

[0020] Compared with the prior art, the present invention provides a three-composite rivet type electrical contact forming device and method based on the cutting ring process, which has the following beneficial effects:

[0021] 1. The three-composite rivet-type electric contact forming device based on the cutting ring process realizes the opening and closing of the two sets of forming molds through the fitting and separation between the arc ring and the piston push plate, completes the self-unloading after pressing and forming, and effectively improves the production efficiency; and utilizes the air pressure generated by the movement of the piston push plate. At the same time of unloading, the formed electric contacts are blown from the air blowing holes on both sides so that the electric contacts can be demolded smoothly, ensuring the demolding effect.

[0022] 2. The three-composite rivet-type electric contact forming device based on the cutting ring process, through the setting of the sealing cover, after it is fitted with the surface of the mold, the blocked port of the heat pipe is opened. At this time, the heated inert gas will enter the sealing cover to preheat the metal column, thereby improving the plasticity and ductility of the metal column, reducing processing stress, reducing the situation of pressing cracking, and improving the forming quality of the electric contact; and it can generate airflow along the blowing hole to blow to the bottom of the inner cavity of the discharge hopper to push the falling electric contact to be discharged quickly, thereby improving the unloading efficiency.

[0023] 3. The three-composite rivet-type electric contact forming device based on the cutting circle process, through the friction between the piston push plate and the friction roller, makes the air guide blades produce a directional guide effect in the air induced box, and discharges the airflow in the processing table upward from the backblowing hole. At this time, an upward airflow lifting effect is produced on the falling electric contact, which effectively reduces the falling impact of the electric contact, improves the falling protection of the electric contact, and ensures the final quality of the electric contact; at the same time, it can dissipate the heat generated by friction and servo motor in the processing table, thereby improving the protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of a three-composite rivet-type electrical contact forming device based on the cutting ring process proposed by the present invention is schematically shown. Figure 1 ;

[0025] Figure 2 The overall structure of a three-composite rivet-type electrical contact forming device based on the cutting ring process proposed by the present invention is schematically shown. Figure 2 ;

[0026] Figure 3 It is a partial cross-sectional structural schematic diagram of a three-composite rivet-type electric contact forming device based on a cutting ring process proposed by the present invention;

[0027] Figure 4 The invention proposes a three-composite rivet type electric contact forming device based on the cutting circle process. Figure 3 A schematic diagram of the enlarged structure of the middle A area;

[0028] Figure 5 This is a schematic diagram of the internal structure of a processing table of a three-composite rivet-type electric contact forming device based on a cutting ring process proposed by the present invention;

[0029] Figure 6 A schematic diagram of a half-section structure of a three-composite rivet-type electric contact forming device based on a cutting ring process proposed by the present invention;

[0030] Figure 7 The invention proposes a three-composite rivet type electric contact forming device based on the cutting circle process. Figure 6 Schematic diagram of the enlarged structure of the middle B area;

[0031] Figure 8 A schematic diagram of the internal cross-sectional structure of a sealing cylinder of a three-composite rivet-type electric contact forming device based on a cutting ring process proposed by the present invention;

[0032] Fig. 9 This is a schematic diagram of the connection structure between the driven gear ring and the driving gear of a three-composite rivet-type electric contact forming device based on the ring cutting process proposed by the present invention.

[0033] In the figure: 1, processing table; 2, mounting frame; 21, hydraulic telescopic rod; 22, pressing die rod; 3, work station plate; 31, positioning ring; 32, driven gear ring; 33, servo motor; 34, driving gear; 4, positioning plate; 41, spring telescopic rod; 411, second guide tube; 42, forming die; 421, forming die groove; 43, piston box; 431, piston push plate; 432, first spring; 433, first guide tube; 44, arc ring; 45, discharge hopper; 46, blanking chute; 47. Positioning block; 471. Positioning groove; 5. Air blowing groove; 51. Air blowing pipe; 52. Third conduit; 53. Air blowing hole; 6. Inert gas box; 61. Heater; 62. Sealing cylinder; 63. Sealing cover; 631. Second spring; 632. Air guide hole; 64. Heat conducting pipe; 7. Linkage groove; 71. Friction roller; 72. Air induced box; 73. Air guide blade; 74. Air guide box; 75. Back blowing box; 751. Back blowing hole; 8. Blowing groove; 81. Blowing hole; 82. Blowing pipe. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0036] Reference Figure 1-Figure 9A three-composite rivet-type electric contact forming device based on a ring cutting process includes a processing table 1, a mounting frame 2 is fixedly connected to the top of the processing table 1, a hydraulic telescopic rod 21 is fixedly connected to the top of the mounting frame 2, and a pressing mold rod 22 is arranged at the telescopic bottom end of the hydraulic telescopic rod 21. It also includes: a work station disk 3 rotatably connected to the processing table 1, wherein a plurality of groups of lower mold assemblies are arranged at equal intervals on the top of the work station disk 3, and when the lower mold assembly is in a closed state, it is used to form a casting cavity required for electric contact molding; when the lower mold assembly is in an open state, it is used to unload the formed electric contact; a heating assembly, the heating assembly is arranged on the mounting frame 2, and the heating assembly is used to heat the electric contact raw material to be pressed.

[0037] Reference Figure 1-Figure 3 , Figure 5 , Figure 6 and Fig. 9 , wherein a positioning ring 31 is fixedly connected inside the processing table 1, and the work station disc 3 is slidably connected in the cavity formed by the top of the positioning ring 31 and the inner cavity of the processing table 1, and a driven gear ring 32 is fixedly connected to the bottom of the work station disc 3, and a servo motor 33 is fixedly connected to the bottom of the inner cavity of the processing table 1, and a driving gear 34 is fixedly connected to the output shaft end of the servo motor 33, and the driving gear 34 is meshed with the driven gear ring 32, and the number of teeth of the driven gear ring 32 is equal to three times the number of teeth of the driving gear 34; the lower mold assembly is provided with three groups, and the lower mold assembly includes a positioning plate 4, the positioning plate 4 is fixed on the top of the work station disc 3, and a blanking groove 46 is opened in the center of the positioning plate 4, four groups of spring telescopic rods 41 are symmetrically fixed on both sides of the positioning plate 4, and a forming mold 42 is fixedly connected between the ends of the two groups of spring telescopic rods 41 parallel to each other, and a forming mold 42 is opened on the forming mold 42, and the forming mold grooves 421 on both sides are close to each other and fit together to form a sealed electric contact pressing cavity, located A piston box 43 is fixedly connected to the bottom of the work station disk 3 below the positioning plate 4, and a piston push plate 431 is slidably connected in the piston box 43. A first spring 432 is fixedly connected between the top of the piston push plate 431 and the inner wall of the piston box 43. Both sides of the top of the piston box 43 are fixed and connected with a first conduit 433. The top of the first conduit 433 is connected to the piston cavity of the spring telescopic rod 41, and the piston cavities of the two sets of spring telescopic rods 41 perpendicular to each other are connected through a second conduit 411. An arc ring 44 is fixedly connected to the bottom of the inner cavity of the processing table 1. The side of the arc ring 44 close to the discharge hopper 45 is open, and the length of the opening is greater than the length of the piston push plate 431. The tops of the two ends of the arc ring 44 and the two sides of the bottom of the piston push plate 431 are all arc-shaped fillets. The bottom of the piston push plate 431 fits on the top of the arc ring 44 and slides. A discharge hopper 45 is fixedly connected to the processing table 1, and the inlet end of the discharge hopper 45 fits and slides with the bottom of the work station disk 3.

[0038] It should be noted that the three groups of positioning plates 4 represent three workstations respectively. The one located at the bottom of the pressing mold rod 22 is the pressing station, the one located at the discharge hopper 45 is the unloading station, and the other is the loading station, and the loading station can be equipped with manual or existing robotic arms for loading; and because the number of teeth on the driven gear ring 32 is equal to three times the number of teeth on the driving gear 34, therefore, when the shaft of the servo motor 33 rotates one circle, a rotation will occur between the above-mentioned workstations.

[0039] Through the arrangement of the above structure, firstly, the circular metal column punched out by the circle cutting process is placed into the forming die groove 421 at the loading station manually or by a robotic arm, and then the servo motor 33 drives the driving gear 34 to rotate one circle, so that the station plate 3 rotates one-third of a circle, at which time the forming die groove 421 with the circular metal column will move to the pressing station under the pressing die rod 22, and then the hydraulic telescopic rod 21 pushes the pressing die rod 22 to move slowly downward, exerting vertical pressure on the metal column to form the required electrical contact; and after pressing and forming, the servo motor 33 drives the station plate 3 to rotate one-third of a circle again, and at this time the new forming die groove 421 with the metal column will continue to move to the bottom of the pressing die rod 22, and the pressed electrical contact It will move to the unloading station, and at this time, the piston push plate 431 will move to the open part of the arc ring 44. Under the rebound action of the first spring 432, the piston push plate 431 will move downward, releasing the compression effect on the gas in the top cavity of the piston box 43, so that the gas filled into the spring telescopic rod 41 along the first conduit 433 flows back into the piston box 43. At this time, the air pressure in the spring telescopic rod 41 is reduced, and under the action of its internal spring, the spring telescopic rod 41 will retract, thereby pulling the two side molding dies 42 to move toward the side of the mold opening, so that the molded electrical contacts are separated from the molding die groove 421 and fall into the unloading hopper 45 along the blanking groove 46 and are discharged by themselves, thereby unloading by themselves during the station conversion, effectively improving the production efficiency.

[0040] Reference Figure 3 , Figure 6 and Figure 7 Among them, a linkage groove 7 is opened at the top of the arc ring 44, and a friction roller 71 is rotatably connected in the linkage groove 7. An air induced draft box 72 is fixedly connected to the bottom of the inner cavity of the processing table 1. The rotating shaft of the friction roller 71 passes through the air induced draft box 72 and is fixedly connected to an air guide blade 73. An air guide box 74 is connected to the bottom of the inner cavity of the processing table 1. The bottom of the discharge hopper 45 is located directly below the blanking chute 46 and is fixedly connected to a back-blowing box 75. A plurality of back-blowing holes 751 are opened between the top of the back-blowing box 75 and the inner cavity of the discharge hopper 45. One end of the air guide box 74 is connected to the inner cavity of the air induced draft box 72, and the other end of the air guide box 74 is connected to the inner cavity of the back-blowing box 75.

[0041] Through the arrangement of the above-mentioned structure, in the process of the piston push plate 431 rotating along the top of the arc ring 44, the friction effect will drive the friction roller 71 to rotate, thereby driving the air guide blades 73 in the air induced box 72 to rotate, thereby generating a directional air flow guide effect in the air induced box 72, so that the airflow in the inner cavity of the processing table 1 enters the air induced box 72, and then enters the back-blowing box 75 along the air guide box 74, and is finally discharged upward from the back-blowing hole 751. At this time, an upward airflow lifting effect is generated on the falling electric contacts, which effectively reduces the falling impact of the electric contacts, improves the falling protection of the electric contacts, and ensures the final quality of the electric contacts; at the same time, it can dissipate the heat generated by friction and the servo motor 33 in the processing table 1, thereby improving the protection effect.

[0042] Reference Figure 1 , Figure 2 Among them, positioning blocks 47 are fixedly connected to both sides of the middle of the positioning plate 4, and positioning grooves 471 are opened on the side of the molding molds 42 on both sides close to the positioning blocks 47. The inner diameter of the cavity after the positioning grooves 471 on both sides are fitted is equal to the outer diameter of the positioning blocks 47; by using the setting of the positioning blocks 47 and the positioning grooves 471, the molding molds 42 on both sides can be tightly fitted in the middle of the positioning plate 4, ensuring the mold closing pressing and mold opening blanking effects.

[0043] Reference Figure 3 , Figure 4 and Figure 8 Among them, air blowing grooves 5 are opened in the molding molds 42 on both sides, and an air blowing pipe 51 is fixedly connected to the positioning plate 4. The two ends of the air blowing pipe 51 are respectively connected to the inner cavities of the air blowing grooves 5 on both sides, and an air blowing hole 53 is opened on the side of the air blowing groove 5 close to the molding mold groove 421. The bottom of the side wall of the piston box 43 is fixed and connected with a third conduit 52, and the other end of the third conduit 52 is connected to the inner cavity of the air blowing pipe 51.

[0044] Through the arrangement of the above structure, when the piston push plate 431 moves downward, the airflow in the bottom cavity of the piston box 43 will also be compressed, and this part of the airflow will enter the air blowing groove 5 along the third conduit 52, and finally blown out from the air blowing holes 53 on both sides, so that the formed electrical contacts are separated from the forming mold groove 421, so as to complete the self-demolition, which effectively improves the processing efficiency.

[0045] Reference Figure 1 , Figure 6 and Figure 8, wherein the mounting frame 2 is respectively fixedly connected with an inert gas box 6 and a heater 61, the output end of the heater 61 is connected with the inner cavity of the inert gas box 6, a sealing cylinder 62 is fixedly connected with the outer wall of the pressing mold rod 22, a sealing cover 63 is slidably connected in the sealing cylinder 62, the inner wall of the sealing cover 63 is in contact with the outer wall of the pressing mold rod 22, a second spring 631 is fixedly connected between the top of the sealing cover 63 and the inner top of the sealing cylinder 62, the bottom of the side wall of the sealing cylinder 62 is fixed and connected with a heat conducting pipe 64, the other end of the heat conducting pipe 64 is connected with the inner cavity of the inert gas box 6, an air conducting hole 632 is opened on the upper part of the side wall of the sealing cover 63, and when the second spring 631 is in a natural state, the sealing cover 63 is in a position to block the end of the heat conducting pipe 64.

[0046] Through the arrangement of the above structure, when the hydraulic telescopic rod 21 pushes the pressing mold rod 22 to move slowly downward, the sealing cover 63 will first fit to the surface of the forming mold 42 to form a sealed heating cavity, and then when the sealing cover 63 slides upward under the downward pressure, its top side wall will release the blockage of the port of the heat pipe 64, and at this time, the heated airflow in the inert gas box 6 will enter the sealing tube 62 along the heat pipe 64, and then enter the sealed heating cavity through the air guide hole 632, so as to preheat the circular metal column, thereby improving the plasticity and ductility of the metal column, reducing processing stress, reducing the situation of pressing cracking, and improving the forming quality of the electrical contact; and under the rebound action of the second spring 631, the sealing cover 63 will also extend downward, and when the sealing cover 63 is separated from the surface of the forming mold 42, its top will re-block the port of the heat pipe 64, thereby reducing heat dissipation and improving energy saving effect.

[0047] Reference Figure 1 , Figure 6 and Figure 8 A blowing groove 8 is provided in the discharge hopper 45, and a plurality of blowing holes 81 are provided at equal intervals on the side wall of the blowing groove 8, and the blowing holes 81 face the bottom of the inner cavity of the discharge hopper 45. The end of the blowing groove 8 is fixed and connected with a blowing pipe 82, and the other end of the blowing pipe 82 is connected to the top of the inner cavity of the sealing tube 62.

[0048] It should be noted that the blowing tube 82 adopts a telescopic sleeve to cooperate with the overall lifting and lowering of the sealing tube 62.

[0049] Through the arrangement of the above structure, when the sealing cover 63 is pushed upward, the gas in the sealing tube 62 will be compressed, and this part of the compressed gas will enter the blowing groove 8 along the blowing tube 82, and finally blow to the bottom of the inner cavity of the discharge hopper 45 through the blowing hole 81, thereby pushing the formed electric contacts to fall quickly, improving the blanking efficiency, and avoiding the accumulation of the blanked electric contacts, thereby ensuring the unloading effect. Example

[0050] Reference Figure 1-Figure 9 , which is basically the same as the first embodiment, on the basis of the first embodiment, a three-composite rivet type electrical contact forming method based on the cutting circle process is proposed, characterized in that the steps are as follows:

[0051] Step 1: Fixing the columnar raw material for pressing;

[0052] Step 2: heating the fixed columnar raw material;

[0053] Step 3: Pressing and molding the columnar raw material;

[0054] Step 4: Unloading the pressed rivet-type electrical contacts.

[0055] Reference Figure 1-Figure 9 In the present invention, when in use, firstly, the circular metal column punched out by the circle cutting process is placed into the forming die groove 421 at the loading station by manual or mechanical arm, and then the servo motor 33 drives the driving gear 34 to rotate one circle, so that the station plate 3 rotates one-third of a circle, and then the forming die groove 421 with the circular metal column will move to the pressing station below the pressing die rod 22, and then the hydraulic telescopic rod 21 pushes the pressing die rod 22 to move down slowly, and at this time the sealing cover 63 will first fit to the surface of the forming mold 42 to form a sealed heating cavity, and then when the sealing cover 63 slides upward under the downward pressure, its top side wall will release the blockage of the port of the heat pipe 64, and at this time the inert gas box 6 is heated. The airflow will enter the sealing tube 62 along the heat pipe 64, and then enter the sealed heating cavity through the air guide hole 632, so as to preheat the circular metal column, thereby improving the plasticity and ductility of the metal column, reducing processing stress, reducing the situation of pressing cracking, and improving the forming quality of the electric contact; then the pressing mold rod 22 continues to move downward, exerting vertical pressure on the heated metal column to form the required electric contact, and then the pressing mold rod 22 moves up and resets. Under the rebound action of the second spring 631, the sealing cover 63 will also extend downward. When the sealing cover 63 is separated from the surface of the forming mold 42, its top will re-seal the port of the heat pipe 64, so as to reduce heat dissipation and improve energy saving effect.

[0056] After the pressing and forming, the servo motor 33 drives the station disk 3 to rotate one-third of a circle again. At this time, the new forming die groove 421 with the metal column will continue to move to the bottom of the pressing die rod 22, and the pressed electric contact will move to the unloading station. At this time, the piston push plate 431 will move to the open mouth of the arc ring 44. Under the rebound action of the first spring 432, the piston push plate 431 will move downward, releasing the compression effect on the gas in the top cavity of the piston box 43, so that the gas filled into the spring telescopic rod 41 along the first conduit 433 flows back into the piston box 43. At this time, the air pressure in the spring telescopic rod 41 is reduced. Under the action of its internal spring, the spring telescopic rod 41 will retract, thereby pulling the molding molds 42 on both sides to move toward the side of the mold opening, and the piston push plate 43 When the piston box 43 moves downward, the airflow in the cavity at the bottom of the piston box 43 will be compressed, and this part of the airflow will enter the air blowing groove 5 along the third guide tube 52, and finally blown out from the air blowing holes 53 on both sides, so that the formed electric contact is separated from the forming die groove 421, and falls into the discharge hopper 45 along the blanking groove 46 and discharged by itself, so that it can be discharged by itself during the station conversion, which effectively improves the production efficiency; and after the unloading is completed, the station plate 3 rotates one-third of a circle again, at this time, the piston push plate 431 will be re-attached to the top of the arc ring 44, and under the extrusion effect, the piston push plate 431 will retract into the piston box 43, so that the gas is filled into the spring telescopic rod 41 again, pushing its telescopic end to extend, and forming a sealed pressing cavity again, and so on. The cycle effectively improves the processing efficiency.

[0057] When the sealing cover 63 is pushed upward, the gas in the sealing tube 62 will be compressed, and this part of the compressed gas will enter the blowing groove 8 along the blowing pipe 82, and finally blow to the bottom of the inner cavity of the discharge hopper 45 through the blowing hole 81, so as to push the formed electric contact to fall quickly, improve the material dropping efficiency, and avoid the accumulation of the electric contact dropping, so as to ensure the unloading effect. In addition, in the process of the piston push plate 431 rotating along the top of the arc ring 44, the friction effect will drive the friction roller 71 to rotate, thereby driving the air guide blade 73 in the air induced box 72 to rotate, so as to produce a directional flow guide effect in the air induced box 72, so that the airflow in the inner cavity of the processing table 1 enters the air induced box 72, and then enters the back-blowing box 75 along the air guide box 74, and finally is discharged upward from the back-blowing hole 751, at this time, the upward airflow lifting effect is produced on the falling electric contact, which effectively reduces the falling impact of the electric contact, improves the protection of the electric contact from dropping, and ensures the final quality of the electric contact.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A three-composite rivet-type electrical contact forming device based on a cutting ring process, comprising a processing table (1), characterized in that: The processing table (1) is fixedly connected to a mounting frame (2) at the top, the mounting frame (2) is fixedly connected to a hydraulic telescopic rod (21) at the top, and a pressing die rod (22) is provided at the telescopic bottom end of the hydraulic telescopic rod (21), and further comprises: Rotate the work station disk (3) connected to the processing table (1), Wherein, a plurality of groups of lower die assemblies are arranged at equal intervals on the top of the work station plate (3); when the lower die assemblies are in a closed state, they are used to form a casting cavity required for forming the electric contact; and when the lower die assemblies are in an open state, they are used to unload the formed electric contacts; A heating component, the heating component is arranged on the mounting frame (2), and the heating component is used to heat the electrical contact raw material to be pressed; The lower die assembly is provided with three groups, and the lower die assembly comprises a positioning plate (4), the positioning plate (4) is fixed on the top of the work station disk (3), and a blanking groove (46) is provided in the center of the positioning plate (4), four groups of spring telescopic rods (41) are symmetrically fixed on both sides of the positioning plate (4), and a forming mold (42) is fixedly connected between the ends of two groups of spring telescopic rods (41) which are parallel to each other, and a forming mold groove (421) is provided on the forming mold (42), and the forming mold grooves (421) on both sides are close to each other and fit together to form a sealed electric contact pressing cavity, and a piston box (43) is fixedly connected to the bottom of the work station disk (3) below the positioning plate (4), and the piston box (43) A piston push plate (431) is slidably connected inside, a first spring (432) is fixedly connected between the top of the piston push plate (431) and the inner wall of the piston box (43), first conduits (433) are fixedly connected and communicated with each other on both sides of the top of the piston box (43), the top of the first conduit (433) is connected to the piston cavity of the spring telescopic rod (41), and the two groups of piston cavities of the spring telescopic rod (41) perpendicular to each other are connected through a second conduit (411), an arc ring (44) is fixedly connected to the bottom of the inner cavity of the processing table (1), and a discharge hopper (45) is fixedly connected inside the processing table (1), and the inlet end of the discharge hopper (45) is slidably fitted with the bottom of the work station plate (3).

2. A three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 1, characterized in that: A positioning ring (31) is fixedly connected inside the processing table (1); the work station disc (3) is slidably connected in a cavity formed by the top of the positioning ring (31) and the inner cavity of the processing table (1); a driven gear ring (32) is fixedly connected to the bottom of the processing table (3); a servo motor (33) is fixedly connected to the bottom of the inner cavity of the processing table (1); a driving gear (34) is fixedly connected to the output shaft end of the servo motor (33); the driving gear (34) is meshingly connected to the driven gear ring (32); and the number of teeth of the driven gear ring (32) is equal to three times the number of teeth of the driving gear (34).

3. The three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 1 is characterized in that: The arc ring (44) is open on one side close to the discharge hopper (45), and the length of the opening is greater than the length of the piston push plate (431). The tops of both ends of the arc ring (44) and the bottom sides of the piston push plate (431) are both arc-shaped with rounded corners, and the bottom of the piston push plate (431) slides on the top of the arc ring (44).

4. The three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 1 is characterized in that: A linkage groove (7) is provided at the top of the arc ring (44), and a friction roller (71) is rotatably connected in the linkage groove (7). An air induced draft box (72) is fixedly connected to the bottom of the inner cavity of the processing table (1). The rotating shaft of the friction roller (71) passes through the inner cavity of the air induced draft box (72) and is fixedly connected to an air guide blade (73). An air guide box (74) is connected to the bottom of the inner cavity of the processing table (1). A back-blowing box (75) is fixedly connected to the bottom of the discharge hopper (45) directly below the material drop chute (46). A plurality of back-blowing holes (751) are provided between the top of the back-blowing box (75) and the inner cavity of the discharge hopper (45). One end of the air guide box (74) is connected to the inner cavity of the air induced draft box (72), and the other end of the air guide box (74) is connected to the inner cavity of the back-blowing box (75).

5. The three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 1 is characterized in that: Positioning blocks (47) are fixedly connected to both sides of the middle of the positioning plate (4), and positioning grooves (471) are provided on both sides of the molding dies (42) close to the positioning blocks (47). The inner diameter of the cavity after the positioning grooves (471) on both sides are fitted is equal to the outer diameter of the positioning blocks (47).

6. The three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 1 is characterized in that: Air blowing grooves (5) are provided in the molding dies (42) on both sides, an air blowing pipe (51) is fixedly connected in the positioning plate (4), two ends of the air blowing pipe (51) are respectively connected to the inner cavities of the air blowing grooves (5) on both sides, and an air blowing hole (53) is provided on one side of the air blowing groove (5) close to the molding die groove (421), and a third conduit (52) is fixed and connected to the bottom of the side wall of the piston box (43), and the other end of the third conduit (52) is connected to the inner cavity of the air blowing pipe (51).

7. The three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 1 is characterized in that: An inert gas box (6) and a heater (61) are fixedly connected to the mounting frame (2), respectively; the output end of the heater (61) is connected to the inner cavity of the inert gas box (6); a sealing cylinder (62) is fixedly connected to the outer wall of the pressing die rod (22); a sealing cover (63) is slidably connected inside the sealing cylinder (62); the inner wall of the sealing cover (63) is in contact with the outer wall of the pressing die rod (22); a second spring (631) is fixedly connected between the top of the sealing cover (63) and the inner top of the sealing cylinder (62); a heat conducting pipe (64) is fixedly connected to the bottom of the side wall of the sealing cylinder (62) and is connected to the other end of the heat conducting pipe (64) and is connected to the inner cavity of the inert gas box (6); an air conducting hole (632) is provided on the upper part of the side wall of the sealing cover (63); and when the second spring (631) is in a natural state, the sealing cover (63) is in a position to block the end of the heat conducting pipe (64).

8. The three-composite rivet type electrical contact forming device based on the cutting circle process according to claim 7 is characterized in that: A blowing groove (8) is provided in the discharge hopper (45), and a plurality of blowing holes (81) are provided on the side wall of the blowing groove (8) at equal intervals, and the blowing holes (81) face the bottom of the inner cavity of the discharge hopper (45). The end of the blowing groove (8) is fixed and connected to a blowing pipe (82), and the other end of the blowing pipe (82) is connected to the top of the inner cavity of the sealing tube (62).

9. A method for forming a three-composite rivet-type electrical contact based on a cutting process, using a three-composite rivet-type electrical contact forming device based on a cutting process as claimed in any one of claims 1 to 8, characterized in that: Here are the steps: Step 1: Fixing the columnar raw material for pressing; Step 2: heating the fixed columnar raw material; Step 3: Pressing and molding the columnar raw material; Step 4: Unloading the pressed rivet-type electrical contacts.

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