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CN-122007583-A - Low-carbon steel wet rivet bonding composite connecting device

CN122007583ACN 122007583 ACN122007583 ACN 122007583ACN-122007583-A

Abstract

The invention discloses a low-carbon steel wet rivet bonding composite connecting device and a using method thereof, and relates to the technical field of composite material and metal connection. The invention provides a resistance welding assembly, which is used for completing rivet bonding riveting points in composite connection, moving the riveting points to a welding station, and carrying out spot welding on the riveting points, wherein due to the arrangement of a riveting puncture hole, current flows from the rivet to the low carbon steel mother plate for spot welding, thus realizing metallurgical connection of the rivet and the low carbon steel mother plate, controlling the current, and ensuring that waste heat generated by welding cannot pyrolyze an adhesive between the carbon fiber composite plate mother plate and the low carbon steel mother plate, thereby achieving the effect of accelerating the curing of the adhesive.

Inventors

  • WANG NANNAN
  • QIU RANFENG
  • YANG YUFENG
  • ZHANG GONGWEI
  • YANG MING

Assignees

  • 中国民用航空飞行学院

Dates

Publication Date
20260512
Application Date
20260323

Claims (9)

  1. 1. The utility model provides a wet rivet bonding composite connection device of low carbon steel, includes frame (1), is equipped with panel processing platform on frame (1), and panel processing platform one side is equipped with hydraulic pressure towards riveting mechanism (2) that are used for panel composite connection, has placed carbon fiber composite board mother board (5) and low carbon steel mother board (6) on the panel processing platform, on carbon fiber composite board mother board (5), pre-open have riveting puncture hole, its characterized in that: The hydraulic riveting mechanism (2) comprises a first riveting component (21) and a second riveting component (22) which are respectively arranged on the upper side and the lower side of the carbon fiber composite board motherboard (5) and the lower side of the low carbon steel motherboard (6), and are used for opposite impact riveting of the carbon fiber composite board motherboard (5) and the lower carbon steel motherboard (6), a nail placing area is arranged at the bottom of the first riveting component (21), rivets (8) are arranged in the nail placing area, and a female die (223) is fixed at the upper end of the second riveting component (22); the lower groove of the rivet (8) is provided with a glue placing area (11) for placing an adhesive, and a plurality of glue discharging holes (81) are formed in the periphery of the rivet leg of the rivet (8); A deformation gap (9) is arranged between the upper end surface of the female die (223) and the lower end surface of the low-carbon steel mother plate (6); Rivet (8) rivet point and carbon fiber composite board mother board (5) establish the riveting puncture coaxial, push up pushing away low carbon steel mother board (6) to deformation clearance (9), concave deformation through pre-tapping, make carbon fiber composite board mother board (5), rivet point week side with low carbon steel mother board (6) forms and holds gluey region (10), its adhesive of inhaling in putting gluey region (11), second dashes and rivets subassembly (22) jacking die (223) extrusion and put gluey region (11) interior adhesive discharge, extrusion holds gluey region (10) simultaneously, make the adhesive tiling in riveting point week side, and opposite riveting, rivet (8), accomplish rivet bonding composite connection.
  2. 2. The wet rivet bonding composite joining apparatus of claim 1, further comprising a resistance welding assembly (4) for spot welding the rivet point where rivet bonding joining is completed, wherein welding current flows from the leg of the rivet (8) through the mild steel mother plate (6) to metallurgically join the leg of the rivet (8) to the mild steel mother plate (6), and resistance heat conduction is performed to the bonding area of the carbon fiber composite mother plate (5) and the mild steel mother plate (6) to accelerate adhesive curing.
  3. 3. The wet rivet bonding composite connection device of low-carbon steel according to claim 1, wherein the first punch-rivet assembly (21) comprises a sliding connection assembly (211) which is fixed on the linear module and used for driving the first punch-rivet assembly (21) to move up and down, a press head assembly (212) is fixed on the sliding connection assembly (211), and a punch (213) is assembled in the press head assembly (212).
  4. 4. The wet rivet bonding composite connecting device of low-carbon steel according to claim 3, wherein the second punch-rivet assembly (22) further comprises a hydraulic pushing assembly (222) for pushing up the female die (223), the hydraulic pushing assembly (222) is fixedly connected with a fixed connecting assembly (221), and the fixed connecting assembly (221) is fixed on the frame (1).
  5. 5. The wet rivet bonding composite connection device of low-carbon steel according to claim 1, wherein the rivet (8) further comprises a riveting washer (82) for riveting protection of the carbon fiber composite board mother board (5), and the riveting washer is arranged on the upper end face of the carbon fiber composite board mother board (5) and is coaxial with the riveting puncture hole pre-formed in the carbon fiber composite board mother board (5).
  6. 6. The wet rivet bonding composite connection device of low-carbon steel according to any one of claims 1 to 5, further comprising a plate limiting assembly (7), wherein the plate limiting assembly (7) is arranged on a plate processing table and is used for limiting movement of the carbon fiber composite plate mother plate (5) and the low-carbon steel mother plate (6), and a pressing plate mechanism (3) used for riveting and fixing the carbon fiber composite plate mother plate (5) and the low-carbon steel mother plate (6) is arranged above the plate limiting assembly (7).
  7. 7. The device of claim 6, wherein the plate limiting assembly (7) comprises a limiting baffle (71) fixed at one side of the upper end surface of the plate processing table and used for processing and positioning the plate, the other side of the plate processing table is provided with a movable baffle (72), the movable baffle (72) is used for sliding pushing and correcting the position of the plate, one end of the movable baffle is provided with a pushing cylinder (73), and the pushing cylinder (73) is fixedly connected with the frame (1) through a mounting frame.
  8. 8. The device for compositely connecting the low-carbon steel wet rivet bonding with the wet structure is characterized in that the pressing plate mechanism (3) comprises hinged supporting structures (34) fixed on two sides of the pushing cylinder (73), a connecting rod mechanism (32) is rotatably matched on the hinged supporting structures (34), one end, far away from the processing platform, of the connecting rod mechanism (32) is provided with the pressing plate cylinder (31), the pressing plate cylinder (31) is fixed on the mounting frame, the other end of the connecting rod mechanism (32) is connected with a pressing mechanism (33) through a waist hole, and the pressing mechanism (33) is used for compositely connecting and fixing the carbon fiber composite board mother board (5) with the low-carbon steel mother board (6) normally.
  9. 9. The device of claim 8, wherein the pressing mechanism (33) comprises a pressing plate hanging bracket (331) with one end hinged to the connecting rod mechanism (32), a sealing pad (334) is slidably matched with the central position of the pressing plate hanging bracket (331), the sealing pad (334) is used for sealing a pre-opened riveting puncture hole in the carbon fiber composite plate mother plate (5), a plurality of pressing plate wheels (332) are symmetrically arranged on the circumference of the pressing plate hanging bracket (331), and tension springs (333) are arranged between two adjacent pressing plate wheels (332) along the flow direction of the plate.

Description

Low-carbon steel wet rivet bonding composite connecting device Technical Field The invention relates to the technical field of connection of composite materials and metals, in particular to a low-carbon steel wet rivet bonding composite connection device. Background In recent years, as a main method for reducing the dead weight of an automobile, manufacturers utilize light materials to replace original steel materials in non-bearing structures, so that the safety of the automobile can be ensured, and meanwhile, the dead weight of the automobile is reduced. At present, light materials such as aluminum alloy, magnesium alloy, carbon fiber reinforced Composite (CFRP) and the like are commonly used for replacing the original steel. CFRP is a composite material formed by using carbon fibers as reinforcement and resin as matrix. The CFRP has high specific strength and can be used as a material of a light-weight high-strength vehicle body. The energy absorbed by CFRP is 4 times of that of common steel during impact, so that the safety of the automobile can be improved. Meanwhile, the CFRP has the characteristics of corrosion resistance, fatigue resistance, small cold and hot expansion coefficient and the like. Therefore, the research on the connection performance of CFRP and metal materials has very far-reaching significance. In the current CFRP and metal connection process, because the cementing is easy to be limited by the service environment, the mechanical connection and the joint are easy to fatigue and loose, and the strength of the welded joint is relatively low, so that the requirements of people cannot be met, the CFRP and the metal are often connected in a composite connection mode, and the performance of the joint is further improved. For example, the Chinese patent publication No. CN113134982B discloses a rivet bonding composite connection device between a pre-opened carbon fiber composite material and an aluminum alloy and a control method thereof, and the device comprises a female die, an aluminum alloy plate, a pre-opened hole formed in the center of the carbon fiber composite material plate, a blank holder arranged on the carbon fiber composite material plate and coaxially arranged with the pre-opened hole, an ultrasonic punch arranged in the blank holder and positioned at the upper part of the blank holder, a spherical shallow pit arranged at the bottom of the ultrasonic punch, a rivet arranged in the blank holder and coaxially arranged in the pre-opened hole, a pore canal mechanism axially formed along the rivet, a plurality of through holes radially formed at the lower part of the rivet, a nail plug matched and arranged in the rivet, and an upward concave curved surface arranged at the bottom of the nail plug. The invention can reduce the damage to the carbon fiber composite material plate in the riveting process and solve the problems of infirm bonding, glue overflow, partial glue shortage and the like of material layers in the bonding process. According to the scheme, CFRP and aluminum alloy are connected in a pre-opening Kong Jiaomao composite connection mode, glue injection and riveting are carried out in a nail head extrusion neck mode, after riveting, the glue is filled between the nail head and the alloy material, and deformation areas generated by extrusion of rivet legs on the alloy material are formed by the glue. Disclosure of Invention The invention aims to solve the problems and provide a low-carbon steel wet rivet bonding composite connecting device The invention realizes the above purpose through the following technical scheme: The wet rivet bonding composite connecting device of the low-carbon steel comprises a frame, wherein a plate processing table is arranged on the frame, a hydraulic punching and riveting mechanism for compositely connecting the plates is arranged on one side of the plate processing table, a carbon fiber composite plate motherboard and a low-carbon steel motherboard are placed on the plate processing table, a riveting puncture hole is pre-formed in the carbon fiber composite plate motherboard, the hydraulic punching and riveting mechanism comprises a first punching and riveting assembly and a second punching and riveting assembly which are respectively arranged on the upper side and the lower side of the carbon fiber composite plate motherboard and the lower side of the low-carbon steel motherboard, the first punching and riveting assembly is used for opposite impact riveting of the carbon fiber composite plate motherboard and the low-carbon steel motherboard, a nail placing area is arranged at the bottom of the first punching and riveting assembly, rivets are arranged in the rivet placing area, and a female die is fixed at the upper end of the second punching and riveting assembly; the lower groove of the rivet is provided with a glue placing area for placing the adhesive, and a plurality of glue discharging holes are formed in the peripheral side of the riv