Semi-hollow butt joint rivet and riveting method thereof

Abstract

The invention relates to a semi-hollow butt joint rivet and a riveting method thereof, and belongs to the technical field of mechanical connection. The rivet is composed of a rivet body, a partition plate is arranged on the rivet body, and supporting pieces are respectively installed in the rivet body above and below the partition plate in an interference mode. The rivet is simple in structure, the rivet upper cavity and the rivet lower cavity can be supported through the supporting piece, the rivet can be effectively reinforced through the supporting piece, the rivet is prevented from collapsing inwards or being bent laterally in the process of penetrating into a plate, it can be effectively guaranteed that the rivet penetrates into the plate and penetrates into the accurate position, and therefore it is guaranteed that the rivet is accurately positioned and plates are reliably connected; and the connection stability is effectively ensured. The problems that an existing semi-hollow rivet is inaccurate in positioning in the plate connecting process, and effective connection between plates cannot be achieved due to bending deformation of rivet legs are solved.

Description

Technical Field

[0001] The invention relates to a semi-hollow butt rivet and a riveting method thereof, belonging to the technical field of mechanical connection. Background Art

[0002] With the rapid development of the global economy, energy and environmental issues have become increasingly prominent. Lightweight materials (aluminum alloys, magnesium alloys, composite materials, etc.) have ushered in rapid development and are widely used in the fields of automobiles, aerospace, ships, home appliances, etc. However, the connection problem between these lightweight materials has become a new challenge. Traditional methods such as 1. Traditional spot welding is difficult to achieve effective connection due to the different physical and chemical properties between dissimilar materials. 2. Bolt connection, although it can achieve effective connection between dissimilar materials, requires opening holes in advance, and the process is relatively cumbersome. 3. The adhesive bonding method is relatively simple, but the adhesive bonding curing time is long, and surface treatment is required. In addition, the joints are easily aged due to environmental influences and are not stable enough.

[0003] Self-piercing riveting is a mechanical cold connection technology for connecting two or more layers of materials (thin plates). It forms an effective mechanical interlocking structure through plastic deformation between rivets and materials, which can effectively achieve the connection between dissimilar or homogeneous materials. The self-piercing riveting process has the following main advantages: fast connection, no need for punching, easy automation, and convenient equipment monitoring. However, when connecting plates, the self-piercing riveting process will produce bulges on the outer surface of the interlocking structure, which affects the surface quality of the connecting parts, thereby limiting its further application. In addition, when connecting thicker and higher-strength plates (such as 2cm thick ultra-high-strength steel), the existing semi-hollow rivets are due to structural and strength reasons; there are situations where the positioning (the amount of penetration of the upper and lower plates) is inaccurate during connection and the rivet legs are bent and deformed, resulting in the inability to achieve effective connection between the plates; therefore, it is necessary to improve it. Summary of the invention

[0004] The purpose of the present invention is to provide a semi-hollow butt rivet and a riveting method thereof which has a simple structure, good stability, effectively improves the mechanical internal locking strength, and solves the problems of inaccurate positioning of existing semi-hollow rivets during the plate connection process and inability to achieve effective connection between plates due to bending and deformation of rivet legs.

[0005] The technical solution of the present invention is: A semi-hollow butt rivet, which consists of a rivet body, characterized in that: the rivet body is in a hollow cylindrical shape, a partition is provided in the middle part of the rivet body, an upper rivet cavity and a lower rivet cavity formed by the partition are provided above and below the partition, and support members are respectively installed in the upper rivet cavity and the lower rivet cavity in an interference fit manner to provide compressive strength to the rivet body legs corresponding to the support members to prevent the rivet body legs from being bent and deformed under pressure.

[0006] An annular boss is arranged on the outer circumference of the rivet body corresponding to the partition.

[0007] The support piece is cup-shaped, and the port of the support piece and the upper and lower ports of the rivet body are respectively inverted at 30-60 degrees.

[0008] A semi-hollow butt rivet, which consists of a rivet body and is characterized in that: the rivet body is in a hollow cylindrical shape, a partition is provided in the middle part of the rivet body, an upper rivet cavity and a lower rivet cavity formed by the partition are provided above and below the partition, support members are slidably installed in the upper rivet cavity and the lower rivet cavity respectively, a connecting rod is movably installed through a through hole in the center part of the partition, one end of the connecting rod is threadedly connected to the support member of the upper rivet cavity, and the other end of the connecting rod is fixedly connected to the support member of the lower rivet cavity, so as to provide compressive strength to the rivet body leg corresponding to the support member to avoid the rivet body leg from being compressed, bent and deformed.

[0009] An annular boss is arranged on the outer circumference of the rivet body corresponding to the partition.

[0010] The support piece is cup-shaped, and the port of the support piece and the upper and lower ports of the rivet body are respectively inverted at 30-60 degrees.

[0011] The beneficial effects of the present invention are: The semi-hollow butt rivet has a simple structure, and the upper cavity and the lower cavity of the rivet can be supported by the support member, and the rivet can be effectively strengthened by the support member to prevent the rivet from collapsing inward or bending laterally during the process of piercing the plate, and can effectively ensure that the rivet penetrates the plate and penetrates into the correct position, thereby ensuring that the rivet is accurately positioned and the connection between the plates is reliable, and the stability of the connection is effectively ensured. The existing semi-hollow rivet is not accurately positioned during the plate connection process, and the problem that the rivet leg is bent and deformed, resulting in the inability to achieve an effective connection between the plates, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the improved version of the present invention; Figure 3 It is a connection schematic diagram of the present invention; Figure 4 It is a connection diagram of the improved version of the present invention.

[0013] In the figure: 1, rivet body, 2, partition, 3, rivet upper cavity, 4, rivet lower cavity, 5, support member, 6, annular boss, 7, connecting rod. DETAILED DESCRIPTION Example 1

[0014] The semi-hollow butt rivet is composed of a rivet body 1, which is in a hollow cylindrical shape. A partition 2 is arranged in the middle of the rivet body 1, and an upper rivet cavity 3 and a lower rivet cavity 4 formed by the partition 2 are arranged above and below the partition 2. Since the rivet body 1 is in a hollow cylindrical shape, the upper rivet cavity 3 and the lower rivet cavity 4 of the rivet body 1 can penetrate into the plate, and then the upper rivet cavity 3 and the lower rivet cavity 4 are respectively connected to the upper plate and the lower rivet cavity 4 is respectively connected to the lower plate through deformation of the upper rivet cavity 3 and the lower rivet cavity 4 and the plate, thereby connecting the upper and lower plates. Support members 5 are respectively installed in the rivet upper cavity 3 and the rivet lower cavity 4 in an interference fit manner to provide compressive strength to the legs of the rivet body 1 corresponding to the support members 5. The support of the support members 5 prevents the legs of the rivet body 1 from collapsing inward or bending laterally, thereby avoiding the legs of the rivet body 1 from being compressed, bent and deformed, thereby ensuring that the two end ends of the rivet body 1 can accurately penetrate into the preset positions of the plate, ensuring accurate and effective connection with the plate; the support member 5 can also deform itself after being inserted into the plate to form an internal lock with the plate, further increasing the strength of the entire connection structure.

[0015] The function of the partition 2 is to limit the depth of the rivet body 1 inserted into the plate through the interaction between the partition 2 and the plate, thereby preventing the rivet from being inserted into the plate excessively, thereby ensuring that the portion of the rivet body 1 that has not been inserted into the plate has sufficient length to be inserted into the plate, ensuring that both ends of the rivet body 1 are respectively connected to the insertion of the plate.

[0016] The length of the upper part of the rivet body 1 is h1, and the length h1 is determined by the thickness t of the upper plate of the rivet. 上材 Design, h1=(0.2~0.4)t 上材 So that the rivet will not pierce the plate, but also has sufficient margin to penetrate the plate to connect the plates.

[0017] The length of the lower part of the rivet body 1 is h2, and the length h2 is determined by the thickness t of the lower plate of the rivet. 下材 Design, h2=(0.2~0.4)t 下材 .

[0018] The height from the bottom of the support member 5 in the upper part of the rivet body 1 to the middle of the rivet body 1 is set to t1, t1=(0.4~0.6)h1, to ensure that the support member 5 will not affect the penetration of the rivet body 1 into the plate, and can also support the rivet body 1, ensuring that the rivet body 1 is not easily collapsed or bent and deformed during the penetration of the plate.

[0019] Assume that the height from the bottom of the support member 5 in the lower half of the rivet body 1 to the middle of the rivet body 1 is t2, t2=(0.4~0.6)h2.

[0020] An annular boss 6 is provided on the outer circumference of the rivet body 1 corresponding to the partition 2. Assume that the diameter of the annular boss 6 is Ø1, and the aperture of the center hole of the rivet is Ø2, Ø1=(2~3)Ø2. The function of the annular boss 6 is to further limit the penetration of the rivet into the plate through the interaction between the annular boss 6 and the plate, and to ensure that the rivet body 1 is not easily excessively inserted into the plate by cooperating with the partition through the annular boss 6, thereby ensuring that the two ends of the rivet body 1 are respectively connected to the plate. The edge of the annular boss 6 and the rivet body 1 are transitioned through an arc, so that the plate is retracted inward through the arc surface between the annular boss 6 and the rivet body 1 during the extrusion of the plate, so that the upper and lower plates are easier to fit.

[0021] The support member 5 is cup-shaped, and the port of the support member 5 and the upper and lower ports of the rivet body 1 are respectively inverted at 30-60 degrees. The port of the support member 5 and the upper and lower ports of the rivet body 1 are respectively inclined inwards, so that during the process of inserting the rivet body 1 and the support member 5 into the plate, the ports of the support member 5 and the rivet body 1 are respectively guided to deform and expand outwards through the inverted ports, so that the rivet body 1 and the support member 5 can be mutually limited with the plate through deformation, thereby connecting the plate with the rivet body 1.

[0022] The riveting method of the semi-hollow butt rivet comprises the following steps: Place the connection position of the lower plate on the flat plate mold to fix the lower plate.

[0023] The rivet body 1 is inserted into a lower die with an inverted "mountain"-shaped cross section. The lower die has a limiting function. When the lower die contacts the surface of the upper plate, it is not easy to move downward, thereby limiting the depth of the rivet body 1 inserted downward into the plate.

[0024] The punching machine is started. The punching machine inserts the lower part of the rivet body 1 into the lower plate on the flat die through the lower pressing die. During the insertion of the rivet body 1, the rivet body 1 is supported by the support member 5 to prevent the rivet body 1 from shrinking or bending inward. During the insertion of the rivet body 1, the rivet body 1 expands and deforms outward under the guidance of the inverted mouth of the port of the rivet body 1 and is connected and locked with the lower plate. During the insertion of the rivet body 1, the support member 5 expands outward under the guidance of the inverted mouth. The support member 5 supports the rivet body 1, making it difficult for the rivet body 1 to shrink inward, and further making it difficult for the rivet body 1 to separate from the lower plate, ensuring the stability and reliability of the connection between the rivet body 1 and the lower plate.

[0025] After the rivet body 1 is inserted, the lower pressing die is moved upward and reset.

[0026] After the lower pressing die is reset, the upper plate connected to the upper part of the rivet body 1 is placed above the rivet body 1 .

[0027] The upper plate is pressed down by the lower pressing die of the flat plate, so that the upper part of the rivet body 1 and the support member 5 penetrate into the upper plate and connect with the upper plate, and then the upper plate and the lower plate are connected through the rivet.

[0028] The semi-hollow butt rivet has a simple structure, and the upper cavity and the lower cavity of the rivet can be supported by the support member, and the rivet can be effectively strengthened by the support member to prevent the rivet from collapsing inward or bending laterally during the process of piercing the plate, and can effectively ensure that the rivet penetrates the plate and penetrates into the correct position, thereby ensuring that the rivet is accurately positioned and the connection between the plates is reliable, and the stability of the connection is effectively ensured. The existing semi-hollow rivet is not accurately positioned during the plate connection process, and the problem that the rivet leg is bent and deformed, resulting in the inability to achieve an effective connection between the plates, is solved. Example 2

[0029] The semi-hollow butt rivet is composed of a rivet body 1, which is in a hollow cylindrical shape. A partition 2 is arranged in the middle of the rivet body 1, and an upper rivet cavity 3 and a lower rivet cavity 4 formed by the partition 2 are arranged above and below the partition 2. Since the rivet body 1 is in a hollow cylindrical shape, the upper rivet cavity 3 and the lower rivet cavity 4 of the rivet body 1 can penetrate into the plate, and then the upper rivet cavity 3 and the lower rivet cavity 4 are respectively connected to the upper plate and the lower rivet cavity 4 is respectively connected to the lower plate through deformation of the upper rivet cavity 3 and the lower rivet cavity 4 and the plate, thereby connecting the upper and lower plates. A support member 5 is slidably installed in the rivet upper cavity 3 and the rivet lower cavity 4, respectively. A connecting rod 7 is movably installed in the central part of the partition 2 through a through hole. One end of the connecting rod 7 is threadedly connected to the support member 5 of the rivet upper cavity 3, and the other end of the connecting rod 7 is fixedly connected to the support member 5 of the rivet lower cavity 4, so as to provide compressive strength to the leg of the rivet body 1 corresponding to the support member 5. The support of the support member 5 prevents the leg of the rivet body 1 from collapsing inward or bending laterally, and avoids the leg of the rivet body 1 from bending and deforming under pressure, thereby ensuring that the two ends of the rivet body 1 can accurately penetrate the preset position of the plate, respectively, and ensure accurate and effective connection with the plate. Since the connecting rod 7 and the partition 2 and the support member 5 and the riveted body 1 slide relative to each other, the support member 5 can be closer to the port of the riveted body 1, thereby providing more support to the riveted body 1, further ensuring that the riveted body 1 is not easy to collapse or bend inward; the support member 5 can also deform itself after being inserted into the plate to form an internal lock with the plate, further increasing the strength of the entire connection structure, and the strength is higher than that of Example 1.

[0030] The function of the partition 2 is to limit the depth of the rivet body 1 inserted into the plate through the interaction between the partition 2 and the plate, thereby preventing the rivet from being inserted into the plate excessively, thereby ensuring that the portion of the rivet body 1 that has not been inserted into the plate has sufficient length to be inserted into the plate, ensuring that both ends of the rivet body 1 are respectively connected to the insertion of the plate.

[0031] The length of the upper part of the rivet body 1 is h1, and the length h1 is determined by the thickness t of the upper plate of the rivet.上材 Design, h1=(0.2~0.4)t 上材 So that the rivet will not pierce the plate, but also has sufficient margin to penetrate the plate to connect the plates.

[0032] The length of the lower part of the rivet body 1 is h2, and the length h2 is determined by the thickness t of the lower plate of the rivet. 下材 Design, h2=(0.2~0.4)t 下材 .

[0033] The height from the bottom of the support member 5 in the upper part of the rivet body 1 to the middle of the rivet body 1 is set to t1, t1=(0.4~0.6)h1, to ensure that the support member 5 will not affect the penetration of the rivet body 1 into the plate, and can also support the rivet body 1, ensuring that the rivet body 1 is not easily collapsed or bent and deformed during the penetration of the plate.

[0034] Assume that the height from the bottom of the support member 5 in the lower half of the rivet body 1 to the middle of the rivet body 1 is t2, t2=(0.4~0.6)h2.

[0035] An annular boss 6 is provided on the outer circumference of the rivet body 1 corresponding to the partition 2. Assume that the diameter of the annular boss 6 is Ø1, and the aperture of the center hole of the rivet is Ø2, Ø1=(2~3)Ø2. The function of the annular boss 6 is to further limit the penetration of the rivet into the plate through the interaction between the annular boss 6 and the plate, and to ensure that the rivet body 1 is not easily excessively inserted into the plate by cooperating with the partition through the annular boss 6, thereby ensuring that the two ends of the rivet body 1 are respectively connected to the plate. The edge of the annular boss 6 and the rivet body 1 are transitioned through an arc, so that the plate is retracted inward through the arc surface between the annular boss 6 and the rivet body 1 during the extrusion of the plate, so that the upper and lower plates are easier to fit.

[0036] The support member 5 is cup-shaped, and the port of the support member 5 and the upper and lower ports of the rivet body 1 are respectively inverted at 30-60 degrees. The port of the support member 5 and the upper and lower ports of the rivet body 1 are respectively inclined inwards, so that during the process of inserting the rivet body 1 and the support member 5 into the plate, the ports of the support member 5 and the rivet body 1 are respectively guided to deform and expand outwards through the inverted ports, so that the rivet body 1 and the support member 5 can be mutually limited with the plate through deformation, thereby connecting the plate with the rivet body 1.

[0037] The riveting method of the semi-hollow butt rivet comprises the following steps: Place the connection position of the lower plate on the flat plate mold to fix the lower plate.

[0038] The rivet body 1 is inserted into a lower die with an inverted cup-shaped cross section. The lower die has a limiting function. When the lower die contacts the surface of the upper plate, it is not easy to move downward, thereby limiting the depth of the rivet body 1 inserted downward into the plate.

[0039] The punching machine is started, and the punching machine inserts the lower part of the rivet body 1 into the lower plate on the flat die through the lower pressing die. During the insertion of the rivet body 1, the support member 5 moves downward to the end of the rivet body 1 under the action of its own gravity, and the rivet body 1 is supported by the support member 5 throughout the whole process to prevent the rivet body 1 from collapsing or bending inward; during the insertion of the rivet body 1, the lower plate gradually pushes the support member 5 upward until the bottom of the support member 5 abuts against the partition 2; after the support member 5 in the rivet lower cavity 4 abuts against the partition 2, the support member 5 in the rivet upper cavity 3 moves to the end of the rivet upper cavity 3. During the insertion of the rivet body 1, it expands and deforms outward under the guidance of the inverted mouth of the rivet body 1 end to connect and lock with the lower plate. During the insertion process of the rivet body 1, after the support member 5 abuts against the partition 2, the support member 5 expands outward under the guidance of the pouring mouth, and the rivet body 1 is supported by the support member 5, so that the rivet body 1 is not easy to shrink inward, and further the rivet body 1 is not easy to separate from the lower plate, ensuring the stability and reliability of the connection between the rivet body 1 and the lower plate.

[0040] After the rivet body 1 is inserted, the lower pressing die is moved upward and reset.

[0041] After the lower pressing die is reset, the upper plate connected to the upper part of the rivet body 1 is placed above the rivet body 1 .

[0042] The upper plate is pressed down by the lower pressing die of the flat plate, so that the upper part of the rivet body 1 and the support member 5 penetrate into the upper plate and connect with the upper plate, and then the upper plate and the lower plate are connected by the rivet. In the process of pressing down the upper plate, the upper plate presses down the support member 5 in the rivet upper cavity 3. The support member 5 in the rivet upper cavity 3 pushes the support member 5 in the rivet lower cavity 4 through the connecting rod 7 to further insert into the lower plate, so that the support member 5 is inserted into the upper plate and the lower plate respectively to achieve balance.

[0043] The semi-hollow butt rivet has a simple structure. The upper cavity and the lower cavity of the rivet can be supported by the support member. The rivet can be effectively strengthened by the support member to prevent the rivet from collapsing inward or bending laterally during the process of piercing the plate. The rivet can be effectively ensured to penetrate the plate and penetrate into the accurate position, thereby ensuring that the rivet is accurately positioned and the connection between the plates is reliable, effectively ensuring the stability of the connection. The sliding support member can provide more support for the rivet body. The problem of inaccurate positioning of the existing semi-hollow rivets during the process of connecting the plates and the inability to achieve effective connection between the plates due to bending and deformation of the rivet legs is solved.

Claims

1. A semi-hollow butt rivet, comprising a rivet body (1), characterized in that: The rivet body (1) is in the shape of a hollow cylinder. A partition (2) is provided in the middle of the rivet body (1). An upper rivet cavity (3) and a lower rivet cavity (4) formed by the partition (2) are provided above and below the partition (2). Support members (5) are respectively installed in the upper rivet cavity (3) and the lower rivet cavity (4) in an interference fit to provide compressive strength to the leg of the rivet body (1) corresponding to the support member (5), thereby preventing the leg of the rivet body (1) from being bent and deformed under pressure.

2. A semi-hollow butt rivet according to claim 1, characterized in that: An annular boss (6) is provided on the outer circumference of the rivet body (1) corresponding to the partition (2).

3. A semi-hollow butt rivet according to claim 1, characterized in that: The support member (5) is cup-shaped, and the port of the support member (5) and the upper and lower ports of the rivet body (1) are respectively inverted at 30-60 degrees.

4. A semi-hollow butt rivet, comprising a rivet body (1), characterized in that: The rivet body (1) is in the shape of a hollow cylinder. A partition (2) is provided in the middle of the rivet body (1). An upper rivet cavity (3) and a lower rivet cavity (4) formed by the partition (2) are provided above and below the partition (2). Support members (5) are slidably mounted in the upper rivet cavity (3) and the lower rivet cavity (4). A connecting rod (7) is movably mounted in the center of the partition (2) through a through hole. One end of the connecting rod (7) is threadedly connected to the supporting member (5) of the upper rivet cavity (3), and the other end of the connecting rod (7) is fixedly connected to the supporting member (5) of the lower rivet cavity (4) to provide compressive strength to the leg of the rivet body (1) corresponding to the supporting member (5), thereby preventing the leg of the rivet body (1) from being bent and deformed under pressure.

5. A semi-hollow butt rivet according to claim 4, characterized in that: An annular boss (6) is provided on the outer circumference of the rivet body (1) corresponding to the partition (2).

6. A semi-hollow butt rivet according to claim 4, characterized in that: The support member (5) is cup-shaped, and the port of the support member (5) and the upper and lower ports of the rivet body (1) are respectively inverted at 30-60 degrees.

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