CN215673084U - Prevent changeing from piercing rivet and have its connecting device - Google Patents

Abstract

The utility model discloses an anti-rotation self-piercing rivet and a connecting device with the same, wherein the anti-rotation self-piercing rivet comprises a rivet body, the rivet body comprises a rivet head and a rivet shaft, and the outer contour of the radial section of the rivet shaft is polygonal, so that a plurality of anti-rotation convex edges are formed on the outer wall of the rivet shaft; the rivet head lateral wall is the arc, and is provided with a plurality of arc bead on its outer wall. The connecting device comprises a plurality of mounting plates which are arranged in a stacked mode and fixedly connected through anti-rotation self-piercing rivets, and anti-rotation convex ridges are embedded in the mounting plates to prevent the mounting plates from rotating. When the single-point riveting is carried out on the plate, the plate is limited by the arc-shaped convex edge and the anti-rotation convex edge and is difficult to rotate, so that the anti-rotation performance of the single-point riveting is improved. The mounting plate of the connecting device can be used for mounting or connecting other devices or parts, and the whole connecting device can achieve a stable connecting effect because the mounting plate can be kept stable.

Description

Prevent changeing from piercing rivet and have its connecting device

Technical Field

The utility model relates to the field of self-piercing rivets, in particular to an anti-rotation self-piercing rivet and a connecting device with the same.

Background

Self-piercing riveting is a cold joining technique for joining two or more metal sheets; the principle is that a self-piercing rivet is used for providing power through a hydraulic cylinder or a servo motor, the self-piercing rivet is directly pressed into a plate to be riveted, the plate to be riveted and the rivet are subjected to plastic deformation under the pressure action of the rivet, and the plate to be riveted is filled in a riveting die after deformation, so that a brand new plate connecting technology for stable connection is formed.

When riveting two plates, the plates need to be pre-positioned, and then the riveting is carried out on the plates one by one; however, when the first rivet is riveted, after the existing self-piercing rivet is riveted at a single point, the two layers of plates can relatively rotate around the axis of the rivet, which easily causes the plates to be dislocated due to external force, thereby affecting the accuracy of subsequent riveting; in addition, in some production processes requiring single-point riveting for fixing, the conventional self-piercing rivet is difficult to stably connect the plates; therefore, a new rivet needs to be developed, which can perform a good positioning on the plate when riveting at a single point.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the anti-rotation self-piercing rivet which can prevent the plates from rotating relatively when the plates are riveted at a single point, so that the plates are stably positioned.

The utility model is realized by the following technical scheme:

the utility model provides a prevent changeing from piercing rivet, includes the rivet body, the rivet body includes the rivet head and directly impresses the rivet axle of treating in the riveting panel through power drive, rivet axle radial cross section outline is the polygon, makes to be formed with a plurality of beads that prevent changeing on its outer wall, prevent changeing the bead and inlay and locate in order to prevent that the panel rotates for the rivet axle in the panel.

Furthermore, the outer contour of the radial section of the rivet shaft is a regular polygon, so that the anti-rotation convex edges are uniformly distributed along the circumferential direction of the rivet shaft.

Furthermore, the outer contour of the radial section of the rivet shaft is in a regular pentagon shape.

Furthermore, the outer contour of the radial section of the rivet shaft is in a regular hexagon shape.

Furthermore, prevent changeing the bead and set up arc chamfer, prevent changeing bead and rivet axle surface smooth transition.

Furthermore, the outer side wall of the rivet head is arc-shaped, and a plurality of arc-shaped convex edges are arranged on the outer wall of the rivet head.

Further, rivet head, rivet axle and arc bead integrated into one piece set up.

Furthermore, an inner tangent plane is arranged on the inner wall of the bottom of the rivet shaft, so that the bottom of the section of the inner wall is conical.

The utility model also discloses a connecting device with the anti-rotation self-piercing rivet, which comprises a plurality of mounting plates, wherein the mounting plates are stacked; the rivet shaft is directly pressed into the mounting plate through power driving, so that the stacked mounting plates are fixedly connected; the anti-rotation convex ribs are embedded in the mounting plate to prevent the mounting plate from rotating relative to the rivet shaft.

Compared with the prior art, the utility model has the advantages that:

1. through setting the radial cross-section outline of rivet axle to the polygon, make to form a plurality of beads that prevent changeing on its outer wall, can play and make the rivet axle prevent that panel from taking place pivoted effect round the rivet axle when the panel is impressed.

2. Through setting the radial cross-section outline of the rivet shaft into a regular polygon, the anti-rotation convex edges can be uniformly distributed on the outer wall of the rivet shaft, the anti-rotation effect can be better achieved, the rivet shaft is conveniently and outwardly propped, and the plate is conveniently riveted and pressed.

3. Through the setting of arc bead, can further improve and prevent changeing the effect.

4. Through the arrangement of the inner tangent plane, the rivet shaft can conveniently pierce the plate, thereby facilitating riveting.

Drawings

FIG. 1 is a perspective view of a hexagonal rivet in accordance with one embodiment of the present invention;

FIG. 2 is a schematic front view of a hexagonal rivet in accordance with one embodiment of the present invention;

FIG. 3 is a bottom view of a hexagonal rivet in accordance with one embodiment of the present invention;

FIG. 4 is a cross-sectional schematic view of a hexagonal rivet according to one embodiment of the present invention;

FIG. 5 is a schematic perspective view of a pentagonal rivet in accordance with one embodiment of the present invention;

FIG. 6 is a schematic front view of a pentagonal rivet in accordance with one embodiment of the present invention;

FIG. 7 is a bottom view of a pentagonal rivet in accordance with one embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a pentagonal rivet in accordance with one embodiment of the present invention;

fig. 9 is a schematic structural diagram of a connecting device according to an embodiment of the utility model.

1. A rivet head; 2. a rivet shaft; 3. an anti-rotation convex rib; 4. an arc-shaped rib; 5. cutting into internal sections; 6. a radial cross-sectional outer profile; 7. and (7) mounting the plate.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

As shown in fig. 1, an anti-rotation self-piercing rivet according to an embodiment of the present invention includes a rivet body, and the rivet body includes a rivet head 1 and a rivet shaft 2. The inside cavity of rivet axle 2 sets up, and its radial cross section outline 6 is the polygon, can make to form a plurality of beads 3 that prevent changeing on the 2 outer walls of rivet axle like this, prevent changeing the polygonal angle one-to-one of bead 3 and the 2 radial cross sections of rivet axle. When riveting, pre-positioning two or more layers of plates, and then piercing and pressing a rivet shaft of the rivet into the plates by using a power driving device (the prior art); compared with the traditional self-piercing rivet, the rivet is difficult to rotate around the rivet shaft 2 due to the limitation of the anti-rotation convex edge 3 on the outer wall of the rivet shaft 2 of the rivet; in addition, the friction force generated by the pretightening force of the riveting process on the plates enables the anti-twisting performance between the plates to be greatly improved. Therefore, when single-point riveting is carried out, stable positioning can be carried out on the plate, and the stability of single-point riveting and the accuracy of subsequent riveting during multi-point riveting are improved.

As shown in fig. 9, when the self-piercing rivet is riveted into a plate, the rivet pierces the plate, and the hollow portion of the rivet shaft 2 is plastically deformed and outwardly expanded due to the insertion of the pierced plate and the ejection of the concave portion of the bottom die, thereby achieving the fixing effect. In order to make this rivet be convenient for the riveting, can set 2 radial cross section outlines 6 of rivet axle to regular polygon, can so be so that prevent changeing bead 3 along 2 circumference evenly distributed of rivet axle, be setting up arc chamfer (refer to fig. 3 and 7) in the 3 department of changeing bead in addition for prevent changeing bead 3 and 2 surface smooth transition of rivet axle, can reduce stress concentration like this, thereby be convenient for rivet axle 2 take place plastic deformation easily and be difficult for bursting apart when the panel is impressed. In addition, prevent changeing 3 evenly distributed of bead at rivet axle 2 surfaces, can also further improve the rotation resistance when panel single-point riveting.

As shown in fig. 1, it is known from tests that, when the cross-sectional shape of the rivet shaft 2 is closer to a circular shape, the rivet shaft 2 is easier to deform and expand outwards, so that riveting is more convenient; however, as the cross section is closer to a circle, the less the anti-rotation capability of the plate, and the overall negative correlation between the two properties is obtained. Through a large amount of experimental tests of the inventor, when the cross-section of the rivet shaft 2 is set to be regular pentagon or regular hexagon, and the rivet shaft is provided with five or six convex edges, the rivet shaft can not only facilitate riveting but also ensure that the rivet shaft has a good anti-rotation effect (refer to fig. 1-8) when riveting single points of the plate, and the effect is optimal when the cross-section of the rivet shaft 2 is set to be regular hexagon. If take 2 radial cross sections of rivet axle to be hexagonal from the piercing rivet to test as the example, adopt 7mm long hexagon to carry out the single-point riveting respectively to two 2 mm's 6061 aluminum plates from piercing rivet and tradition, give 5 KN's of rivet crimping power with the rivet into panel, panel by this hexagon from piercing rivet riveted does not take place the corotation when 50N.m yet, and tradition cylindrical from piercing rivet has taken place the corotation when 2 N.m.

In order to further improve the anti-rotation performance, in the embodiment, the outer side wall of the rivet head 1 is arc-shaped, a plurality of arc-shaped convex edges 4 are arranged on the outer wall of the rivet head, the arc-shaped convex edges 4 can be correspondingly connected with the anti-rotation convex edges 3 one by one, and the number of the arc-shaped convex edges 4 can be set according to actual requirements; in order to facilitate production, the rivet head 1, the arc-shaped convex edge 4 and the rivet shaft 2 can be integrally formed by a cold heading process, so that the arc-shaped convex edge 4 can be embedded into the plate when riveting, and the rotation of the plate is further limited by the rotation-preventing convex edge 3 in cooperation. In addition, set up tangent plane 5 in on rivet axle 2 bottom inner wall, make its inner wall cross-section bottom be the toper, the rivet axle 2 that can be convenient for this rivet punctures panel like this and impresses in the panel.

In addition, the utility model also provides a connecting device, which is shown in fig. 9 and comprises a plurality of mounting plates 7 which are stacked, wherein the mounting plates 7 are riveted and fixed through the rivet; the mounting plate 7 is a carrier for connecting or mounting other devices, and its shape can be designed according to actual requirements. When the connecting device is used for connection or installation, the installation plates 7 are connected through the anti-rotation self-piercing rivets, so that the anti-rotation connecting device has good anti-rotation performance and strong stability; therefore, the carrier for connecting two devices can achieve stable connection effect.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. The utility model provides a prevent changeing from piercing rivet, includes the rivet body, the rivet body includes rivet head (1) and directly impresses rivet axle (2) in treating riveting panel through power drive, a serial communication port, rivet axle (2) radial cross section outline (6) are the polygon, make be formed with a plurality of bead (3) of changeing of preventing on its outer wall, prevent changeing bead (3) and inlay and locate in order to prevent that the panel rotates for rivet axle (2) in the panel.

2. Anti-rotation self-piercing rivet according to claim 1, characterized in that the rivet shaft (2) has a regular polygonal outer contour (6) in radial cross section, so that the anti-rotation ribs (3) are distributed uniformly in the circumferential direction of the rivet shaft (2).

3. Anti-rotation self-piercing rivet according to claim 2, characterized in that the rivet shaft (2) has a radial cross-sectional outer contour (6) which is in the shape of a regular pentagon.

4. Anti-rotation self-piercing rivet according to claim 2, characterized in that the rivet shaft (2) has a regular hexagonal outer contour (6) in radial cross section.

5. An anti-rotation self-piercing rivet according to claim 2, characterized in that the anti-rotation bead (3) is provided with an arc-shaped chamfer, the anti-rotation bead (3) running smoothly with the outer surface of the rivet shaft (2).

6. An anti-rotation self-piercing rivet according to claim 1, characterized in that the rivet head (1) is curved on its outer side wall and has several curved ribs (4) on its outer wall.

7. An anti-rotation self-piercing rivet according to claim 6, characterized in that the rivet head (1), the rivet shaft (2) and the arc-shaped rib (4) are provided in one piece.

8. An anti-rotation self-piercing rivet according to claim 1, characterized in that the rivet shaft (2) is provided with an internal cut (5) on its bottom inner wall, so that its inner wall cross-sectional bottom is conical.

9. A connecting device with an anti-rotation self-piercing rivet according to any one of claims 1 to 8, characterised by comprising a plurality of mounting plates (7), a plurality of said mounting plates (7) being arranged one above the other; the rivet shaft (2) is directly pressed into the mounting plate (7) through power driving, so that the stacked mounting plates (7) are fixedly connected; the anti-rotation convex edge (3) is embedded in the mounting plate (7) to prevent the mounting plate (7) from rotating relative to the rivet shaft (2).

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