CN109424610B

CN109424610B - Press riveting piece

Info

Publication number: CN109424610B
Application number: CN201811360294.3A
Authority: CN
Inventors: 陈小明; Q·孙
Original assignee: Pem China Co ltd
Current assignee: Pem China Co ltd
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2023-07-25
Anticipated expiration: 2038-11-15
Also published as: CN109424610A

Abstract

The application relates to a press rivet, comprising: a head; a guide post extending from the head, the cross section of the guide post matching with a mounting hole in the sheet to be clinched, so that the guide post can be inserted into the mounting hole and move along the axial direction of the guide post; and at least one locking portion extending from the head and disposed at least partially around the guide post, wherein the locking portion comprises: at least one self-fastening groove extending circumferentially around the guide post, the self-fastening groove being used for accommodating the material of the plate to be clinched which is extrusion-flowed in the process of clinching the plate to be clinched by the clinching piece; and the discharging parts are positioned at two sides of the self-fastening groove and are used for extruding the material of the plate to be riveted so as to enable the material to flow into and be kept in the self-fastening groove.

Description

Press riveting piece

Technical Field

The present application relates to riveting technology, and more particularly, to a clinch.

Background

The press riveting is a riveting method for upsetting a rivet rod to form an upsetting head by utilizing static pressure generated by a press riveting machine. The riveting piece of the press riveting has the characteristics of good surface quality, small deformation, high connection strength and the like, so that the press riveting piece is widely applied to various machining fields, such as shipbuilding, automobile manufacturing, aerospace, white household appliances and the like. In recent years, with the rapid development of the market of household consumer electronic products, the press riveting demand for ultrathin plates in electronic products is increasing. However, it is difficult to effectively meet the press riveting requirements for ultra-thin sheets due to the limitations of the conventional press riveting fasteners or fasteners themselves in terms of structure and manufacturing process.

Disclosure of Invention

The application provides a press riveting piece, it can effectively satisfy the press riveting demand to ultra-thin panel.

In one aspect of the present application, there is provided a clinch element comprising: a head; a guide post extending from the head, the cross section of the guide post matching with a mounting hole in the sheet to be clinched, so that the guide post can be inserted into the mounting hole and move along the axial direction of the guide post; and at least one locking portion extending from the head and disposed at least partially around the guide post, wherein the locking portion comprises: at least one self-fastening groove extending circumferentially around the guide post, the self-fastening groove being used for accommodating the material of the plate to be clinched which is extrusion-flowed in the process of clinching the plate to be clinched by the clinching piece; and the discharging parts are positioned at two sides of the self-fastening groove and are used for extruding the material of the plate to be riveted so as to enable the material to flow into and be kept in the self-fastening groove.

In some embodiments, the self-clinching groove has an opening configured to generally face the sheet material to be clinched during clinching to allow material of the sheet material to be clinched to flow under pressure to flow into the self-clinching groove through the opening.

In some embodiments, the locking portion is shaped as a hollow cylindrical structure extending from the head portion.

In some embodiments, the self-fastening slot further comprises: the material containing area is used for containing the material of the plate to be riveted flowing into the self-fastening groove through the opening; and a restriction region located between the material containing region and the opening, and having a minimum length extending along a circumferential direction of the locking portion that is smaller than a maximum length extending along the circumferential direction of the locking portion to restrict a material contained in the material containing region from flowing toward the opening.

In some embodiments, the self-fastening groove has a T-shaped or inverted L-shaped, dovetail-shaped or inverted dovetail-shaped profile.

In some embodiments, the volume ratio of the discharge portion to the receiving area is not less than 1.

In some embodiments, the guide post has a guide portion on an end remote from the head portion, the guide portion configured to guide movement of the guide post into the mounting hole of the sheet material to be clinched.

In some embodiments, the standoff includes a plurality of self-clinching grooves spaced apart along the circumference of the locking portion.

In some embodiments, the standoff includes a plurality of locking portions spaced around the guide post.

In some embodiments, the volume ratio of the discharge portion to the receiving area is 1 to 2.

In some embodiments, the locking portion is integrally formed with the guide post.

In some embodiments, the locking portion, the guide post, and the head are integrally formed.

The foregoing is a summary of the application and there may be cases where details are simplified, summarized and omitted, so those skilled in the art will recognize that this section is merely illustrative and is not intended to limit the scope of the application in any way. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Drawings

The above-mentioned and other features of the present application will be more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. It is appreciated that these drawings depict only several embodiments of the present application and are therefore not to be considered limiting of its scope. The present application will be described more specifically and in detail by using the accompanying drawings.

FIG. 1 illustrates a perspective view of a standoff 100 according to one embodiment of the present application;

FIG. 2 illustrates a front view of the standoff 100 shown in FIG. 1;

FIG. 3 illustrates a bottom view of the standoff 100 shown in FIG. 1;

FIG. 4 shows a cross-sectional view of the standoff 100 of FIG. 1 with its guide post aligned with a mounting hole in a sheet of material to be standoff;

fig. 5 shows a cross-sectional view of the clinch element 100 of fig. 1 after it has been snapped into a sheet material to be clinched.

Detailed Description

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter of the present application. It will be readily understood that the aspects of the present application, as generally described herein, and illustrated in the figures, could be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated as part of this application.

Fig. 1 illustrates a schematic view of a standoff 100 according to one embodiment of the present application, fig. 2 illustrates a front view of the standoff 100 illustrated in fig. 1, and fig. 3 illustrates a bottom view of the standoff 100 illustrated in fig. 1.

As shown in fig. 1, the clinch element 100 has a head 101 and a guide post 102 extending from the head 101. Although the cross-sections of the head 101 and the guide post 102 are shown as being circular in shape, in some embodiments, the cross-sections of the head 101 and the guide post 102 may be any other shape, such as triangular, quadrilateral, pentagonal, hexagonal, octagonal, etc., with quadrilateral and hexagonal shapes being preferred. It should be noted that the cross-sectional dimension of the head 101 is generally larger than the size of the mounting hole on the plate to be clinched, while the cross-sectional shape of the guide post 102 needs to be matched with the size of the mounting hole on the plate to be clinched, and the dimension thereof is generally equal to or slightly smaller than the size of the mounting hole on the plate to be clinched, so that the clinched member 100 can be aligned and inserted into the corresponding mounting hole on the plate to be clinched through the guide post 102. In some embodiments, the guide post 102 may also have a size slightly larger than the mounting hole. In the press-riveting process, the press-riveting member 100 may be relatively moved in the axial direction of the guide post 102 in the mounting hole, and the plate to be press-riveted is press-riveted, so that the press-riveting member 100 is riveted with a designated position on the plate to be press-riveted.

Referring to fig. 1 and 2, the guide post 102 of the clincher 100 is further provided with a guide portion 121 at the end remote from the head 101, the guide portion 121 for guiding the guide post 102 into the mounting hole of the sheet material to be clinched. In some embodiments, the guide is a chamfer disposed at the end of the guide post 102 remote from the head 101. In some embodiments, the head 101 and the guide post 102 of the standoff 100 may be manufactured separately and attached to each other by welding or bonding. In other embodiments, the head 101 and the guide post 102 of the rivet 100 may be integrally formed.

As shown in fig. 1 to 3, the clinch element 100 also has a locking portion 103 disposed around the guide post 102. In the press-riveting process of the press-riveting piece 100 to-be-riveted plate, the locking part 103 is in contact extrusion with the plastic to-be-riveted plate, so that partial material of the to-be-riveted plate is extruded and flowed. After the press-riveting process is completed, the local material is not subjected to external force and stops flowing, so that the locking part 103 can lock or hold the material of the plate to be press-riveted flowing into the locking part, thereby locking the press-riveting piece 100 at a designated position on the plate to be press-riveted.

With continued reference to fig. 1-3, the locking portion 103 of the standoff 101 includes a cylindrical structure disposed about the guide post 102. The locking portion 103 may be other structures that are at least partially disposed around the guide post 102. In some embodiments, the locking portion 103 of the clinch element 100 may also be provided as a hollow cylindrical structure of other shapes, such as square, pentagonal, hexagonal, and other polygonal cylindrical structures, and the like. It should be noted that although the clinch element 100 shown in fig. 1-3 has only one locking portion 103, in other embodiments, the clinch element may have a plurality of locking portions extending at least partially circumferentially around the guide post 102 shown in the drawings, and the locking portions may be correspondingly arranged in different arrangements depending on the shape thereof. For example, in some embodiments, the plurality of locking portions are in a cylindrical structure with different sizes, and the locking portions with different sizes are arranged layer by layer around the guide post 102 as shown in the figure in order of size from small to large. In particular, in some embodiments, the clinch element may have cylindrical locking portions of diameter ranging from small to large, and the locking portions may be arranged around the guide post in concentric circles about the guide post. It is noted that in some embodiments, the locking portion in the clinch element of the present application may also be shaped as a portion of the circumference of a circular or polygonal structure surrounding the pilot post of the clinch element, and in particular in some embodiments, the clinch element may include a plurality of partial structures as described above that are spaced apart from one another along the circumference of a circle or polygon surrounding the pilot post of the clinch element.

In some embodiments, the locking portion 103 generally conforms to the guide post 102 such that there is generally no gap therebetween. For example, the inner diameter of the locking portion 103 is the same as the outer diameter of the guide post 102. This can avoid the material of the part to be clinched from flowing into the gap during clinching and not into the self-fastening groove, and also helps to reduce the cross-sectional size of the entire clinched piece. In other embodiments, a gap is provided between the locking portion 103 and the guide post 102.

In some embodiments, the head 101 and the locking portion 103 of the clinch element 100 may be manufactured separately and attached to one another by welding or bonding. In some embodiments, the head 101 and the locking portion 103 of the rivet 100 may be integrally formed. In other embodiments, the head 101, the guide post 102, and the locking portion 103 of the rivet 100 may be integrally formed.

As shown in fig. 2, the locking portion 103 of the clinch element 100 includes self-clinching grooves 104 extending along the circumference of the locking portion 103. The self-clinching groove 104 is used to receive the material of the sheet material to be clinched that is being extruded to flow during clinching of the sheet material to be clinched by the clinching member 100. With continued reference to fig. 2, the self-fastening slot 104 has an opening 141, a receiving area 143, and a restriction area 142 between the opening 141 and the receiving area 143. Wherein the opening 141 is generally located furthest from the head 101 from the fastening slot 104. When the clincher 100 clinches a plate material to be clinched, the material of the plate material to be clinched, which is extrusion-flowed by the clincher, finally flows into the receiving area 143 through the opening 141 and the restriction area 142.

In some embodiments, the minimum length of the restriction area 142 extending along the circumference of the locking portion 103 is less than the maximum length of the receiving area 143 extending along the circumference of the locking portion 103, so that it is difficult for material of the sheet material to be clinched flowing into the receiving area 143 to flow out of the opening through the restriction area 142. When the clinching is completed, sufficient material remains in the receiving area 143 and the shape of the material after plastic forming substantially matches the contour of the receiving area 143. In this way, the restriction area 142 having a smaller length may trap material in the receiving area 143 so that the clinch element 100 is locked into place on the sheet material to be clinched.

In some embodiments, the minimum length of the restraining region extending circumferentially along the locking portion may also be equal to or greater than the maximum length of the containment region. For example, the self-fastening groove may be configured as a trumpet-like structure that is open toward it, but the center line of the trumpet-like structure is inclined with respect to the axis of the guide post, so that after the press-riveting is finished, the material flowing into and contained in the self-fastening groove may be caught by the wall of the self-fastening groove. In some embodiments, the self-clinching slots on one clinching member may be skewed in different directions relative to the axis of the guide post, thereby preventing the clinching member from rotating in the mounting aperture.

As shown in fig. 1 and 2, the self-fastening slot 104 in the clinch element 100 is generally T-shaped in profile. In some embodiments, the self-fastening slot 104 may have other shapes that generally exhibit a relatively larger dimension proximate the receiving area 143 of the head 101 or a greater length extending circumferentially along the locking portion 103, such as an inverted L-shape, a dovetail-shaped or inverted dovetail-shaped profile, or the like.

Although the locking portion 103 of the clinch element 100 is shown as having 4 self-clinching slots 104, it should be noted that in some embodiments, the locking portion 103 of the clinch element 100 may be configured to have any other number of self-clinching slots, such as 1, 2, 3, 5, 6, 7, 8, etc., which may be configured to be spaced apart along the locking portion 103.

With continued reference to fig. 1 and 2, the locking portion 103 of the clinch element 100 also has a discharge portion 105 thereon, the discharge portion 105 being located on either side of the self-clinching slot 104 and being adapted to compress the material of the sheet material to be clinched so as to flow at least partially into the self-clinching slot 104. It will be appreciated that the discharge portion 105 has a complementary profile to the self-fastening groove 104. As shown in particular in fig. 2, the discharge portions 105 located on both sides of the single self-fastening groove 104 actually define the restriction area 142 of the self-fastening groove 104, that is, the discharge portions 105 described herein refer to the circumferential extension of the locking portion 103 on both sides of the self-fastening groove 104 and generally corresponding to the restriction area of the self-fastening groove 104. In the embodiment shown in fig. 2, the discharge portion 105 has a contour substantially identical to the receiving area 143 of the self-fastening groove 104. In some embodiments, the volume ratio of the single discharge portion 105 to the receiving area 143 of the self-fastening groove 104 is not less than 1. In some embodiments, the volume ratio of the single discharge portion 105 to the receiving area 143 of the self-fastening groove 104 is preferably 1 to 2, so as to achieve the best balance between the convenience of clinching and the firmness of the final clinching, wherein the preferred volume ratio is 1.8. It should be noted that in some embodiments, the volume ratio of the single discharge portion 105 to the receiving area 143 of the self-fastening groove 104 may be less than 1.

It should be noted that, although not shown in the figures, in some embodiments, the head 101 of the clincher 100 may have an inwardly extending threaded hole or ornamental structure, or the like. In some embodiments, the material of the standoff is preferably carbon steel, stainless steel or aluminum, copper-based alloys, nickel alloys.

Fig. 4 shows a cross-sectional view of the clinch element 100 of fig. 1 with its guide posts 102 aligned with mounting holes 201 in a sheet material 200 to be clinched. Fig. 5 shows a cross-sectional view of the clinch element 100 of fig. 1 after it has been snapped into a sheet 200 to be clinched. The clinching process using clinching member 100 is described below with particular reference to fig. 4 and 5:

referring to fig. 4, first, the mounting holes 201 of the sheet material 200 to be clinched are aligned by the guide posts 102 of the clincher 100. Subsequently, the clincher 100 is pushed to move toward the sheet material to be clinched 200 along the axial direction of the guide post 102 thereof, so that the discharge portion 105 of the clincher 100 contacts the sheet material to be clinched 200 and presses the material at the contact portion so as to flow along the contour of the discharge portion 105. Along with the continued movement of the clinch element 100 toward the sheet material 200 to be clinched, the material of the sheet material 200 to be clinched which is being clinched flows through the opening of the self-clinching slot of the clinch element, through the restriction zone, and finally into the receiving zone.

As shown in fig. 5, the head 101 of the clinch element 100 is finally brought into contact with the sheet material 200 to be clinched, and the clinching process is completed. At this time, since the self-fastening groove is filled with the material of the sheet material 200 to be clinched and the material is not easily discharged from the receiving area of the self-fastening groove through the restriction area, a good locking effect is generated. In addition, the riveting piece structure is used for greatly shortening the length requirement of the riveting piece, and further meeting the requirements of connecting the ultrathin metal plates or riveting workpieces on the ultrathin metal plates, which are urgently needed in the market.

It should be noted that while reference is made to the different portions of the clinch element and sub-portions of those different portions in the above detailed description, such a division is merely exemplary and not mandatory. For example, the restriction area and the opening of the self-fastening groove described above may also be collectively referred to as an opening portion according to an embodiment of the present application.

Other variations to the disclosed embodiments can be understood and effected by those skilled in the art by studying the specification, the disclosure, and the drawings, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the terms "a" and "an" do not exclude a plurality. In the practice of the present application, one part may perform the functions of a plurality of technical features recited in the claims. Any reference signs in the claims shall not be construed as limiting the scope.

Claims

1. A clinch element, comprising:

a head;

a guide post extending from the head, the cross section of the guide post matching with a mounting hole in the sheet to be clinched, so that the guide post can be inserted into the mounting hole and move along the axial direction of the guide post; and

at least one locking portion extending from the head and disposed at least partially around the guide post, wherein the locking portion comprises:

at least one self-fastening groove extending circumferentially around the guide post, the self-fastening groove being used for accommodating the material of the plate to be clinched which is extrusion-flowed in the process of clinching the plate to be clinched by the clinching piece; and

the discharging parts are positioned at two sides of the self-fastening groove and are used for extruding the material of the plate to be riveted so as to enable the material to flow into and be kept in the self-fastening groove;

wherein the self-clinching groove has an opening configured to be generally directed toward the sheet material to be clinched during clinching to allow material of the sheet material to be clinched to flow under pressure to flow into the self-clinching groove through the opening, the self-clinching groove further comprising:

the material containing area is used for containing the material of the plate to be riveted flowing into the self-fastening groove through the opening; and

a restriction region located between the containment region and the opening, and having a minimum length extending along a circumferential direction of the locking portion that is less than a maximum length of the containment region extending along the circumferential direction of the locking portion to restrict a flow of material contained in the containment region to the opening.

2. The clinch element of claim 1, wherein the locking portion is in the shape of a hollow cylindrical structure extending from the head portion.

3. The standoff of claim 1 wherein the self-clinching groove has a T-shaped, inverted L-shaped, dovetail-shaped or inverted dovetail-shaped profile.

4. The standoff of claim 1 wherein the volume ratio of the discharge portion to the receiving area is not less than 1.

5. The standoff of claim 1 wherein the guide post has a guide on an end remote from the head, the guide configured to guide movement of the guide post into the mounting hole of the sheet material to be standoff.

6. The standoff of claim 1 wherein the standoff comprises a plurality of self-clinching grooves spaced circumferentially about the locking portion.

7. The clinch element of claim 1, including a plurality of locking portions spaced around the guide post.

8. The clinch element of claim 1, wherein the volume ratio of the discharge portion to the receiving area is from 1 to 2.

9. The standoff of claim 1 wherein the locking portion is integrally formed with the guide post.

10. The standoff of claim 9 wherein the locking portion, the guide post and the head are integrally formed.