CN210547808U

CN210547808U - Self-piercing riveting tool and device

Info

Publication number: CN210547808U
Application number: CN201921559625.6U
Authority: CN
Inventors: 李落星; 刘建鹏; 何洪; 徐从昌
Original assignee: Changsha Zhongteng Metal Materials Technology Co ltd
Current assignee: Changsha Zhongteng Metal Materials Technology Co ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-05-19
Anticipated expiration: 2029-09-18

Abstract

The utility model discloses a self-piercing riveting tool and a device, wherein the tool comprises an upper die base, a male die, a lower die base, a female die and a sample mounting base; the upper die base is used for being fixedly connected with an upper stretching mechanism of a stretching testing machine, the male die is installed at the lower end of the upper die base, and the lower end of the male die is used for fixing a self-punching rivet; the lower die base is used for being fixedly connected with a lower stretching mechanism of a stretching testing machine, the sample mounting base is mounted at the upper end of the lower die base, and the female die is provided with a containing hole matched with the self-piercing rivet; the sample mounting seat is provided with a mounting hole, and the female die is arranged in the mounting hole in a penetrating manner and fixedly connected with the bottom wall of the mounting hole; the upper end face of the sample mounting seat is used for placing a self-piercing riveting sample. The tool can realize the riveting of the self-piercing riveting sample with high reliability of riveting performance by means of a tensile testing machine, and can analyze the quality of the performance of the joint according to a force-displacement curve.

Description

Self-piercing riveting tool and device

Technical Field

The utility model relates to a riveting equipment technical field especially relates to a from dashing riveting tools and device.

Background

Aluminum alloys are gradually adopted by various large host factories due to their low density, light weight, and excellent crashworthiness; the high-strength steel has higher yield strength and tensile strength and higher elongation rate, and is always favored by manufacturers. However, the melting points of steel and aluminum are very different, and hard and brittle intermetallic compounds are easily formed between steel and aluminum by using the traditional welding method. The Self-piercing riveting process (SPR for short) can well solve the problem of difficult connection of steel and aluminum. The conventional self-piercing riveting equipment cannot analyze the quality of the performance of the joint; if install punch and die on tensile testing machine from dashing, then need the laboratory glassware for laboratory glassware to fix a position through manual control, the tensile style that this kind of mode was made, the size differs, and the performance is undulant great.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a simple structure, convenient and fast, low-priced economy, riveting dependable performance and but the good and bad self-piercing riveting tools of analytical joint performance and device.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a self-piercing riveting tool comprises an upper die base, a male die, a lower die base, a female die and a sample mounting base; the upper die base is used for being fixedly connected with an upper stretching mechanism of a stretching testing machine, the male die is installed at the lower end of the upper die base, and the lower end of the male die is used for fixing a self-punching rivet; the lower die base is used for being fixedly connected with a lower stretching mechanism of a stretching testing machine, the sample mounting base is mounted at the upper end of the lower die base, and the female die is provided with a containing hole matched with the self-piercing rivet; the sample mounting seat is provided with a mounting hole, and the female die is arranged in the mounting hole in a penetrating manner and fixedly connected with the bottom wall of the mounting hole; the upper end face of the sample mounting seat is used for placing a self-piercing riveting sample.

And the upper die base is driven by the tensile testing machine to move downwards at a constant speed until the self-piercing rivet pierces the upper laminate of the self-piercing riveting sample and gradually penetrates through the lower laminate, the lower end of the self-piercing rivet penetrates through the lower laminate and then extends into the accommodating hole of the female die, and the nail legs are expanded outwards under the action of the female die and are splayed to form mechanical interlocking with the upper laminate and the lower laminate of the self-piercing riveting sample.

The tool can be used for manufacturing patterns connected in various ways, the consistency of the size can be ensured, and powerful guarantee is provided for subsequent sample tensile test analysis; researchers can analyze the quality of the performance of the joint according to the force-displacement curve without purchasing other auxiliary devices, thereby saving financial resources and material resources.

As a further improvement of the above technical solution:

the central axes of the self-piercing rivet and the containing hole and the stretching axis of the tensile testing machine are positioned on the same straight line; the straight line passes through the riveting center of the self-piercing riveting sample.

And the sample mounting seat and the female die are integrally formed.

And the upper end surface of the sample mounting seat is provided with a clamping groove for fixing the self-piercing riveting sample.

The clamping groove is a cross clamping groove matched with the cross self-piercing riveting sample.

The male die is made of a magnetic material or the lower surface of the male die is provided with a magnetic material layer, and the self-piercing rivet can be adsorbed on the lower surface of the male die.

And the lower end of the male die is provided with a rubber ring for controlling the stretching and blank holding force.

The upper die base is fixedly connected with an upper stretching mechanism of the tensile testing machine through bolts, and the lower die base is fixedly connected with a lower stretching mechanism of the tensile testing machine through bolts.

As a general inventive concept, the utility model also provides a self-piercing riveting set, including tensile testing machine and the above-mentioned self-piercing riveting frock, the upper die base links firmly with tensile testing machine's last tensile mechanism, the lower die base links firmly with tensile testing machine's lower tensile mechanism.

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

1. the tool can realize riveting of the self-piercing riveting sample with high reliability of riveting performance by means of the tensile testing machine, can analyze the quality of joint performance according to a force-displacement curve, can control the quality of a joint by adjusting the tensile speed, and is higher in quality compared with the traditional method for controlling by adjusting oil pressure.

2. This frock simple to operate need not other auxiliary device, need not to purchase professional equipment, saves financial resources, physics. The male die and the female die can be assembled and disassembled at any time, a proper male die and female die combination can be selected according to different plate thickness working condition combinations, and the design of the cross clamping groove sample mounting seat can realize the sample preparation of T-shaped, cross-shaped, lap joint, H-shaped and other complex connectors.

Drawings

Fig. 1 is a schematic perspective view of a self-piercing riveting tool according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a self-piercing riveting tool according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a cross-shaped self-piercing riveting sample.

Fig. 4 is a schematic structural diagram of an H-shaped self-piercing riveting sample.

Fig. 5 is a schematic structural diagram of a lap-type self-piercing rivet sample.

Fig. 6 is a schematic structural diagram of a T-shaped self-piercing riveting sample.

Illustration of the drawings: 1. an upper die holder; 2. a male die; 3. a lower die holder; 4. a female die; 41. a housing hole; 5. a sample mounting base; 51. mounting holes; 52. a card slot; 6. self-piercing rivets; 7. a bolt; 8. a rubber ring; 9. and (6) self-piercing riveting of the sample.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example (b):

as shown in fig. 1 and 2, the self-piercing riveting tool of the present embodiment includes an upper die holder 1, a male die 2, a lower die holder 3, a female die 4, and a sample mounting seat 5.

The upper die holder 1 is fixedly connected with an upper stretching mechanism of a stretching testing machine through a bolt 7, the male die 2 is installed at the geometric center of the lower end face of the upper die holder 1, and the lower end of the male die 2 is used for fixing a self-piercing rivet 6. The lower end of the male die 2 is provided with a magnetic material layer, and the self-piercing rivet 6 can be adsorbed on the lower surface of the male die 2. And the lower end of the male die 2 is provided with a rubber ring for controlling the stretching and blank holding force.

The lower die holder 3 is fixedly connected with a lower stretching mechanism of the stretching testing machine through a bolt 7, the sample mounting seat 5 is mounted at the geometric center of the upper end face of the lower die holder 3, and the sample mounting seat 5 and the female die 4 are integrally formed. The female die 4 is provided with a containing hole 41 matched with the self-piercing rivet 6. The geometric center of the upper end face of the sample mounting seat 5 is provided with a mounting hole 51, and the female die 4 penetrates through the mounting hole 51 and is fixedly connected with the bottom wall of the mounting hole 51.

The central axes of the self-piercing rivet 6 and the containing hole 41 and the stretching axis of the stretching testing machine are positioned on the same straight line; and the straight line passes through the riveting center of the self-piercing riveting test piece 9.

The upper end face of the sample mounting seat 5 is provided with a clamping groove 52 for fixing the self-piercing riveting sample. In this embodiment, the clamping groove 52 is a cross clamping groove matched with the cross self-piercing riveting sample. By means of the cross clamping groove, the cross, H, lap joint and T-shaped self-piercing riveting samples 9 shown in figures 3-6 can be clamped and fixed in the cross clamping groove, and the next riveting work is convenient to carry out.

1) The four bolts M16 of the upper die holder 1 connect the upper part of the tooling with the upper stretching mechanism of the stretcher, and the four bolts M16 of the lower die holder 3 connect the lower part of the tooling with the lower stretching mechanism of the stretcher. The center of the upper die holder 1 and the center of the lower die holder 3 are strictly aligned with the stretching center of the stretcher, so that the center of the male die 2 and the center of the female die 3 are always on the same central axis in the riveting process.

2) The male die 2 is located in the center of the upper die base 1 and is in threaded connection with the upper die base 1, the male die 2 is magnetic, a steel SPR rivet is attracted to the lower end of the male die 2, and the rubber ring 8 at the lower end of the male die 2 plays a role in controlling blank pressing force.

3) The sample mounting seat 5 is positioned at the center of the lower die holder 3 and is in threaded connection with the lower die holder 3. The female die 4 is positioned in the center of the sample mounting seat 5, and the upper surface of the female die 4 is on the same horizontal plane with the bottom wall of the clamping groove 52. The clamping groove 52 can be used for placing rectangular steel sheets or aluminum sheets, and can be riveted with cross and lapped sample joints.

4) The cross clamping groove has certain depth and width, and the H-shaped folding edge and the T-shaped folding edge can be clamped in the cross clamping groove and can be used for riveting an H-shaped joint and a T-shaped joint.

5) The device has simple form and high rigidity, and avoids the problems of sliding, eccentricity and the like of the rivet in the riveting process.

6) In the riveting process, the center of the upper die holder 1, the center of the lower die holder 3, the center of the male die 2, the center of the female die 4 and the riveting point are all on the same vertical line. Setting a proper pressing speed, starting a tensile testing machine, moving an upper die holder 1 downwards, pressing a self-tapping rivet 6 into the two-layer plate under the combined action of a male die 2 and a female die 4, recording a force-displacement curve, stopping the tensile testing machine when observing that the output force is close to 5kN in order to prevent damage to the female die of SPR, storing the force-displacement curve, and carrying out subsequent analysis.

The utility model discloses an application method does:

1) the male die 2 is arranged in the upper die holder 1, and the sample mounting seat 5 is arranged on the lower die holder 3;

2) the male die 2 is provided with a magnetic substance, and a steel self-tapping rivet 6 is tightly attached to the male die 2;

3) placing a test piece of the self-piercing riveting sample in a clamping groove 52 of the female die 4, and enabling the riveting point to coincide with the center of the female die 4;

4) the upper part of the universal mechanical tensile testing machine is connected with the upper tool die holder 1 through a bolt 7, and the lower tool die holder 3 is connected with the lower part of the tensile testing machine through a bolt 7.

5) And setting a proper pressing speed, starting the tensile testing machine, recording a force-displacement curve, and stopping pressing when the force reaches 5kN in order to prevent the concave die from being damaged.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. A self-piercing riveting tool is characterized by comprising an upper die holder (1), a male die (2), a lower die holder (3), a female die (4) and a sample mounting seat (5); the upper die holder (1) is fixedly connected with an upper stretching mechanism of a stretching testing machine, the male die (2) is installed at the lower end of the upper die holder (1), and the lower end of the male die (2) is used for fixing a self-piercing rivet (6); the lower die holder (3) is fixedly connected with a lower stretching mechanism of a stretching testing machine, the sample mounting seat (5) is mounted at the upper end of the lower die holder (3), and the female die (4) is provided with a containing hole (41) matched with the self-piercing rivet (6); a mounting hole (51) is formed in the sample mounting seat (5), and the female die (4) is arranged in the mounting hole (51) in a penetrating manner and fixedly connected with the bottom wall of the mounting hole (51); the upper end face of the sample mounting seat (5) is used for placing a self-piercing riveting sample.

2. The self-piercing riveting tool according to claim 1, characterized in that the central axes of the self-piercing rivet (6) and the containing hole (41), and the tensile axis of the tensile testing machine are located on the same straight line; the straight line passes through the riveting center of the self-piercing riveting sample.

3. The self-piercing riveting tool according to claim 1, characterized in that the sample mounting seat (5) and the female die (4) are integrally formed.

4. The self-piercing riveting tool according to claim 1, characterized in that the upper end face of the sample mounting seat (5) is provided with a clamping groove (52) for fixing the self-piercing riveting sample.

5. The self-piercing riveting tool according to claim 4, characterized in that the clamping groove (52) is a cross clamping groove matched with a cross self-piercing riveting test piece.

6. Self-piercing riveting tool according to any one of claims 1 to 4, characterized in that the punch (2) is made of magnetic material or the lower surface of the punch (2) is provided with a layer of magnetic material, the self-piercing rivet (6) being attachable to the lower surface of the punch (2).

7. Self-piercing riveting tool according to any one of claims 1-4, characterized in that the lower end of the punch (2) is provided with a rubber ring (8) for controlling the draw blank force.

8. The self-piercing riveting tool according to any one of claims 1-4, characterized in that the upper die holder (1) is fixedly connected with an upper stretching mechanism of a tensile testing machine through a bolt (7), and the lower die holder (3) is fixedly connected with a lower stretching mechanism of the tensile testing machine through a bolt (7).

9. A self-piercing riveting device is characterized by comprising a tensile testing machine and the self-piercing riveting tool set according to any one of claims 1-8, wherein the upper die holder (1) is fixedly connected with an upper stretching mechanism of the tensile testing machine, and the lower die holder (3) is fixedly connected with a lower stretching mechanism of the tensile testing machine.