TWM581947U - Resistance riveting device - Google Patents

Abstract

A resistor riveting device includes an upper electrode member, a lower electrode member and a rivet; the upper electrode member includes an upper body and a protruding portion, and the protruding portion is disposed at one end edge of the upper body for contacting a first a metal piece; the lower electrode member includes a lower body and a recessed portion formed at one end edge of the lower body; the rivet is disposed in the recessed portion, and the rivet is configured to contact a second metal piece, And engaging the first and second metal sheets, the rivet includes a base and a cone, wherein the cone extends from the base, and a diameter of the bottom of the cone and the protrusion One end of the outlet has the same length.

Description

Resistance riveting device

This creation relates to a riveting device, and more particularly to a resistance riveting device.

Resistance Spot Welding and Riveting are joint technologies widely used in the industry. Resistance spot welding involves heating and physical changes of the object to be welded, and riveting is a mechanical force bonding method.

However, the two joint joining techniques of resistance spot welding and riveting have their respective disadvantages when they are joined by steel sheets and aluminum sheets. In the case of resistance spot welding technology, since steel and aluminum cannot be fused together, resistance spot welding can only produce molten weld nuggets for steel sheets and aluminum sheets, but weld nuggets cannot be joined to each other, steel sheets and aluminum sheets. There are still many intermetallic compounds such as FeAl, FeAl ₂ , Fe ₂ Al ₃ , FeAl _{3 ,} etc. These intermetallic compounds have hard and brittle characteristics, resulting in insufficient formation of weld nuggets formed by spot welding between steel sheets and aluminum sheets. The strength of the support, thus affecting the tightness of the steel sheet and the aluminum sheet joint. In addition, there are practical cases in which steel sheets and aluminum sheets are joined by riveting (self-piercing riveting) technology, but the riveting technology is more susceptible to the influence of the type and strength of the steel sheet, for example, the steel sheet is inferior in strength. High advanced high-strength steel (AHSS), the rivet used in the riveting technology needs special design and material, and the pressure required for riveting is high, so the level of equipment requirements is increased, and the cost is greatly increased.

Therefore, it is necessary to provide an improved resistance riveting device to solve the problems of the above conventional techniques.

The main purpose of the present invention is to provide a resistance riveting device for energizing the upper electrode member and the lower electrode member, so that the tapered body of the rivet passes through the first metal piece which is softened by heat, and is further fused with the second metal piece to avoid fusion. The joint of the two metal sheets is too hard and brittle, thereby improving the joint strength and tightness of the two metal sheets.

In order to achieve the above object, the present invention provides a resistance riveting device for joining a first metal piece and a second metal piece of heterogeneity, the resistance riveting device comprising an upper electrode member, a lower electrode member and a rivet; The electrode member includes an upper body and a protruding portion, the protruding portion is disposed at an edge of the upper body for contacting the first metal piece; the lower electrode member comprises a lower body and a concave portion, the concave portion is formed The rivet is disposed in the recessed portion, and the rivet is configured to contact the second metal piece and is configured to engage the first and second metal pieces, the rivet includes a base and a a tapered body, wherein the tapered body extends from the base, and a diameter of a bottom portion of the tapered body is the same as a diameter of one end portion of the protruding portion.

In one embodiment of the present invention, an angle of a section of the cone is 55 to 60 degrees.

In an embodiment of the present invention, the two sides of the angle of the cross section of the tapered body are equal in length.

In an embodiment of the present invention, a thickness of the base is the same as a depth of the recess.

In an embodiment of the present invention, the end of the projection is opposite the tapered body.

In an embodiment of the present invention, the length of the end of the projection is smaller than the length of the recess.

In one embodiment of the present invention, a ratio of a thickness of the pedestal to a thickness of the cone is 1:2 to 1:3.

In one embodiment of the present invention, the thickness of the tapered body is greater than a thickness of the second metal sheet by 1 to 3 mm.

In an embodiment of the present invention, the resistance riveting device further includes a gasket having a fixing groove for receiving the lower electrode member.

In an embodiment of the present invention, the first metal piece abutting the protruding portion of the upper electrode member is a steel piece, and the second metal piece abutting the rivet is an aluminum piece.

As described above, by energizing the upper electrode member and the lower electrode member, the tapered body of the rivet passes through the heat-softened aluminum sheet, and is further fused with the steel sheet to prevent the joint between the steel sheet and the aluminum sheet from being too hard. In the case of brittleness, the joint strength and tightness of the steel sheet and the aluminum sheet are improved, and the installation cost of the equipment used is also reduced. Further, the diameter of the bottom of the tapered body is the same as the diameter of the end of the protruding portion of the upper electrode member, and the length of the end portion of the protruding portion matches the diameter of the bottom portion of the tapered body. Therefore, the protruding portion is less likely to penetrate the aluminum sheet by heating, and a tip end of the tapered body of the rivet can facilitate the penetration of the aluminum sheet and the expansion of the steel sheet into a cylinder, and The molten weld nugget can be expanded and formed to achieve a tight joint effect.

101‧‧‧First sheet metal

102‧‧‧Second metal sheet

2‧‧‧Upper electrode parts

21‧‧‧Ontology

22‧‧‧Protruding

3‧‧‧ lower electrode parts

31‧‧‧ Lower ontology

32‧‧‧Depression

4‧‧‧ Rivets

41‧‧‧Base

42‧‧‧Cone

5‧‧‧shims

51‧‧‧fixed slot

R1‧‧‧ path length

R2‧‧‧ path length

R3‧‧‧ path length

L1‧‧‧ thickness

L2‧‧‧ Depth

L3‧‧‧ thickness

A‧‧‧ angle

B‧‧‧weld core

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevational view of a preferred embodiment of a resistor riveting apparatus according to the present invention.

Fig. 2 is a perspective cross-sectional view showing a preferred embodiment of the electric resistance riveting device according to the present invention.

Fig. 3 is a side elevational view showing the riveting according to a preferred embodiment of the inventive resistance riveting device.

Fig. 4 is a perspective cross-sectional view showing the riveting according to a preferred embodiment of the present electric resistance riveting device.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail below. Furthermore, the directional terms mentioned in this creation, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, vertical, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is used to describe and understand the creation, and is not intended to limit the creation.

Referring to FIGS. 1 and 2, in a preferred embodiment of the resistor riveting device of the present invention, the resistor riveting device is configured to engage a first metal piece 101 and a second metal piece 102 of a heterogeneous shape, and The resistance riveting device comprises an upper electrode member 2, a lower electrode member 3 and a rivet 4. This work will detail the detailed construction, assembly relationship and operation principle of each component.

With reference to the first and second embodiments, the upper electrode member 2 includes an upper body 21 and a protruding portion 22, and the protruding portion 22 is disposed at one end edge of the upper body 21. The protruding portion 22 is configured to be used for The first metal piece 101 is contacted. In the embodiment, the first metal piece 101 abutting the protruding portion 22 of the upper electrode member 2 is a steel piece, and the second metal piece 102 abutting the rivet 4 is an aluminum piece.

Referring to FIGS. 1 and 2, the lower electrode member 3 includes a lower body 31 and a recess 32, wherein the recess 32 is formed at one end edge of the lower body 31. In the present embodiment, a diameter R1 of the end portion of the protruding portion 22 is smaller than a diameter R2 of the recess portion 32.

Referring to FIGS. 1 and 2, the rivet 4 is disposed in the recess 32 of the lower electrode member 3, and the rivet 4 is configured to contact the second metal piece 102 and is used to join the first metal piece 101. And a second metal piece 102, the rivet 4 includes a base 41 and a tapered body 42. The tapered body 42 extends from the base 41, and a diameter R3 of a bottom portion of the tapered body 42 is The end portion of the projection portion 22 of the upper electrode member 2 has the same diameter R1. In the present embodiment, an angle A of a cross section of the tapered body 42 is 55 to 60 degrees, and the two sides of the angle A of the cross section of the tapered body 42 are equal in length. In addition, a thickness L1 of the base 41 of the rivet 4 is the same as a depth L2 of the recessed portion 32 of the lower electrode member 3, and an end portion of the protruding portion 22 of the upper electrode member 2 is opposite to the tapered body 42. .

Continuing with reference to Figures 1 and 2, the resistance riveting device further includes a gasket 5 having a fixing groove 51 for receiving the lower electrode member 3. In this embodiment, the ratio of the thickness L1 of the base 41 to a thickness L3 of the tapered body 42 is 1:2 to 1:3, and the thickness L3 of the tapered body 42 is larger than the second metal piece. A thickness of 102 is 1 to 3 mm.

According to the above structure, as shown in FIG. 1, the rivet 4 is first placed and fixed in the recessed portion 32 of the lower electrode member 3, and the heterogeneous first metal piece 101 and the second metal piece 102 are placed one on top of the other. Between the lower electrode member 3 and the upper electrode member 2, as shown in FIGS. 3 and 4, the protruding portion 22 of the upper electrode member 2 is abutted against the first metal piece 101, and the rivet 4 is The tapered body 42 abuts against the second metal piece 102, and energizes the upper electrode member 2 and the lower electrode member 3, so that the tapered body 42 of the rivet 4 is melted to form a weld core B to engage the first metal piece. 101 and the second metal piece 102.

As described above, by energizing the upper electrode member 2 and the lower electrode member 3, the tapered body 42 of the rivet 4 is passed through the heat-softened aluminum sheet, and is further fused with the steel sheet to avoid the steel sheet and the aluminum sheet. The joint is too hard and brittle, thereby improving the joint strength and tightness of the steel sheet and the aluminum sheet, and also reducing the cost of the equipment used. In addition, the diameter of the bottom of the tapered body 42 is R3 The same as the radial length R1 of the end portion of the convex portion 22 of the upper electrode member 2, the radial length R1 of the end portion of the convex portion 22 matches the diameter R3 of the bottom portion of the tapered body 42, so that the convex portion The outlet portion 22 is less likely to penetrate the aluminum sheet by heating. In addition, a tip end of the tapered body 42 of the rivet 4 of the present electric resistance riveting device is expanded after the welding (conical variable cylinder type), and the steel sheet can be surely And the aluminum sheet achieves the effect of tight joint, and the molten weld nugget B can be completely formed and has better welding strength.

Although the present invention has been disclosed in its preferred embodiments, it is not intended to limit the present invention, and anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. The scope of protection is subject to the definition of the scope of the patent application.

Claims (10)

A resistance riveting device for joining a first metal piece and a second metal piece of heterogeneity, the resistance riveting device comprising: an upper electrode member, comprising an upper body and a protrusion, wherein the protrusion is disposed on the An end edge of the upper body is configured to contact the first metal piece; the lower electrode member includes a lower body and a recessed portion formed on one end edge of the lower body; and a rivet disposed in the recessed portion The rivet is configured to contact the second metal sheet and to engage the first and second metal sheets, the rivet includes a base and a cone, wherein the cone extends from the base, and the a diameter of a bottom portion of the tapered body is the same as a diameter of one end portion of the protruding portion; a tip end of the tapered body of the rivet is configured to melt and expand into a cylinder to form a weld nugget to be tight The first metal piece and the second metal piece are joined. The resistance riveting device of claim 1, wherein an angle of a section of the cone is 55 to 60 degrees. The electric resistance riveting device according to claim 2, wherein the two sides of the angle of the cross section of the tapered body are equal in length. The resistance riveting device of claim 1, wherein a thickness of the base is the same as a depth of the recess. The electric resistance riveting device of claim 1, wherein an end of the projection is opposite to the tapered body. The electric resistance riveting device according to claim 1, wherein an end of the protruding portion has a diameter smaller than a diameter of the recess. The resistance riveting device of claim 1, wherein a ratio of a thickness of the base to a thickness of the cone is 1:2 to 1:3. The resistance riveting device of claim 1, wherein a thickness of the tapered body is greater than a thickness of the second metal piece by 1 to 3 mm. The electric resistance riveting device of claim 1, wherein the electric resistance riveting device further comprises a gasket, the gasket having a fixing groove for receiving the lower electrode member. The electric resistance riveting device of claim 1, wherein the first metal piece abutting the protruding portion of the upper electrode member is a steel piece, and the second metal piece abutting the rivet is an aluminum piece. .