CN105414437B - A kind of precompressed hole using soft riveting post and the compound sheet material connection method of riveting - Google Patents

Abstract

A kind of precompressed hole using soft riveting post and the compound sheet material connection method of riveting,Tie point is first produced on upper plate and lower plate using precompressed hole,Mechanically deform is generated between upper plate and lower plate,It is consequently formed embedded,So that upper plate and lower plate link together,The tie point formed after upper plate is connected with lower plate by precompressed hole is tipped upside down on riveting post,Riveting post is set to be placed in the pit on upper plate,By upper plate,Lower plate and riveting post are placed between mold and lower mould,Pass through riveting technique,Mold moves downward,Upper plate is extruded under the cooperation of lower mould,Lower plate and riveting post,It is plastically deformed riveting post,It is embedded into upper plate,And oppress upper plate and be further embedded at tie point in lower plate,Increase bonding strength,The raised height reduction under the pressure effect of mold in lower plate,The present invention has bonding strength high,The advantages of height of projection is low.

Description

A composite plate connection method using soft riveting posts with pre-pressed holes and riveting

technical field

The invention belongs to the technical field of plate connection, and in particular relates to a plate connection method using soft riveting posts combined with pre-pressed holes and riveting.

Background technique

In recent years, the connection problems of plates of the same material, dissimilar materials, same thickness and different thickness have received extensive attention. The connection technology of the plates connected by rivets is poor, and the rivets will damage the surface of the plates, seriously affecting the use of the plates. In addition, because the rivets and the plates are of different materials, electrochemical corrosion is prone to occur and the connection points will become loose.

In addition, there is a technology for connecting plates called mechanical deformation pressure connection process. The mechanical deformation pressure connection process uses a special punch and die to stamp the connecting plates, and uses the plastic deformation ability of the metal to achieve the purpose of connection through the embedding between the plates. . The mechanical deformation pressure connection process is not only economical, energy-saving, and environmentally friendly, but also very suitable for the connection of heterogeneous and special-shaped materials with coatings or paints on the surface. The static strength of single-point mechanical deformation pressure connection is 70% of that of spot welding, while the double-point connection can be equal to spot welding, and its dynamic strength is higher than that of spot welding, and its service life is longer than that of spot welding. However, mechanical deformation pressure connections also have fatal disadvantages. Since the purpose of connection is achieved by using the embedding between the plates, there must be a higher protrusion on one side of the plates, and a corresponding recess on the other side. The traditional mechanical deformation pressure connection process cannot be used in occasions that require relative sliding of planes due to the protrusions, which limits its wide application. In addition, since there are pits and protrusions on both sides, it seriously affects its aesthetics, so that it cannot be used in occasions with high quality requirements on the appearance.

Contents of the invention

In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a method for connecting plates using pre-pressed holes and riveting of soft rivets, which can significantly reduce the height of the connection point and increase the strength of the connection point.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A board connection method using soft rivet post pre-pressed hole and riveting compound, comprising the following steps:

In the first step, a connection point is created on the upper plate 1 and the lower plate 2 by using pre-pressed holes, and mechanical deformation occurs between the upper plate 1 and the lower plate 2, thereby forming an inlay, so that the upper plate 1 and the lower plate 2 connected together, there is a dimple on the upper plate 1 and a protrusion on the lower plate 2,

In the second step, the connection point formed by connecting the upper plate 1 and the lower plate 2 through the pre-pressing hole is buckled upside down on the rivet post 5, so that the rivet post 5 is placed in the pit on the upper plate 1, and the upper plate 1, the lower plate The plate 2 and the rivet column 5 are placed between the upper mold 3 and the lower mold 4. Through the riveting process, the upper mold 3 moves downward, and the upper plate 1, the lower plate 2 and the rivet column 5 are squeezed under the cooperation of the lower mold 4. Make the rivet post 5 plastically deform, embed it into the upper plate 1, and press the upper plate 1 to further embed into the lower plate 2 at the connection point, so as to increase the connection strength, and the pressure of the protrusion on the lower plate 2 on the upper mold 3 The height is reduced under the action.

In the riveting process, the material of the rivet post 5 flows outwards around the pits on its upper and lower end faces, and the flow of material will cause the rivet post 5 to be embedded in the pits on the upper plate 1, and at the same time make the upper plate 1 The plate 1 is further embedded in the lower plate 2 at the connection points.

The shape of the rivet post 5 is cylindrical, the upper plane of the cylinder is provided with an upper pit, and the lower plane of the cylinder is provided with a lower pit, and its parameters include the diameter d ₃ of the rivet post, the height h of the rivet post, and the diameter d ₂ of the upper pit , the diameter of the lower pit d ₁ , the depth of the upper pit l ₂ , the depth of the lower pit l ₁ , the taper angle of the upper pit α ₂ , the taper angle of the lower pit α ₁ and the fillet R of the rivet column, through different combinations of the above parameters Can produce different connection effects.

The materials of the upper plate 1 and the lower plate 2 are the same.

The material of the rivet post 5 is the same as that of the upper plate 1 .

The material of the rivet post 5 is aluminum alloy or copper alloy.

The present invention has the following advantages:

(1) Traditional rivets need to be quenched, and the shape is a cup-shaped piece with sharp teeth, which is expensive. However, the soft riveting column used in the present invention has a simple manufacturing process and low cost.

(2) The traditional toothed rivets will damage the connected plates, which increases the difficulty of anti-corrosion treatment and causes the plates to be easily corroded at the joints. However, the rivet stud adopted in the present invention completely utilizes plastic deformation to connect the plates together without damaging the plates.

(3) The rivet stud material of the present invention is the same aluminum alloy, copper alloy and other materials with good plasticity as the sheet material, and the material is relatively soft, suitable for plastic processing, and can be produced in batches.

(4) The rivet column and the connected plate are made of the same material, and there will be no electrochemical reaction between the rivet column and the plate after riveting, so there is no looseness after the rivet column is riveted.

(5) After the riveting post is used for riveting, the height of the protrusion of the connection point can be effectively reduced, the appearance of the connection point can be improved, and the application is more extensive.

(6) This method can effectively increase the strength of the connection point.

Description of drawings

Fig. 1 is a schematic diagram of the connection points produced by the pre-pressed holes of the present invention.

Fig. 2 is a schematic diagram of the present invention before riveting.

Fig. 3 is a schematic diagram of the present invention after riveting.

Fig. 4 is the material flow of the rivet column during the riveting process of the present invention.

Fig. 5 is a cross-sectional view of a rivet column used in the present invention.

Fig. 6 is a cross-sectional picture of plates connected by the method of the present invention.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings.

A board connection method using soft rivet post pre-pressed hole and riveting compound, comprising the following steps:

The first step, referring to Figure 1, uses pre-pressed holes to create connection points on the upper plate 1 and the lower plate 2, and mechanical deformation occurs between the upper plate 1 and the lower plate 2, thereby forming an inlay, so that the upper plate 1 Connected with the lower plate 2, there is a pit on the upper plate 1, and a protrusion on the lower plate 2, which affects its use in some occasions that require surface quality.

In the second step, referring to Figure 2 and Figure 3, the connection point formed by connecting the upper plate 1 and the lower plate 2 through the pre-pressing hole is buckled upside down on the rivet post 5, so that the rivet post 5 is placed in the pit on the upper plate 1 , the upper plate 1, the lower plate 2 and the rivet post 5 are placed between the upper mold 3 and the lower mold 4, through the riveting process, the upper mold 3 moves downward, and the upper plate 1 and the lower plate are squeezed under the cooperation of the lower mold 4 The plate 2 and the rivet post 5 make the rivet post 5 plastically deform, embed it into the upper plate 1, and press the upper plate 1 to further embed into the lower plate 2 at the connection point, so as to increase the connection strength, and the protrusion on the lower plate 2 The height is reduced under the pressure of the upper mold 3, the materials of the upper plate 1 and the lower plate 2 are the same, the material of the rivet post 5 is the same as that of the upper plate 1, and the material of the rivet post 5 is aluminum alloy.

Referring to FIG. 4 , in the riveting process, the material of the rivet post 5 flows outwards around the pits on its upper and lower end faces, and the flow of material will cause the rivet post 5 to embed into the pits on the upper plate 1 , And at the same time, the upper plate 1 is further embedded into the lower plate 2 at the connection point.

Referring to Fig. 5, the shape of the rivet post 5 is cylindrical, the upper plane of the cylinder is provided with an upper pit, and the lower plane of the cylinder is provided with a lower pit, and its parameters include the diameter d ₃ of the rivet post, the height h of the rivet post, the upper concave Pit diameter d ₂ , lower pit diameter d ₁ , upper pit depth l ₂ , lower pit depth l ₁ , upper pit taper angle α ₂ , lower pit taper angle α ₁ and rivet post fillet R, through the above Different combinations of parameters can produce different connection effects.

Referring to Fig. 6, the present invention has been successfully applied to connecting plates, and the effect is very good.

Claims (4)

1. a kind of precompressed hole using soft riveting post and the compound sheet material connection method of riveting, it is characterised in that including following step Suddenly：

The first step, tie point is produced on upper plate (1) and lower plate (2) using precompressed hole, produced between upper plate (1) and lower plate (2) Mechanically deform, is consequently formed embedded, so that upper plate (1) and lower plate (2) link together, there is one on upper plate (1) Pit, a projection in lower plate (2) be present,

Second step, the tie point formed after upper plate (1) is connected with lower plate (2) by precompressed hole are tipped upside down on riveting post (5), make riveting Post (5) is placed in the pit on upper plate (1), and upper plate (1), lower plate (2) and riveting post (5) are placed in into mold (3) and lower mould (4) Between, by riveting technique, mold (3) moves downward, under the cooperation of lower mould (4) extrude upper plate (1), lower plate (2) and Riveting post (5), riveting post (5) is plastically deformed, be embedded into upper plate (1), and it is further embedding at tie point to oppress upper plate (1) Enter into lower plate (2), increase bonding strength, the raised height reduction under the pressure effect of mold (3) in lower plate (2)；

In riveting technique, the material of riveting post (5) outwards flows along around the pit on its upper surface and lower surface, the stream of material In the dynamic pit that riveting post (5) can be made to be embedded on upper plate (1), and make simultaneously under upper plate (1) is further embedded at tie point In plate (2)；

Being shaped as described riveting post (5) is cylindric, and plane is provided with upper pit on cylinder, and cylinder lower plane is provided with lower pit, its Parameter includes riveting column diameter d₃, riveting pillar height degree h, upper pit diameter d₂, lower pit diameter d₁, upper pit depth l₂, lower pit depth l₁, upper pit cone angle₂, lower pit cone angle₁With riveting post fillet R, different connections can be produced by the different combination of above-mentioned parameter Effect.

2. a kind of precompressed hole using soft riveting post according to claim 1 and the compound sheet material connection method of riveting, its It is characterised by：Described upper plate (1), the material of lower plate (2) are identical.

3. a kind of precompressed hole using soft riveting post according to claim 1 and the compound sheet material connection method of riveting, its It is characterised by：The material of described riveting post (5) is identical with the material of upper plate (1).

4. a kind of precompressed hole using soft riveting post according to claim 1 and the compound sheet material connection method of riveting, its It is characterised by：The material of described riveting post (5) is aluminium alloy or copper alloy.