JPS63192524A - Joining apparatus for metal plate - Google Patents

Abstract

PURPOSE:To minimize working man-hour and to reduce a pitch between joinings by compressing and moving a material to the constriction part of a punch by cooperation with a compress working part of the punch together with the projecting part for preventing the material outflow of a die. CONSTITUTION:Two sheets of metal plates 6, 7 are mounted on the die 3 and clamped by a pad 2 and the die 3 to prevent the outflow of the material of the metal plate 7 by the inner circumferential edge of the projecting part 3b. Then, descending the punch 1 to push the rolling part 1c in the metal plates 6, 7 into the die hole to perform the rolling. Further, descending the punch 1 to thrust the periphery of the compress working part 1a having a rake angle thetainto the metal plate 6, the material is flowed in the constriction part 1b of the undercut of the punch 1, while compressing the metallic plates 6, 7 together with the projecting part 3b. Then, when the bottom of an ejecter punch 4 thrusts a packing plate 5, the compress working is started by a rolling part 1c and the upper end of the punch 4, the material is moved along the spherical surface toward the peripheral direction of the die hole to form the constriction between materials, the metal plates 6, 7 are joined by cauking.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a joining device for joining metal plates by overlapping them and compressing them using a punch and a die.

<Prior Art> Published Patent Publication No. 7026 of 1988 discloses a joining method, a joining device, and a joining structure for joining two thin metal plates placed one on top of the other.

As shown in FIGS. 3 and 4, this device includes an anvil member 10
and a plurality of support members 12 in the vicinity of the anvil member 10 are provided in the center, each of the support members 12 protruding from the machined surface 16 of the anvil member 10, and the ends of the protruding support members are cut. - A support member 14 is provided, and this support member 12
The machined surface of the anvil member 10 deforms the female die which is attached so as to be separated from the anvil member 10 when bent, and the thin metal 1i18.20 placed between the female die and the female die. 16, and has a machined surface 24 opposite to the machined surface 16 of the anvil member 10, and this machined surface 24 is narrower than the cutting interval of the support member 12 and the installation interval of the nozzles 14. This is a joining device equipped with a male die 22 having a set structure. In the figure, 30 is a thin portion after joining, 32 is a similarly deformed portion, and 34 is an edge of the cut.

<Problems to be Solved by the Invention> The above device has a plurality of support members 1 close to the anvil member 10.
2 must be made flexible so as to be spaced apart from the anvil member 10, which poses a problem in that the structure is complicated, requires a large number of processing steps, and is expensive. 'Also, it requires a space for the support part and the material 12 to move, which has the disadvantage that it is impossible to join closely together or to join near the flange.

Means for Solving the Problems〉 This is a joining device that performs compression molding and crimping to join stacked metal plates with a punch 1 and a die 3, in which a compression processed portion 1a having a rake angle θ is provided on the periphery and an underside is formed. Is the cut X tight? This metal plate welding device is provided with a rim 1 having a rolling part IC provided in the center, and a die 3 having a protrusion 3b for preventing material outflow on the periphery.

Function> The material is compressed and moved to the constriction LB part of the punch 1 by the cooperative action of the compression processing part 1a of the punch 1 and the protrusion part 3b for preventing material outflow of the die 3, and the material is caulked and joined, so it is a movable type. You can roll the dice to 3.

, <Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 (al, (bl) is a sectional view of the main part of the upper and lower molds of the caulking joint type according to the present invention, and 1 in the figure is provided at the periphery of the compressed part 1ai having a rake angle θ, and the constriction of the undercut x. The punch has a rolled part 1c having a diameter 1b projected from the center, and a pad 2 which guides the vertical sliding of the punch 1 and clamps the metal plate in cooperation with the die 3.

The tip end surface of the rolled portion 1c of the punch 1 is preferably a loose spherical surface, and the corner portion is preferably provided with an R for allowing the material to flow into the constriction 1b.

The die 8 is used to clamp the metal plate in cooperation with the pad 2, and also has a die hole a pushed in by the rolling part 1c when the metal plate is compressed in cooperation with the compression process ffB1a of the punch 1. An annular protrusion 3b with a trapezoidal cross section is provided to prevent the material inside from flowing outward. Reference numeral 4 designates an ejector punch disposed within the die 3 so as to be vertically slidable and biased upward, and the upper end surface of the ejector punch has a loose spherical surface.

This ejector bunch 4 is pushed into the die hole a and descends by being pushed by the material, and bottoms out against the backing plate 5 just before the completion of compression molding, contributing to the compression molding and also having the effect of ejecting the caulked metal plate. have

Next, the mechanism of caulking and joining by the joining apparatus having the above structure will be explained based on FIG. 2 (c).

First, place the two metal plates 6.7 on the die 3, and
As shown in Figure (al), the pad 2 and the die 3 are clamped to prevent the material of the metal plate 7 from flowing outward at the inner peripheral edge of the protrusion 3b.

Then, when the punch 1 is lowered, the rolling section IC pushes the metal plate 6.7 into the direction of the die and rolls it.

When the punch 1 is further lowered, the compressed portion 1a is compressed into the metal plate 6.
The material flows into the constriction 1b of the punch 1 while compressing the metal plate 6.7 with the protrusion 3b. When the ejector/Xll edge 4 (indicated by the arrow) eventually bottoms out against the backing plate 5, compression processing by the rolling part 1c and the upper end of the ejector bunch 4 begins, moving the material along the spherical surface in the circumferential direction of the die hole. let (arrow ■) Due to the movement of the material in the direction of the arrow ■ and the direction of the arrow ■, the second
Constriction between materials (undercut Y) as shown in Figure Fbl
is formed, and the metal plates 6 and 7 are caulked together.

Then, if punch 1 is forcefully removed from the material force), punch 1
The material of the metal plate 6 at the constriction part lb is moved upward by the amount of the undercut x as shown in Fig. 2 (cl).
The already formed constriction (undercut Y) between the materials remains as is, and is ejected by the ejector punch 4 as shown by the second @ (cl) to complete the joining process.

As mentioned above, by the present invention in which the shapes of the punch 1 and the die 3 are devised, not only can caulking be performed in one step, but also
Since it has a simple die structure that does not require lateral movement, the cost of the joining device can be reduced. Furthermore, since the die structure does not require lateral movement, the pitch between joints can be shortened, which is advantageous in caulking joint processing.

Effects> According to the present invention, it is possible to reduce the cost of the bonding device, and it is also possible to shorten the pitch between the bonding devices.

[Brief explanation of the drawing]

Figures 1 (al, b) are sectional views of essential parts of the bonding device of the present invention, Figures 2 (at, fbl, (cl) are process diagrams explaining the bonding mechanism by the bonding device of the present invention, Figure 3, Fig. 4 is a cross-sectional view of the joining surface and the main parts after joining in the conventional example. Reference numeral 1: Punch, 1a: Compression processing section, 1b: Constriction, 1c: Rolling processing section, 3: Die, 3a: For material flow out. Protrusion. Agent: Patent attorney Takeshi Sugiyama (and 1 other person) Figure 3 Figure 4

Claims (1)

[Claims] 1. A joining device that compresses and caulks stacked metal plates using a punch and die, which provides a compressed portion having a rake angle θ on the periphery and an undercut x.
A metal plate joining device comprising: a punch having a rolled part in the center with a constriction; and a die having a protrusion on the periphery to prevent material from flowing out.