JP2807986B2 - Plate joining method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a plurality of plate members in a laminated state.

[0002]

2. Description of the Related Art Conventionally, means such as welding and rivet joining have been used to join two or more sheets of steel such as steel plates. Recently, a simpler means called burring caulking has been used. Bonding means is used.
As shown in FIG. 3 (a), the burring crimping is performed by first supporting two plate members to be joined in a stacked state, and passing a punch 20 through the plate members to perform burring processing. After forming the cylindrical portions t1 and t2 that overlap each other on P1 and P2, subsequently, as shown in FIG. 3B, the anvil 30 is raised and the cylindrical portions t1 and t2 are crimped so as to be unwound and the plate material P1 is formed. , P2.

[0003]

The burring caulking is such that the plate members are joined by hooking by caulking the tubular portion. When joining plate materials, the joining force of the plate materials greatly differs depending on the amount of hooking. In the above-mentioned burring caulking, when a plate material is punched out by a punch, a portion stretched in contact with a punch tip surface of the plate material is broken and separated (hereinafter, this broken portion is referred to as a broken portion). As a result, the tubular portion is shortened, and the portion of the tubular portion that is caught at the time of rewinding is reduced, which causes problems such as the inability to securely join the plate members. Also, when rewinding the tubular part,
The above-mentioned fractured chips may be involved, which causes problems such as the inability to correctly join the plate members. Furthermore, it is necessary to separately provide a mechanism and a process for discharging breakage debris, and accordingly, the number of steps for joining the plate materials increases, and there is a problem that time is required for joining the plate materials.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to opposing sides.
Connect two surfaces with different inclination angles to each end of
Formed slopes that intersect at the tip
By doing so, the tip of the punch has a sharp shape surrounded by a plane, and the punch is configured to be able to advance and retreat, and a plurality of plates are supported on the tip movement path in a stacked state, and the punch is attached to the plate. Penetrate and break the plate material to tear along the punch, form a hole in each plate material and a protruding piece cut and raised at the edge of this hole, and fold so that the protruding pieces of each plate material overlap each other This is a joining method of a plate material for integrally joining the plate materials. According to this joining method, since the plate material is broken so as to be cut by the punch,
There is no occurrence of breakage debris that separates from the plate material.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes a plate joining device, which is a punch 2 which can be moved up and down by operating a reciprocating drive source (not shown) such as a hydraulic cylinder or a pneumatic cylinder; And an anvil 3 arranged below. The punch 2 is formed by cutting the ends of the opposing side surfaces of a rectangular parallelepiped member on the inclined surface 2a, and is configured so that the end is surrounded by two parallel surfaces and two inclined surfaces 2a. ing. Each of the inclined surfaces 2a is formed by connecting two surfaces having different inclination angles, and the tip of each of the inclined surfaces 2a intersects to form a sharp ridge line at the tip of the punch. I have. The punch 2 is housed in a guide path 4a formed on the support member 4, and the guide path 4a
It is configured to move along.

The anvil 3 is provided on the upper surface 3a of the prism member.
And a substantially trapezoidal projection 3b is integrally formed on the
Like the punch 2, the reciprocating drive source (not shown) is operated so that it can move up and down and retreat. The anvil 3 is a guideway 5a for a die 5 on which a plate material serving as a work can be set.
And is configured to move along the guide path 5a. The convex portion 3b of the anvil 3 is configured to be able to enter the guide path 4a of the support member 4.

When joining the plate members, two plate members P1 and P2 to be joined are placed on a die 5 in a stacked state, and then, as shown in FIG. It is lowered to support the plate material P1, P2 with the die 5.
Subsequently, as shown in FIG. 1B, the punch 2 is lowered by the operation of the reciprocating drive source (not shown), and the plate materials P1, P2
Is performed. At this time, since the tip of the punch 2 is sharp and the surface other than the inclined surface 2a is formed vertically, the plate materials P1 and P2 are
It breaks at the tip and is cut off. Therefore, each plate material P
A rectangular hole h and protruding pieces s cut and raised at both end edges of the hole h are formed in 1 and P2. In addition, plate material P
Since the punches 1 and P2 are cut by the punch 2, no breakage is generated from the plate materials P1 and P2 as in the related art.

Thereafter, as shown in FIG. 1C, as the punch 2 rises, the anvil 3 rises, and the plate material P
A process of folding back the protruding piece s of P1 and P2 is performed. With the rise of the anvil 3, the convex portion 3a is fitted into the hole h of the plate material P1, P2, and the protruding piece s is pushed and bent along the convex portion 3b. Then, the protruding piece s is deformed along the upper surface portion 3a of the anvil 3, and is folded and crimped so that the protruding piece s of the plate P1 overlaps the protruding piece s of the plate P2. As described above, since there is no loss due to generation of breakage in the plate material, at this time, the projecting piece s of the plate material P1 surely and favorably overlaps with the projecting piece s of the plate material P2. Therefore, the plate materials P1, P2
Can be securely and firmly bonded. In addition, since the protrusions s have a sufficient size to be polymerized with each other in this manner, it is not necessary to perform a process of stretching the protrusions s in order to obtain reliable polymerization, and generally the fluidity is poor, Even a plate material that is difficult to stretch can be easily joined.

In the embodiment of the present invention, the punch 2
The punch 2 is formed with two parallel surfaces and a sharp point surrounded by the two inclined surfaces.
Although formed at the end , the same effect can be obtained even if the tip of the punch 2 is formed into a polygonal pyramid shape having a sharp tip such as a triangular pyramid or a quadrangular pyramid by forming more inclined surfaces. . Also, the description has been given of the joining of the two plate materials P1 and P2, but the present invention is not limited to this, and the present invention can obtain the same effect even if there are three or more plate materials. You can do it.

[0010]

As described above, according to the method of joining plate materials of the present invention, a punch having a sharp tip is formed by forming an inclined surface on a rectangular parallelepiped member, and this punch is applied to a plurality of plate materials in a stacked state. By penetrating, a hole and a protruding piece cut and raised at the edge of the hole are formed in each plate material, and the protruding pieces of each plate material are folded back so as to overlap each other and the plate material is integrally joined. . According to this joining method, since the plate material is fractured so as to be torn by the punch, the breakage that has been seen in the conventional burring caulking does not occur, and the protruding pieces can be reliably polymerized to securely and firmly join the plate material. At the same time, when the protruding piece is folded back and crimped,
There is an advantage such that breakage debris is not involved and the plate material can be correctly joined. In addition, there is no need to perform a step of discharging punched chips, so that the time required for joining the plate materials can be shortened, and there is an advantage that the joining of the plate materials can be performed continuously.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view showing a method of joining plate materials according to the present invention.

FIG. 2 is a cross-sectional perspective view of a main part showing a method of joining plate materials according to the present invention.

FIG. 3 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate joining apparatus 2 Punch 2a Inclined surface 3 Anvil 3a Top surface 3b Convex part 4 Support member 4a Guideway 5 Die 5a Guideway P1 Plate material P2 Plate material h hole s Projection piece

Claims (1)

(57) [Claims] An end of each of the opposing side surfaces has an inclined angle.
Forming an inclined surface composed of two different surfaces connected to each other,
To make a sharp tip
The punch is configured to be able to move forward and backward, and a plurality of plate members are supported in a stacked state on the leading end moving path, and the punch is penetrated through each of the plate members to cut the plate members. A method of joining plate materials, comprising forming a cut-and-raised projecting piece, and folding the projecting pieces of each plate material so as to overlap each other to integrally join the plate materials.