JPH09234528A - Caulking method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute caulking having high combined force by biting both materials to the piled materials with a first punch and upsetting and biting both materials with a second punch. SOLUTION: At the time of caulking the steel plate, etc., the material 1 at the punch 3 side and the material 2 at a die 4 side are piled and set to the die 4. The first punch 31 is inserted toward a space 5 and both materials 1, 2 are deformed to a shape along the first punch 31, die holder 42 and fixed die 43. Successively, the second punch 32 is punched toward both materials 1, 2 and both materials 1, 2 are pushed and caulked with the projecting part 321 of the second punch 32 and the outer peripheral part of recessed part of the fixed die 43 to upset the material 1 to the material 2. Accompanied with widening of both materials 1, 2, the die holder 42 is divided into two pieces and both materials 1, 2 are widened toward the outside in the diameter direction of the hole in the die holder 42 and further, the material 1 is bitten to the material 2 to execute the intense caulking combination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimping method for crimping stacked materials placed in a die by punching.

[0002]

2. Description of the Related Art The conventional caulking method is "new steel plate joining technology" (Bethlehem Steel Cor).
p., published by Sanyo Kikai Co., Ltd.). 6 is a side view of a die used in a conventional caulking method, FIG. 7 is a top view of FIG. 6, FIG. 8 is a sectional view taken along line BB ′ of FIG. 7, and FIG. It is a figure which shows the process of the crimping method.

In this conventional caulking method, as shown in FIGS. 6 to 9, first, a material 81 on the side of the punch 83 and a material 82 on the side of the die 84 are superposed, and then both materials 81, 82 are mounted on the base member 84a. And a straight hole 84ba into which the punch 83 can be inserted, the base member 84a and the mounting portion 84bb.
It rotates by using the mounting portion of
A die holder 84b attached so as to be bisected by a dividing surface 84bc which passes through the center of the hole 84ba and is parallel to the axial direction of the hole 84ba, and the hole 84b of the die holder 84b.
The tip portion is inserted into the hole 84ba from the opening on the other end side of a,
One end of the die holder 84b facing the opening on the one end side has a flat surface, and the die 84 having a fixed die 84c fixed to the base member 84a is provided in the hole 84b of the die holder 84b.
It is fixed by closing one end side opening of a (in FIG. 9,
a).

Next, the punch 83 is inserted into the hole 84b, that is,
The materials 81 and 82 are inserted into the space 85 surrounded by the inner peripheral surface of the die holder 84b and the flat surface end of the fixed die 84c, and both materials 81 and 82 are fixed to the outer peripheral side surface of the punch 83 and the fixed die 8.
4c, one end surface facing the flat surface end portion, and the die holder 8
The inner peripheral surface of 4b and the end of the flat surface of the fixed die 84c are stretched and deformed (b in FIG. 9).

Further, the punch 83 is formed on both materials 81 and 82,
Then, it is driven toward the fixed die 84c, and both materials 8
The holes 1 and 82 are crushed by being sandwiched between one end surface of the punch 83 and the flat surface end portion of the fixed die 84c, so that the holes 8
4ba outwardly in the radial direction, the dies holders 84b, 84b are pressed by the expansion of both members 81, 82, and rotate with the mounting portion of the base member 84a and the mounting portion 84bb as a fulcrum to be divided by the dividing surface 84bc. The material 81 is divided into two, and the material 81 on the punch 83 side bites into the material 82 on the die 84 side to caulk and bond (c in FIG. 9).

[0006]

However, according to the above-mentioned conventional caulking method, the material 81 on the side of the punch 83 is formed.
However, since the amount of bite into the material 82 on the die 84 side is small, the binding force by caulking both materials 81, 82 is weak,
In order to increase the coupling force, the space 85 is extended in the axial direction to increase the insertion amount of the punch 83 into the hole 84ba in FIG. 9B, and the punch 83 side in C in FIG. It is conceivable that the binding force of the material 81 of FIG. 9 into the material 82 on the die 84 side is increased to improve the binding force by caulking of both materials 81, 82, but in FIG. By increasing the deformation of both materials 81, 82 with the increase of the insertion amount into 84ba, a wall surface is formed along the outer peripheral side surface of the punch 83 and the inner peripheral surface of the die holder 84b particularly in FIG. 9B. Since the material 82 on the punch side which is stretched and deformed to the thin side becomes thin and its strength is reduced, it is not possible to increase the insertion amount of the punch 83 into the hole 84ba. Improve the binding force by I have had a problem in that the door can not be.

[0007] The present invention has an object of providing a caulking method having a higher binding force.

[0008]

In order to solve the above-mentioned technical problems, after the material on the punch side and the material on the die side are superposed, the both materials are straightened from the base member and the opening on one end side thereof. A hole having a first hole portion and a second hole portion continuous with the first hole portion and expanding inward in the axial direction. A die holder attached so as to be separable by a division surface parallel to the axial direction, and the die holder is inserted into the hole from the other end side opening of the hole, and the axial direction is provided at the end of the die holder facing the one end side opening. The first punch of the punch, which comprises a first die and a second punch, is installed in the die including a fixed die having a recessed portion for reducing the diameter so as to close one end side opening of the hole of the die holder. Is inserted toward the hole and the Then, the second punch is driven toward both the materials, and the material on the punch side is changed to the material on the die side while sandwiching the both materials with the second punch and the outer peripheral portion of the recess of the fixed die. The fixed die and the second punch are swaged to swage the two materials, and the die holder is divided by swaging the two materials by swaging the punch side material to the die side material. Configured the rule method. Preferably,
The second punch includes a protrusion that protrudes toward both materials at a portion facing the outer periphery of the recess of the fixed die, and the material on the punch side is the material of the die side and the recess of the fixed die. A caulking method in which the two punches are set up by the protruding portion and the both materials are swaged is desirable.

In the crimping method of the first aspect, first, the punch side material and the die side material are superposed, and then both materials are
Install in the die so as to close the opening on one end side of the hole of the die holder.

Next, the first punch is inserted toward the hole of the die holder, that is, the space surrounded by the inner periphery of the die holder and the recess of the fixed die, and both materials are inserted into the outer peripheral surface of the first punch and the fixed die. One end surface facing the concave portion of,
The inner peripheral surface of the die holder and the concave portion of the fixed die are stretched and deformed while being stretched.

That is, by inserting the first punch, both members are draw-formed in the straight first hole, and by further inserting the first punch, the second hole that expands inward in the axial direction. In the above, both materials are flown outward in the radial direction of the hole along the inner peripheral surface of the die holder, the material on the punch side begins to bite into the material on the die side, and eventually, the material between the first punch and the concave portion of the fixed die is formed. Is crushed and both materials are further flown outward in the radial direction of the hole, and the material on the punch side cuts into the material on the die side.

Next, while the first punch is being driven, the second punch is driven toward both materials, and the second punch is driven.
Both materials sandwiched between the punch and the recess of the fixed die are
Set it up with the punch and recess and crimp it.

That is, both materials sandwiched between the second punch and the concave portion are set and caulked by the driving of the second punch, but the first punch is driven when the second punch is driven. Therefore, both materials do not flow into the inside of the hole of the die holder in the radial direction, but flow into the outside of the hole in the radial direction and are set up. By being installed, both materials spread outward in the radial direction of the hole, and as both materials expand outward in the radial direction of the hole, the die holder is pressed outward in the radial direction of the hole, and the die holder becomes a split surface. Thus, the two materials are further spread outward in the radial direction of the hole as the die holder moves in a divided manner, and the punch side material bites into the die side material, and caulking is performed.

According to a second aspect of the present invention, in addition to the function of the first aspect, the first punch is driven while the first punch is driven.
The second punch is driven toward both materials, and both members sandwiched by the protruding portion of the second punch and the outer peripheral portion of the recess of the fixed die are set up by the protruding portion and the outer peripheral portion of the recess. That is,
By the driving of the second punch, both members sandwiched by the protruding portion and the outer peripheral portion of the concave portion are set up, but since the first punch remains in the driven state, there is no possibility that the inner side of the hole is radially inward. Both materials do not flow in, but flow outward in the radial direction of the hole and are set up.

[0015]

Embodiments of the present invention will be specifically described below.

FIG. 1 is a side view of a die used in the crimping method of the present embodiment, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a cross section taken along the line AA ′ of FIG. It is a figure. FIG.
As shown in FIGS. 3 to 3, the die 4 is connected to the base member 41, the straight first hole portion 421a indicated by the length L1 portion in FIG. 3 from the one end side opening, and the first hole portion 421a. A hole 421 having a second hole portion 421b shown by a length L2 portion in FIG. 3 that expands inward in the axial direction is provided,
The die holder attached to the base member 41 so as to be divided into two parts by rotating around the attachment portion with the attachment portion 422 as a fulcrum, and by the division surface 423 which passes through the center of the hole 421 and is parallel to the axial direction of the hole 421. 42, the tip portion is inserted into the hole 421 from the other end side opening of the hole 421 of the die holder 42, and the diameter of the end of the die holder 42 facing the opening of the hole 421 one end side is reduced in the axial direction toward the base member 41 side. The concave die 431 is provided, and the fixed die 43 fixed to the base member 41 is provided.

FIG. 4 is a sectional view of the punch 3 used in the crimping and joining method of this embodiment. As shown in FIG. 4, the punch 3 has a cylindrical first punch 31 whose one end surface is flat, and a portion whose one end is flat and which faces the outer peripheral portion of the recess 431 of the fixed die 43 on this end surface. And a second punch in which the first punch 31 is inserted into the hole 322.

The diameter of the first hole portion 421a (in FIG. 3) of the die holder 42 is the same as that of the protruding portion 321 of the second punch 32 (see FIG. 4).
The inside diameter is approximately equal.

FIG. 5 is a diagram showing the crimping step of this embodiment. As shown in FIGS. 1 to 5, first, the material 1 on the punch 3 side and the material 2 on the die 4 side are superposed, and then both materials 1 and 2 are opened in the die 4 at one end side opening of the hole 421 of the die holder 42. It is installed so as to close it (a in FIG. 5).

Next, the first punch 31 is inserted toward the hole 421, that is, the space 5, and both materials 1 and 2 are fixed to the outer peripheral side surface and the end surface of the first punch 31, the inner peripheral surface of the die holder 42. The die 43 is deformed while being stretched to a shape along the recess 431 (FIG. 5, b).

That is, by inserting the first punch 31, both materials 1 and 2 are draw-formed in the straight first hole 421a, and by further inserting the first punch 31, the materials 1 and 2 are expanded inward in the axial direction. In the second hole portion 421b having the diameter, both the materials 1 and 2 are formed into a hole 42 along the inner peripheral surface of the die holder 42.
1, the material 1 starts to bite into the material 2, and eventually the first punch 31 and the recess 43 of the fixed die 43.
Both materials 1 and 2 are crushed between 1 and
Are further flowed outward in the radial direction of the hole 421, so that the material 1 becomes the material 2
It will cut into (in Fig. 5, b).

Next, with the first punch 31 being driven in, the second punch 32 is driven toward both the materials 1 and 2, and the outer periphery of the protrusion 321 of the second punch 32 and the recess 431 of the fixed die 43. Both materials sandwiched between part 1 and 2
Is squeezed by the projecting portion 321 and the outer peripheral portion of the concave portion 431 so that the material 1 is set in the material 2.

That is, by driving the second punch 32,
Both materials 1 and 2 sandwiched by the protruding portion 321 and the outer peripheral portion of the recess 431 are installed and caulked, but the first punch 3
Since 1 remains in the driven state, both materials 1 and 2 do not flow inward in the radial direction of the hole 421, and flow outward in the radial direction of the hole 421 and are set up. When the material 1 is installed in the material 2, both materials 1 and 2 are provided with holes 4
21, the die holder 42 is pressed outward in the radial direction of the hole 421 as the materials 1 and 2 spread outward in the radial direction of the hole 421, and the base member 41 and the mounting portion. It rotates about the mounting portion with 422 as a fulcrum and is divided into two parts by the dividing surface 423, and as the die holder 42 moves, both materials 1 and 2 further spread outward in the radial direction of the hole 421, and further material 2 The material 1 will bite into and will be caulked and bonded (c in FIG. 5).

As described above, according to the crimping method of the present embodiment, both materials 1 and 2 are made to bite by driving the first punch 31, and further both materials are driven by driving the second punch 32. Since 1 and 2 can be made to bite, it is possible to provide a caulking method that can obtain stronger caulking bond.

Furthermore, since the amount of deformation of the materials 1 and 2 due to the expansion caused by the driving of the first punch 31 is not increased, there is no fear that the strength is lowered.

In this embodiment, the die holder 4
No. 2 adopts a configuration in which it is rotated about the attachment portion of the base member 41 and the attachment portion 422 as a fulcrum and is divided into two by the dividing surface 423, but it goes without saying that the configuration is not particularly limited to this configuration. Also, the first punch 31 is the second
Although the structure is adopted in which the punch 32 is inserted, it goes without saying that the structure is not particularly limited to this structure.

Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment but includes various embodiments according to the principle of the present invention.

[0028]

As described above, according to the first aspect of the present invention, by punching the first punch, both materials are bited, and by punching the second punch, both materials are further set up. Since it is possible to make a bite, it is possible to provide a caulking method that can obtain a stronger caulking bond.

Furthermore, since the amount of deformation of the two materials due to the expansion caused by the driving of the first punch is not increased, there is no fear that the strength of both materials will be reduced.

According to the invention of claim 2, in addition to the effect of claim 1, a better form of the second punch is shown.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a die used in a crimping method according to an embodiment.

FIG. 2 is a top view of FIG.

FIG. 3 is a sectional view taken along line A-A ′ of FIG. 2;

FIG. 4 is a cross-sectional view of a punch used in the crimping method according to the embodiment.

FIG. 5 is a diagram showing steps of the crimping method according to the embodiment.

FIG. 6 is a sectional view of a die used in a conventional caulking method.

FIG. 7 is a top view of FIG.

8 is a cross-sectional view taken along the line B-B ′ of FIG. 7.

FIG. 9 is a diagram showing steps of a conventional caulking method.

[Explanation of symbols]

 1 Material 2 Material 3 Punch 31 First Punch 32 Second Punch 321 Projection Part 4 Dies 41 Base Member 42 Die Holder 421 Hole 421a First Hole 421b Second Hole 423 Dividing Surface 43 Fixed Die 431 Recess

Claims (2)

[Claims] 1. A punch side material and a die side material are superposed on each other, and then the both materials are put into a base member, a straight first hole portion from an opening on one end side thereof, and a first hole portion. A hole having a second hole portion that is continuous and expands inward in the axial direction is provided, and is attached to the base member so as to be dividable by a dividing surface that passes through the center of the hole and is parallel to the axial direction of the hole. A die holder, and a fixed die which is inserted into the hole from the other end side opening of the hole of the die holder and has a recessed portion that reduces the diameter in the axial direction at the end facing the one end side opening of the die holder. The die holder is installed in the die so as to close the opening on one end side of the hole, and the first punch of the punch including the first punch and the second punch is inserted toward the hole to insert the both materials. Caulking, then punch the second punch toward both materials. A method of crimping, in which both members are swung up and swung by the fixed die and the second punch, and the die holder is divided as the both materials are swung up. 2. The second punch is provided with a projecting portion projecting toward the both materials at a portion facing the outer peripheral portion of the concave portion of the fixed die, and the both materials are provided with an outer peripheral portion of the concave portion of the fixed die. The caulking method according to claim 1, wherein the caulking is performed by installing the cauldron with the protrusion of the second punch.