JP2518586B2 - Caulking method and caulking device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking method and a caulking device for caulking a caulking member such as a nut onto a caulking member such as a steel plate.

[0002]

2. Description of the Related Art Conventionally, when a caulking member such as a nut is caulked to a caulking member such as a steel plate, a lower die having an upper surface formed on a supporting portion of the caulking member and a lower die are moved up and down by an elevating plate. And a caulking member for driving the caulking member to be supported by the supporting portion by lowering the caulking die for caulking the caulking member to punch out the caulking hole and simultaneously caulking the caulking member for the caulking member. Although the conventional caulking device is widely used, in the conventional caulking device of this type, a positioning pin to be inserted into an alignment hole formed through the caulking member is provided around the lower die, and thereby the caulking member is provided. After crimping, the caulking member is pressed and fixed with a pad material etc. provided on the elevator board, and the caulking member is punched out and the nut is caulked simultaneously by lowering the caulking die. Both were those to be discharged to the outside in the scrap removal apparatus incidental to this scrap punched from the caulking member through the cylindrical crimping die cylindrical hole.

However, since the positioning hole formed through the caulking member has a diameter larger than the outer diameter of the positioning pin, the caulking position accuracy is low, and the caulking member is punched out simultaneously with the caulking. If the scraps generated by the caulking fall onto the caulking member or fall into the lower die, there is a problem that caulking failure may occur or the caulking device may malfunction.

[0004]

The problem to be solved by the present invention is to solve the above-mentioned problems, and the scrap punched from the caulking member drops onto the caulking member or the lower die. The purpose of the present invention is to eliminate the caulking failure and the failure of the caulking device, the inaccuracy of the caulking position accuracy, the complexity of the device due to the addition of the scrap removing device, and the high cost.

[0005]

According to the present invention, which has solved the above-mentioned problems, a caulking member is set above a caulking member supported on a lower die, and the caulking die is lowered to caulk the caulking member. In the crimping method of crimping a member, a crimping hole is provided in advance in the crimped member, and the crimped member is separated from the crimped member on the crimping die by a receiving pin arranged around the lower die. The caulking member is caulked with the caulking member while the caulking member is positioned by the pilot pin when the caulking die descends. the caulking wherein the caulking fitting a hole with a first aspect of the invention, the upper surface the lower mold and the lower mold formed in the support portion of the caulking member It is composed of a caulking die that is turned up and down by a lifting plate, and the caulking member is driven into the caulking member supported by the supporting part by the descending of the caulking die, and the caulking member is caulked to the caulking member. In the caulking device, a receiving pin elastically supported from below by a spring around the lower die is arranged so that its upper end is usually located above the upper surface of the lower die,
The crimping die crimping device second, characterized in that the freely fitted retractable pilot pin tapered is biased downward with a spring housed in the spring housing portion on its lower surface as having a spring storage portion Is the invention of.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail based on the embodiment of the apparatus shown in FIG. Reference numeral 1 denotes a caulking die attached to the lower surface of an elevator board 2 and movable up and down. The caulking die 1 has a pin insertion hole 5 formed in the lower surface of a tubular chair body having a spring accommodating portion 1a. A tapered pilot pin 3 that is biased downward with a spring 4 housed in a spring housing 1a is fitted in the pin insertion hole 5 so as to be retractable. The pilot pin 3 has a flange portion 6 which is engaged with the hole edge of the pin insertion hole 5 at the base end thereof, and a taper guide portion 7 for guiding the caulking hole formed at the tip end thereof. It is possible to position the 20 at an accurate crimping position.

Reference numeral 8 is a lower die having a supporting portion 8a of a caulking member recessed on the upper surface, and a caulking member 30 such as a nut is placed on the supporting portion 8a of the lower die 8. Reference numeral 10 denotes a plurality of caulking member holding mechanisms arranged around the lower die 8. The caulking member holding mechanism 10 has a spring 11 housed in a guide tube 12 and a receiving pin 13 elastically supports the lower part from below. The upper end of the receiving pin 13 is always located above the upper surface of the lower mold 8. In the figure, 14 is around the lower mold 8 and is a caulking member 20.
Is a positioning pin that is inserted into and engaged with the through hole 21 for positioning provided in the.

With such a structure, a caulking hole 22 having a diameter slightly larger than the diameter of the caulking portion of the caulking member 30 is punched at a required position of the caulking member 20 in a separate step in advance, and the caulking hole 22 is punched by a press. Pin 1 for receiving the caulking member 20
When the lifting plate 2 is lowered after being mounted and supported on the upper plate 3, the crimping die 1 attached to the lower surface of the lifting plate 2 is also lowered.
In the pilot pin 3 protruding downward from the lower end of the caulking die 1 by the spring 4 in the spring accommodating portion 1a, first, the taper guide portion 7 at the tip is caulked hole 22 of the caulking member 20.
Will come into contact with. As the taper guide portion 7 of the pilot pin 3 is fitted into the caulking hole 22 as the elevator board 2 descends, the caulking member 20 is centered and accurately positioned by the pilot pin 3 and is caulked. The member 20 is pushed by the caulking die 1 and descends to the upper end of the guide cylinder 12 together with the receiving pin 13 elastically supported by the spring 11.

When the pilot pin 3 comes into contact with the nut as the caulking member 30 on the lower die 8, the pilot pin 3 is housed in the caulking die 1 against the elastic force of the spring 4 and continues. When the elevator board 2 descends, the caulking die 1 caulks the caulking member 20 and the nut on the lower die 8 to be integrated. After the caulking operation is completed in this way, the elevator platen 2 is raised to raise the caulking die 1, and the caulking member 20 in which the caulking member 30 is integrated.
The receiving pin 10 biased by the spring 11 floats above the lower mold 8 and facilitates carrying out to the next step.

[0010]

As is apparent from the above description, the present invention not only increases the accuracy of the crimping position of the nut, but also punches by a press in a separate step without crimping the crimping hole at the same time. And the scrap removal mechanism becomes unnecessary, and the device can be provided at a low cost. Moreover, scrap may fall onto the caulking member or the lower mold and cause caulking failure or device failure. It has many advantages such as not having it. Accordingly, the present invention is conventional for this kind staking method及
There is an extremely large place to contribute to the development of the industry of as having to solve the problems of the fine caulking equipment.

[0011]

As is apparent from the above description, the present invention not only increases the accuracy of the crimping position of the nut, but also punches by a press in a separate step without crimping the crimping hole at the same time. And the scrap removal mechanism becomes unnecessary, and the device can be provided at a low cost. Moreover, scrap may fall onto the caulking member or the lower mold and cause caulking failure or device failure. It has many advantages such as not having it. Therefore, the present invention is extremely large in that it contributes to the development of the industry by solving the problems of the conventional caulking die and caulking method and caulking device of this type.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the device of the present invention.

[Explanation of symbols]

 1 Caulking die 1a Spring housing 2 Lifting board 3 Pilot pin 4 Spring 5 Spring housing 8 Lower die 8a Support 11 Spring 13 Receiving pin 20 Caulking member 22 Caulking hole 30 Caulking member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Morishima Kenichi Morishima Oguchi-machi, Niwa-gun, Aichi Prefecture 1 Otakaki, Oyashiki 1 Aoyama Manufacturing Co., Ltd. Oguchi Plant (56) Reference JP-A-47-31264 (JP, A) )

Claims (2)

(57) [Claims] 1. An upper part of a caulking member supported on a lower mold.
Set the member to be caulked and descend by caulking die
Was the caulking member crimped to the caulked member?
In the caulking method, a caulking hole is previously formed in the member to be caulked.
It is provided and this caulking member is placed around the lower mold.
Separated from the caulking member on the caulking die with the receiving pin
Supported elastically and downward by the spring stored inside.
The tapered pilot pin that is ejected when it protrudes from the lower end surface
The pilot pin is lowered by lowering the caulking die.
Position the caulking member with the caulking member and caulking hole
Caulking method characterized by fitting and crimping
Law. 2. The upper surface is formed on the supporting portion (8a) of the caulking member.
The lower mold (8) and the lower mold (8) by facing the lower mold (8)
It consists of a caulking die (1) that is moved up and down.
Is the chair (1) lowered to support it on the support part (8a)?
Drive the caulking member into the caulking member and crimp the caulking member into the caulking member.
In the crimping device in which the crimping member is crimped,
A spring (11) is installed around the lower mold (8) to support the elastic force from below.
The upper end of the receiving pin (13) is always on the lower die (8).
While arranging so that it is located above the plane,
The die (1) has a spring housing (1a)
Hold the spring (4) housed in the spring housing (1a) on the surface
Adjustable tapered pilot pin (3) can be retracted
A caulking device characterized by being fitted in.