JPH02258122A - Caulked member, caulking structure and caulking method - Google Patents

Abstract

PURPOSE:To increase the bonding strength without breaking a plated layer by giving plastic deformation to a flange part provided in the axial direction of a cylindrical part and in its intermediate part so that the intermediate part of the cylindrical part projects outward in the U-shape in the vertical cross section. CONSTITUTION:The tip side of a caulked member 1 is fitted into a bonding hole 5 of an opponent member 4, the caulked member 1 is fitted into a support hole 9 of a lower die 7 and the flange part 2 is brought into contact with the upper surface of the lower die 7. When the upper die 8 is lowered under this state, a small diameter part 8b enters the caulked member 1. When the upper die 8 continues to be lowered further, the bottom surface 8c of a large diameter part 8a presses the tip part of the caulked member 1 in the axial direction, a part between the tip of the caulked member 1 and the flange part 2 overhangs the outside and the vertical section undergoes U shaped plastic deformation. In this way, the opponent member 4 is caulked between the deformed part 10 of the caulked member 1 and the flange part 2 and the caulked member 1 cannot move to the opponent member 4 and is fixed surely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a caulking member that can be joined to other members by caulking work, and a caulking structure and caulking method using the caulking portion.

[Conventional technology]

Conventionally, when joining two metal members, in many cases,
These two metal parts were welded together.

However, the conventional nut fixing method as described above has (a) high welding costs;

(b) Even if each metal member is plated, the plating layer is destroyed by welding, so after welding, it is necessary to plate the parts again to prevent rust, which also increases costs.

': There was a problem with ti.

Therefore, the present applicant previously proposed a caulking method capable of solving these problems in Japanese Patent Laid-Open Nos. 61-290221 and 61-290222.

[Problems to be Solved by the Invention] The present invention further improves the invention of the present applicant, and provides a caulking member that can be more firmly connected to a mating member by caulking work, and a caulking member using the caulking member. The purpose of the present invention is to provide a one-piece caulking machine and a caulking method.

[Invention or problem to be solved]

The caulking member according to the present invention includes a cylindrical portion and this 1:? The cylindrical portion includes a flange portion provided at an axially midway portion of the +-shaped portion, and a 1;71 slot cut into the cylindrical portion in the axial direction from the tip of the cylindrical portion toward the flange portion. The horn portion is formed by plastically deforming the midway portion of the cylindrical portion so as to protrude outward with a U-shaped longitudinal section.

Further, in the caulking method of the caulking member according to the present invention, a coupling hole into which the cylindrical portion of the caulking member can fit into a mating member to be combined with the caulking member and a cutout of the caulking member can be fitted. a cut-out fitting portion is provided, and the cylindrical portion is fitted into the coupling hole so that the cut-out fitting portion is fitted to the cut-out fitting portion at the same time,
The portion of the cylindrical portion that has passed through the coupling hole is plastically deformed into a U-shaped longitudinal section, and the mating portion (A) is caulked between this plastically deformed portion and the flange portion.

Furthermore, in the method for manufacturing a caulking member according to the present invention, a coupling hole into which the cylindrical portion of the caulking member can be fitted and a cutout of the caulking member can be fitted into a mating member to be combined with the caulking member. a cut fitting part, and an enlarged part larger than the inner diameter of the cylindrical part, and a small diameter part having an outer diameter corresponding to the inner diameter of the caulking part and protruding from the enlarged part. 112J, and with the cylindrical part fitted into the coupling hole so that the slit or the slit fitting part is fitted, insert the small diameter part of the mold into the cylindrical part. By pressing the tip of the cylindrical part in the axial direction with the enlarged part of the mold while inserting the mold, the part of the cylindrical part that has passed through the coupling hole is plastically deformed into a U-shaped longitudinal section, and this plastic deformation The mating member is caulked between the deformed portion and the flange portion.

[Effect]

According to the present invention, the caulking member cannot rotate relative to the mating member because the slit is fitted into the slit fitting portion of the mating member. In addition, by being caulked between the plastically deformed part of the mating member's caulking member and the collar, the caulking member can also move in the axial direction of the cylindrical part relative to the mating member. It disappears. Therefore, by crimping the mating member with two crimping members, the crimping member and the mating member are fixed to each other.

Here, if the caulking member is not provided with a collar, the mating member will be caulked between the cut end of the caulking member and the deformed part, which will increase the bonding strength between the caulking member and the mating member. However, the mechanical strength depends on the strength of the end portion of the cut, which has a relatively low mechanical strength, and there is a possibility that the joint strength may not be sufficient.

However, in the present invention, a collar portion with high mechanical strength is provided by plastically deforming the middle part of the cylindrical part of the caulking member so as to protrude outward in a U-shaped longitudinal section. Since the mating member is caulked between the saw blade and the deformed portion, the caulking member and the mating member are more firmly connected.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

1 to 10 show a first embodiment of the present invention, in which a metal caulking part 1 has a cylindrical shape as a whole.

A collar portion 2 is provided at a midway portion in the axial direction of the caulking member 1, and this collar portion 2 protrudes outward with a U-shaped cross section over the entire circumference of the midway portion of the caulking member 1. It is made by plastic deformation. On the tip 1a side of the caulking member 1, a slit 3 is cut in the axial direction from the tip 1a toward the part 2. The cutouts 3 can be provided in an appropriate number of one or more, and in this embodiment, two cutouts 3 are provided at positions 180 degrees apart from each other.

FIG. 5 shows an example of a mating member 4 to which the caulking member 1 is to be coupled and fixed. The mating member 4 is made of metal and has a plate shape, and is provided with a coupling hole 5. The coupling hole 5 is approximately circular in shape with a diameter slightly larger than the outer diameter of the caulking member 1, and is cut and fitted from the mating member 4 around the coupling hole 5 at positions that are 180 degrees apart from each other. The joint portion 6 is projected toward the center of the joint hole 5.

The cut fitting portion 6 has a width slightly smaller than the width of the cut 3.

In FIGS. 7 and 8, numerals 7 and 8 indicate molds for performing the caulking work of the caulking member 1 in the present invention. The lower mold 7 is fixed at a fixed position, and has a support hole 9 provided in the vertical direction.

The second side mold 8 has a stepped cylindrical shape having an enlarged part 8a and a small diameter part 8b protruding below the enlarged part 8b, and the small diameter part 8b is slightly smaller than the inner diameter of the caulking part 1. What is the outside diameter? The enlarged portion 8a has a larger outer diameter than the small diameter portion 8b, and the bottom surface 8c of the enlarged portion 8a has a planar shape extending in the horizontal direction. Furthermore, a stepped portion 8d is formed between the enlarged portion 8a and the small diameter portion 8b. The upper mold 8 is moved up and down above the lower mold 7 by a press machine (not shown).

6 to 8 show the process of fixing the caulking member 1 to the mating member 4. To explain this, first, as shown in FIGS. 6 and 7, the cut 3 of the caulking part 1 and the cut fitting part 8 of the mating member 4 are fitted together at the same time, and the caulking member 1 is The tip 1a side is connected to the coupling hole 5 of the mating member 4.
to fit.

As a result, the caulking part 1 cannot rotate relative to the mating member 4.

Next, with the tip 1a facing upward, the caulking part 1 is fitted into the support hole 9 of the lower mold 7, and the collar part 2 is brought into contact with the upper surface of the lower mold 7. By doing this, the caulking member 1 is set in the lower mold 7. Also, at this time, the axes of the upper mold 8 and the caulking member 1 are aligned.

Next, when the second side mold 8 is lowered in this state, the small diameter portion 8b first enters the inside of the caulking portion 1 as shown in FIG.

As the upper mold 8 is further lowered, the bottom surface 8c of the large diameter portion 8a presses the tip 1a of the caulking portion 4.11 in the axial direction, so that the gap between the tip 1a of the caulking member 1 and the collar portion 2 is The portion bulges outward, forming a U-shaped plastic umbrella shape in the longitudinal section as shown in No. 71 10 of FIG. is intruding, so caulking part 1 will not be submerged inward).

As a result, the mating member 4 is caulked between the deformed portion 10 of the caulking member 1 and the collar portion 2, and the caulking member 1 can also move in the axial direction with respect to the mating member 4. It becomes completely fixed to the mating member 4.

FIG. 9 is a longitudinal sectional view showing the state of the caulking part 1 and the mating part (4) after the caulking work is completed, and FIG. 10 is a plan view thereof.

According to the present invention, the caulking member 1 can be coupled and fixed to the mating member 4 by the caulking operation without using welding, so that the cost of the coupling operation can be reduced.

Further, according to the present invention, the mating member 4 and the caulking member 1
(!: When using a pre-plated member, the plating layer will not be destroyed by welding as in conventional methods, so after fixing the caulking member 1 to the mating member 4, re-plating it again. It is not necessary and the defense ↓111 can be achieved as it is, and the cost can be reduced in this case as well.

Further, according to the present invention, since the caulking portion 2 is deformed into a U-shaped longitudinal section, the caulking strength can be increased.

Furthermore, if the caulking member 1 is not provided with the collar portion 2, the mating member 4 will be caulked between the end of the IJ slot 3 of the caulking member 1 and the deformed portion 10, and the caulking The bonding strength between part +A1 and the mating member 4,
Since the mechanical strength depends on the strength of the end of the cut 3, which has a relatively low mechanical strength, there is a possibility that the joint strength may not be sufficient. However, in the present invention,
A collar portion 2 with a large mechanical strength is provided by plastically deforming the midway portion of the caulking member 1 so as to protrude outward in a U-shaped longitudinal section, and this collar portion 2 and the deformed portion of the caulking member 1 Since the mating member 4 is clamped between it and 10,
The caulking member 1 and the mating member 4 are more firmly connected.

FIG. 11 shows a second embodiment of the caulking member according to the present invention, and the caulking member 1 in the first embodiment shown in FIGS.
Compared to the above, the length between the portion 2 and the tip 1a is made longer. The other 1111 components are the same as in the first embodiment.

In FIGS. 12 and 13, reference numeral 78 indicates a mold for caulking the nut 1 in this second embodiment.

The lower mold 7 is the same as in the first embodiment.

The upper mold 8 has an enlarged part 8a and a small diameter part 8b projecting below the enlarged part 8b, and the small diameter part 8b has an outer diameter slightly smaller than the inner diameter of the caulking member 1. The enlarged portion 8a has a larger outer diameter than the small diameter portion 8b,
The bottom surface 8c of this enlarged portion 8a has a planar shape that extends in the horizontal direction. (1) Also, the portion around the small diameter portion 8b of the bottom surface 8c of the enlarged portion 8a has an inner diameter equal to the outer diameter of the small diameter portion 8b and an outer diameter slightly larger than the outer diameter of the caulking member 1. '/I? Iye is provided. Then, this "-side mating mold 8 is lowered by a distance y above the lower mold 7 by a press machine (not shown).

12 and 13 show the process of joining the caulking member 1 to the same mating member 4 as in the first embodiment. To explain this, first, the caulking member 1 is fitted into the coupling hole 5 of the mating member 4 and set in the lower mold 7 in the same manner as in the first embodiment.

Then, in this state, when the second side mold 8 is lowered, the small diameter portion 8b first enters the inside of the caulking member 1, and when the mold 8 is further lowered, the large diameter portion 8a enters the inside of the caulking member 1. Since the tip 1a of the ceiling surface caulking member 1 in the groove portion 8e is pressed in the axial direction, the portion of the caulking member 1 between the lower end of the side fitting 8 and the collar portion 2 bulges outward. As shown by reference numeral 10 in Fig. 13, the plastic deformation occurs in a U-shape in the longitudinal section
At this time, since the small diameter portion 8b has entered the caulking member 1, the caulking member 1 is inwardly 4! (You won't be disappointed.)

As a result, the mating member 4 is caulked between the deformed portion 10 of the caulking member 1 and the collar portion 2 in the same manner as in the first embodiment, and the caulking member 1 is in the axial direction with respect to the mating member 4. You will also be unable to move.

FIG. 14 is a longitudinal sectional view showing the state of the caulking member 1 and the mating member 4 after the caulking work is completed.

In the case of this embodiment, the portion near the tip 1a of the caulking member 1 is protected by the inner and outer circumferential surfaces of the groove 8e of the mold 8 and maintains its initial cylindrical shape, so after the caulking work is completed,
The tip 1a (-=1) of the caulking member 1 can be used for fitting another member.

15-17 show a third embodiment of the invention.

This embodiment is an embodiment in which when inserting a rod-shaped member (not shown) into the caulking member 1, it is desired to prevent the rod-shaped member from penetrating the mating part +W'4.

In this embodiment, the coupling holes 5 are arc-shaped and provided in pairs, and a cut fitting portion 6 is provided between the ends of these arc-shaped coupling holes 5.

In Figs. 16 and 17, 7 and 8 are main fixed saws.
This figure shows a mold for caulking the nut 1 in the method.

The lower mold 7 is the same as in the first and second embodiments. The upper mold 8 is the same as that of the first embodiment except that the small diameter portion 8b is shortened.

16 and 17 show the process of joining the caulking member 1 to the mating part 4 in this third embodiment. To explain this, first, the caulking member 1 is fitted into the coupling hole 5 of the mating part (44) and set in the lower mold 7 in the same manner as in each of the embodiments described above.

Then, when the upper mold 8 is lowered in this state,
First, the small diameter part 8b enters the inside of the caulking member 1, and when the mold 8 is further lowered, the bottom surface 8c of the large diameter part 8a presses the tip 1a of the caulking part) rAl in the axial direction, so that the caulking member The part between the tip 1a of 1 and the collar 2 is designated by 10.
As shown in FIG. 17, it bulges outward, and as shown in FIG. 17, it deforms into a U-shape in the longitudinal section. In addition, at this time,
In this embodiment, since the small diameter portion 8b has entered the caulking member 1 and the portion 4a between the coupling holes 5 of the mating member 4 restrains the caulking member 1, the caulking member 1 is crushed inward. (In other words, the portion 4a between the coupling holes 5 of the mating member 4 restrains the caulking portion control, so even if the small diameter portion 8b is short, the caulking member 1 will not collapse inward.) .

As a result, the mating member 4 is caulked between the deformed portion 10 of the caulking member 1 and the collar portion 2, as in the case of each of the embodiments described above, and the caulking member 1 is in a state of being caulked between the deformed portion 10 of the caulking member 1 and the mating member A'
4, it is no longer possible to move in the axial direction.

In the case of this embodiment, when a rod-shaped member (not shown) is inserted into the caulking member 1, the portion 4a between the coupling holes 5 of the mating member 4 prevents the rod-shaped member from penetrating the mating member 4. 11- can be prevented.

In each of the embodiments described above, the caulking member 1 may have a cylindrical shape as a whole, or the caulking member according to the present invention may have a cylindrical shape only in the part to be caulked.

〔Effect of the invention〕

As described above, the present invention is capable of joining the mating parts by caulking work without welding work, at low cost, without destroying the plating layer of each member, and furthermore, it is possible to greatly increase the joint strength. It is possible to obtain excellent effects.

[Brief explanation of drawings]

FIG. 1 is a front view of the first embodiment of the present invention without showing the caulking member, FIG. 2 is a side view of the caulking member, FIG. 3 is a plan view of the caulking member, and FIG. IV- in Figure 3
FIG. 5 is a plan view showing the mating member in the first embodiment, and FIG. 6 is a plan view showing the caulking member fitted to the mating member in the first embodiment. , FIGS. 7 and 8 are longitudinal cross-sectional views showing the process of caulking work in the first embodiment, and FIG. 9 is a vertical cross-sectional view showing the caulking portion 4a and the mating member after the caulking work in the first embodiment is completed. 10 is a plan view showing the caulking member and the mating member after the caulking work is completed, FIG. 11 is a front view showing the caulking member in the second embodiment of the present invention, and FIG.
2 and 13 are longitudinal cross-sectional views showing the process of caulking work in the first embodiment, FIG. 14 is a vertical cross-sectional view showing the caulking member and the mating member after the caulking work in the second embodiment, and FIG. The figure is a plan view showing a mating member in the third embodiment, and FIGS. 16 and 17 are longitudinal sectional views showing the process of caulking work in the third embodiment. 1... L-shaped member, 1a... Tip of caulking member, 2
・Brim part, 3 Cut, 4...Mating member, 5...Joining hole, 6 - Cut fitting part, 7・Lower mold, 8 Upper mold, 8a・Enlarged part, 8b・Small diameter part, 10 Plastic deformation part of caulking member. Figure Figure Figure Cause Figure Figure Figure 1゜Figure Figure Figure Figure Figure C Procedures Takeshosho May 21, 1990

Claims (1)

[Scope of Claims] 1. A cylindrical portion, a flange portion provided at an axially intermediate portion of the cylindrical portion, and an axis extending from the tip of the cylindrical portion toward the flange portion. The caulking member has a slit cut in a direction, and the brim portion is formed by plastically deforming the midway portion of the cylindrical portion so as to protrude outward with a U-shaped longitudinal section. 2. A mating hole to which the cylindrical portion of the caulking member can fit into a mating member to be combined with the caulking member according to claim 1, and a cut fitting portion into which the cut of the caulking member can fit. is provided, and at the same time the cylindrical part is fitted into the coupling hole so that the slit is fitted into the slit fitting part, and the part of the cylindrical part that has passed through the coupling hole is A caulking structure in which the mating member is plastically deformed to have a U-shaped longitudinal section and the mating member is caulked between the plastically deformed portion and the collar portion. 3. A mating member to be coupled to the caulking member according to claim 1 is provided with a coupling hole into which the cylindrical portion of the caulking member can fit and a cut fitting portion into which the cut of the caulking member can fit. At the same time, prepare a mold having an enlarged part larger than the inner diameter of the cylindrical part and a small diameter part having an outer diameter corresponding to the inner diameter of the caulked part and protrude from the enlarged part, and at the same time Expanding the mold while inserting the small diameter part of the mold into the cylindrical part with the cylindrical part fitted into the coupling hole so that the slit fits into the slit fitting part. By pressing the tip of the cylindrical part in the axial direction, the part of the cylindrical part that has passed through the coupling hole is plastically deformed into a U-shaped longitudinal section, and the plastically deformed part and the flange are A caulking method characterized in that the mating member is caulked in between.