JPS62104633A - Fixing method for plate-like member - Google Patents

Abstract

PURPOSE:To fix both plate-like members firmly without any variation in thickness nor projecting part by overlapping the 2nd plate like member which can be deformed plastically on the 1st plate-like member on which a through hole is made and by pushing the punch with smaller diameter into the through hole from the 2nd member side. CONSTITUTION:A through hole 15 is pierced by a press at the prescribed position on the 1st plate-like member 13. This through hole 15 has some drops on the upper face A, the intermediate part B is comparatively smooth and the lower part C becomes slightly in a taper rough broken-out section. This 1st plate-like member 13 is placed on a die plate 16 and the 2nd member 14 deformable plastically is overlapped thereupon. The 2nd member 14 is packed into the through hole 15 with its plastic deformation by pushing the punch which has smaller diameter than that of the through hole 15 from the upper part. This method is inexpensive without using any other parts at all, both members 13, 14 are firmly fixed without being influenced much by the punching position and the junction part has no variation in the thickness nor projecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for fixing plate-shaped members, particularly plate-shaped members such as metal frames and chassis.

[Background of the invention]

In general, the method shown in FIGS. 9 and 10 is known as a means for overlapping and fixing plate-like members. That is, in FIG. 9, reference numeral 1 indicates a first plate-like member, and a caulking through-hole 2 is bored in this first plate-like member 1. On the other hand, numeral 3 in Figure 1 is a second plate-like member which is superimposed on and fixed to the first plate-like member 1, and this second plate-like member 3 is provided with an insertion hole 5 for a rivet 4. Then, align the insertion hole 5 of the second plate member 3 so that it communicates with the caulking through hole 2 of the first plate member 1, and insert the rivet 4 into the second plate member 3 from above. , the downwardly protruding end 4a of the first plate member 1 is fixed by caulking.

Further, FIG. 10 shows another conventional example. In this case, a cut-and-raised piece 7 is formed on the first plate-shaped member 1a by cutting and raising it from the opening 6, and the cut-and-raised piece 7 is The second plate member 3a is stacked on the first plate member 1a by inserting it from below into the insertion hole 8 formed in the second plate member 3a which is fixed to the first plate member 1a. , - of the second plate member 3a
The tip 7a of the cut and raised piece 7 protruding in the h direction is caulked and fixed in the direction of the arrow shown in the figure.

However, when using the rivet 4 as shown in Fig. 9, positional accuracy of the insertion hole 5 and the caulking hole 2 is required, and if there are multiple fixing points, the work of aligning the matching holes becomes difficult. This is troublesome, and the use of the rivet 4 requires a special jig, and the rivet 4 itself increases the number of parts, resulting in high costs. Further, since the shape of the rivet 4 is standardized, it is difficult to apply it in a narrow space, and a protruding portion is generated from the surface of each plate-like member, which limits the intended use.

Further, as shown in FIG. 10, when using the cut and raised piece 7, the mold becomes complicated to form the cut and raised piece 7, and the cut and raised piece 7 is required to have bending strength.
It requires a certain amount of thickness and size, and cannot be applied to narrow areas. Furthermore, since the bending process is performed on the cut-and-raised piece 7, it is difficult to achieve dimensional accuracy in position, and it is difficult to apply this method when there are a plurality of fixing points.

[Purpose of the invention]

The present invention has been made by focusing on the problems of the above-mentioned conventional technology.It solves these problems, reduces costs by not requiring other parts, and does not require high processing accuracy. To provide a method for fixing a plate-shaped member which can be applied to narrow places, can be practiced over a wide range without producing a protruding part after fixing, and has less rattling.

[Summary of the invention]

In order to achieve this object, the present invention superimposes a second plate-like member capable of plastic deformation on a first plate-like member having a through hole, and from above the second plate-like member, The method is characterized in that the material of the second plate-like member is pushed and fixed into the through-hole of the first plate-like member using a punch having a diameter smaller than the diameter of the through-hole.

By using this method, other parts are not required for fixing, which reduces costs, does not require much processing precision, can be used in narrow spaces, does not produce protruding parts after fixing, and is highly effective. The occurrence can also be reduced.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8.

FIG. 1 is a perspective view showing an example of a superposed state of specific parts in which the invention is to be carried out, and in the figure, 10 is a first part made of metal, 11 is a second part, and this first part is 10 and the second part 11 are overlapped at the fixing part 12.
12.

This work procedure will be explained with reference to FIGS. 2 to 4. In the figures, 13 is a first plate-shaped member that becomes a fixed part of the first part 10, and 14 is a second plate-shaped member that becomes a fixed part of the second part. It is a member. A through hole 15 is previously formed in the first plate member 13 by a press or the like.
The cross-sectional shape of the plate varies greatly depending on the clearance between the gouly plate and the punch for punching and the material used, but as a general rule, from the punching direction, the deflection surface A is about 10% of the plate thickness. Next, the shear plane B has a relatively smooth straight surface with a thickness of approximately 30 to 4 mm.
0%, and finally, the fracture surface C is slightly tapered and the surface is rough, resulting in approximately 50 to 60% of the plate thickness.

A second plate member 14 that can be plastically deformed is superimposed on the first plate member 13 in which the through holes 15 are formed, and a die plate 16 as a pedestal is placed below the first plate member 13. Deploy. In this state, the fixing part 12 is
The second plate member 14 is punched with the punch 17. Through this operation, the through hole 15 of the first plate member 13 is press-fitted with the material of the second plate member 14. The amount of material to be press-fitted is 1
A punch hole 18 formed in the second plate member 14 by 7
has the same volume as Here, the through hole 1 of the first plate member 13
Since the fracture surface C of 5 is tapered, it bites into the material of the second plate member 14 when it is press-fitted, and a good fixing state can be obtained. In this embodiment, the punch 17 is punched halfway through the hole 15, but the same effect can be obtained even if the punch 17 is completely penetrated through the hole 15.

Also, FIG. 5 shows a second embodiment of the present invention, in which a through hole of the first plate member 13 is formed in a gouly plate 16a disposed on the lower surface of the first plate member 13. A conical protrusion 19 is provided at a position corresponding to 15.
9 makes it possible to press the material of the second plate member 14 more strongly against the fractured surface C of the through hole 15, thereby increasing the fixing strength.

Furthermore, what is shown in FIG. 6 is a third embodiment of the present invention,
In this case, a tapered portion 20 is formed at the lower end opening edge of the through hole 15a of the first plate member 13a;
The material of the second plate member 14 is rotated around the 0, thereby increasing the fixing strength.

FIG. 7 shows a fourth embodiment of the present invention, in which there is a dimensional margin on the outside of the first plate member 13, and the second plate member 13 The material of the shaped member 14 is intentionally bulged out from the through hole 15 to form the built-up portion 21,
The built-up portion 21 is designed to provide stronger fixing force.

Furthermore, FIG. 8 shows a fifth embodiment of the present invention. In this case, the through hole 15 of the first plate member 13 is formed in a gouly plate 16b arranged on the lower surface of the first plate member 13. Conical protrusions 19a are provided around the periphery, and this protrusion 1
9a and 19a also push the material of the first plate member 13 in the direction of the through hole 15, thereby increasing the fixing strength.

〔Effect of the invention〕

As described above, according to the present invention, since the shape of the through hole formed by a press or the like is used for fixation, no other parts are required, reducing costs.
Even if the punching position of the punch and the through hole are slightly misaligned, it will only result in uneven thickness, and the effect on the fixing strength will be small, so machining accuracy will not be required as much. After fixing, there will be no protruding parts, so it will be easier to stack the plates. There is no change in the thickness of the plate-shaped member, which expands the range of uses, and can be carried out even in narrow spaces.Since the material of the first plate-shaped member itself is directly press-fitted and fixed, there is little chance of rattling.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view showing the stacked state of specific parts for implementing the present invention, Fig. 2 is a sectional view showing the first embodiment of the invention before work, and Fig. 3 is during the same work. cross-sectional view, 4th
The figure is a sectional view of the fixed state after the work is completed, Figure 5 is a sectional view of the second embodiment during work, and Figure 6 is a sectional view of the third embodiment in the fixed state after the work is completed. 7 is a cross-sectional view of the fourth embodiment in a fixed state after work is completed, FIG. 8 is a cross-sectional view of the fifth embodiment during work, and FIG. 9 is a cross-sectional view of the conventional example in a fixed state. FIG. 10 is a sectional view showing another conventional example in a fixed state. 13, 13a...First plate member 14...Second plate member 15 fist 15a...Through hole 17
...Ponchi Figure 1

Claims (1)

[Claims] A second plate-like member capable of plastic deformation is superimposed on the first plate-like member in which a through-hole is formed, and a punch having a diameter smaller than the diameter of the through-hole is used from above the second plate-like member. A method for fixing a plate-shaped member, comprising pushing and fixing a material of a second plate-shaped member into a through hole of the first plate-shaped member.