JPS5892299A - Method of machining sheathing case for electric equipment or the like - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of processing an exterior case for electrical equipment, which allows a sharp edge to be formed on the outside of a bent portion.

When processing the exterior case of an electric + Ik device, etc., it is important to finish the outer surface of the bent S (part of the corner) of the exterior case as sharply as possible, from iron black to make the exterior case look *m. There are some things that must happen. However, with the currently provided processing method for this external case, it is difficult to finish the outer surface of the bent part sharply, and even if there is a processing method that can finish the outer surface sharply, there are other problems. The reality is that there are drawbacks.

For example, press working is a common method for processing the exterior case, but the conventional press working has the disadvantage that the outside of the bent portion cannot be formed sharply. 1st
Figure (Xu, (1)) is a diagram showing a conventional method of forming a folded corridor in a plate-shaped body when processing an exterior case by press working. In these figures, 1 is the upper mold of the press machine, 2 is the lower mold, and 3 is gold llI4#! It is a plate-like body. The upper die 1 has a protrusion s4 with a chevron-shaped cross section, and the lower die 2 has a recess s5 with a V-shaped cross section into which the protrusion 4 is fitted. The protrusion 4 of the upper mold 1 has both left and right surfaces 5m and 5b, which are flat surfaces, on which the plate-shaped body 3 is bent.
The intersection of these surfaces 6a and 6b forms a sharp edge 7. Further, the recess 5 of the lower mold 2 has left and right flat surfaces 8a,
8b, and the portion where the surfaces 8m and 8b intersect is a continuous portion 9. The processing method shown in FIG. As shown in the figure, the plate-shaped body 3 is bent by tightening the upper die 1 and the lower die 2. However, in this method, the plate-shaped body 3 is bent by tightening the upper die 1 and the lower die 2. In this case, the outer surface of the bent portion 10 formed on the plate-shaped body 3 is not sharp, and the outer surface thereof is rounded as shown in the figure.

Examples of processing methods that can sharpen the outside of the bent portion include cold forging, extrusion processing, die casting processing, and the like. However, Reiseki Yuzo has the disadvantage that it can only manufacture small products due to the capacity of the press machine and mold, and in extrusion processing, it has the disadvantage that it is not possible to reduce the thickness of the product due to the strength of the extrusion mold. The disadvantage is that only 100% of products can be manufactured. Furthermore, die-casting requires a large-scale mold and has the disadvantage that the additives added to improve the fluidity of the material make the product look dirty.

This invention was made in response to the above-mentioned sentiment, and it is possible to form the outer surface of the bent part into a sharp point in press processing that does not have the drawbacks of the above-mentioned cold forging, extrusion processing, die casting processing, etc. The object of the present invention is to provide a method for processing an exterior case of an electric alt device or the like.

In order to achieve this object, the present invention provides a protrusion on the ridge-decoration of one of the molds for processing the inner ring of the bent portion of the plate-shaped body,
This protrusion is inserted into the plate-shaped body, the inside of the bent part of the plate-shaped body is pushed out, and the extruded meat is pressed around the grooved part of the other mold. ing.

The present invention will be explained in detail below.

This invention is a method of obtaining an exterior case by bending a metal plate-shaped body by press working, and when bending the plate-shaped body, the outside of the bent portion formed on the plate-shaped body is sharpened. This is a method that can be formed.

When carrying out this invention, for example, FIG.
A press machine having a mold as shown in b) is used.

The mold shown in Figures 2 (1) and (b) differs from the mold shown in Figure 1 (Xun, (b)) only in that the upper mold has a protrusion. has the same configuration as the o mold in Figs. 1(a) and (b).In other words, the upper mold 1 shown in Fig. 2 has this ridge at #il$7 where the protrusion s40 surfaces 6a and 6b intersect. ks
A protrusion 11 that protrudes downward from 7 is formed. This protrusion @11 is formed over the entire area of the edge 7, and its protrusion length 11 (t) is determined depending on the thickness of the plate-shaped body 3 to be processed.

The procedure for bending the plate-shaped body 3 is shown in Figures 1 (a) and (b).
First, as shown in Fig. 2(a) K, the upper mold 1 is
The plate-shaped body 3 is rearranged between the upper die 1 and the lower die 2, and then the upper die 1 and the lower die 2 are tightened, and the plate-shaped body 3 is bent as shown in FIG. 2(b). In this case, the plate-like body 3 is bent along the upper ml surfaces 6&, 6b and the lower W2 fii s a s s b. In this bending process, the protrusions 11 of the upper die 1 are inserted into the inner surface of the plate-like body 3 as shown in FIG. 812 and extrude the volume corresponding to the recessed part 2 of the plate-shaped body 3 downward and press it around the groove 9 of the lower die 2. Therefore, the bent portion 10 of the plate-shaped body 3 obtained here
The shape of the edge 5sta formed on the outside thereof is a sharp shape that follows the contour of the concave s5 of the lower mold 2.

In this invention, an exterior case is obtained by bending a plate-like body as described above. Therefore, the obtained exterior case has a sharp edge on the outside of the bent portion, and has an excellent appearance.

Figure 4 is a diagram showing another example of a mold used for carrying out the present invention. The mold shown in this figure is upper g1 (0 side 6
A bar 14 is formed at the intersection of 1.6b, and a rod 15 with a circular cross section is fitted and fixed to this cage 14, and this bar 15 is used as a protrusion.

Even when the outer case is processed using the mold shown here, the same functions and effects as those shown in FIGS. 92(1) and 92(b) can be obtained.

In addition, the above-mentioned plate-shaped body has I/c1! so that the thickness of the part that becomes the bending part is well deformed along the periphery of the groove S of the mold.
It is desirable to use a metal material that has high abrasiveness and abrasiveness.

As explained above, the present invention is a method of obtaining an exterior case by newly bending a plate-like body into upper and lower layers, and in which the ridge line *J (protrusion) of one mold is processed on the inside of the folded part of the plate-like body. A strip is provided, and this protruding strip is inserted into the plate-shaped body, and the meat of the bent part of the rice-shaped body is extruded outward, and the extruded meat is placed around the groove of the other mold. Therefore, according to this method, when the fold 1s is formed on the plate-shaped body, the outer flesh of the diffraction curve is forcibly formed into the shape of the above-mentioned #Ip multiplied by m. A sharp ridge on the outside of the curved part?k
There is an advantage that AS can be formed.

[Brief explanation of drawings]

Figures 1 (a) and (b) are explanatory diagrams showing the conventional method of bending a plate-shaped body, and Figures N42 (a), (b) and Figure 3 are diagrams showing how to process an exterior case according to the present invention. FIG. 4 is an explanatory diagram showing a method of bending a plate-shaped body, and is a schematic configuration diagram showing another example of a mold used in carrying out the present invention. 1. Upper mold, 2. Bent lower mold, 3. Plate-shaped body,
7...ridge line section, 9. curved groove section, 10. bend section,
11... Projection part, 13...Ridge part, 15・-11 (Protrusion S
). Applicant: Japanese Manufacturer Co., Ltd. Figure 2: 3゜, 1: 67 "5 Riddles" Z Danshichi'sb Go = [ko7
“7teni Figure 9

Claims (1)

[Claims] (1) A plate-like body made of gold 1 is placed between an upper mold and a lower mold, and the plate-like body is bent by tightening the upper mold and the lower mold. In a method for processing an exterior case for electrical equipment, in which a molded product is obtained using
s into the plate-shaped body, push out the inside of the bent portion of the plate-shaped body outward, and press the extruded meat around the other mold of the plate-shaped body. A method of processing an exterior case for electrical equipment, etc., in which 4**k is formed on the outside of the bent part formed in the mold. (1) A method for processing an exterior case of an electric vehicle *a, etc. described in JR, characterized in that it is integrally formed. 2. A method for processing an outer scissor case for electrical equipment, etc., as set forth in claim 1, wherein the case is fixed.