JPS61147927A - Method and equipment for working case - Google Patents

Abstract

PURPOSE:To work the case having a flange in short time at lower cost by forming in order the stepped part, flange, the upper and lower faces and both side faces with bending along the bending line of a plate body and by fixing the lapped part of the stepped part. CONSTITUTION:A stepped part 3 is formed by bending a piece of a plate body 1 along the bending line 3a parallel to the long side 1b and a flange 2 is formed by bending further along the bending line 2a parallel to the short side 1a. The upper face 41 is then formed by bending along the bending line 41a parallel to the long side 1b. The lower face 42 and both side faces 43, 44 are formed by bending along the bending line 42a parallel to the long side 1b with the shape bending equipment of the case consisting of the cantilever type punch to provide a spacer and the recessed type die to provide an elastic member on the bottom part. The case is obtd. by fixing the lapped part of the stepped part 3 with spot welding, etc. thereafter.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method and apparatus for processing a case.

[Prior Art J] For example, some cases for electronic devices are designed so that a chassis to which an internal mechanism is attached can be freely attached to the case.

In this case, the case is provided with a locking means so that the chassis does not move when the chassis is attached to the electronic device case.

Further, when the front surface of the case serves as a display section or an operation section, a panel frame having a flange section may be attached to the front surface of the case in order to improve the appearance.

Conventionally, as shown in Figure The attachment was made by spot welding the parts.

In addition, as for the processing method of the case, see Fig. 7 (a) and (b).
As shown in the figure, a V-shaped punch 14 held on both sides and a die 15 having seven grooves were used to sequentially bend the plate body 16 to form a box-shaped case.

[Problems to be solved by the invention] However, in the conventional case processing method, there are many component parts of the case, and as a result, there are many spot welding parts.
The disadvantages are that the machining time is long and the machining cost is high.

Therefore, the first invention, a case processing method, aims to reduce the number of case components and spot welding points by bending a single plate, thereby shortening processing time and reducing processing costs. do.

In addition, when processing the case, conventionally the case is bent into a box shape using a double-sided V-shaped punch and die. It gets tangled and is difficult to remove.
The case was distorted, there were many bends, and workability was poor.

Therefore, the second invention is a case processing device.

Use a cantilever-shaped punch, and when bending the plate, make sure that the tip of the punch does not bend vertically or horizontally, and when pulling up the bent plate,
The purpose is to prevent galling from occurring on the plate.

[Means for solving the problem] For this reason, the case processing method of wSl's invention involves forming a bend line that forms a flange on the front of the case on one plate, and a part of the plate that overlaps when the case is assembled. and a bending line that forms a stepped part for fastening.

Assuming a bending line for configuring the surface of the case, the plate body is bent along a bending line forming the stepped part to form the stepped part, and a bending line forming the flange is formed. the plate body is bent along the bending line to form the flange, the plate body is bent along the bending line to form the surface of the case to form the surface of the case, and the overlapped portion of the stepped portion It is characterized by processing the case by fixing it.

Further, the case processing device of the second invention is a mold surface processing machine that bends and processes a single plate, and includes a cantilever-shaped punch, a concave die, and the punch. A spacer is provided to be removably interposed between the punch and the die surface finishing machine body, and an elastic member is provided at the bottom of the concave die. It is characterized by

[Embodiments] Hereinafter, embodiments of the case processing method of the first invention and the case processing apparatus of the second invention will be described based on the drawings, taking a case of an electronic device as an example.

FIGS. 1(a) to 1(f) are process diagrams for explaining the case processing method according to the first invention.

In Fig. 1(a), 1 is a single rectangular plate, and a bending line 2a for forming a flange 2 on the front of the case is made parallel to the short side 1a of the plate l. , formed at a distance inward from the short side 1a by the length of the flange,
In addition, when assembling the case, a bending line 3a for forming a stepped portion 3 for overlapping and fixing a part of the plate body is placed on the plate body 1.
is formed parallel to the long side tb of the case and spaced inward from the long side 1b by the length of overlapping the plates 1, and furthermore, the top surface 41. of the case is formed parallel to the long side tb of the case. Lower surface 42. Left side 43. Bending lines 41a and 42a for forming the right side surface 44 are formed parallel to the long side 1b, separated by a predetermined length.

These bending lines 2a, 3a, 41a, and 42a are imaginary lines to determine the bending position for bending one sheet of plate 1, and are not necessarily drawn by scribing or the like.

This plate l has character-shaped notches 5a and 5b formed at locations that constitute the upper surface 41 and lower surface 42 of the case when bent.

These notches 5a and 5b are formed to provide a case mounting bracket for attaching the case to a panel, etc., and as shown in the partially enlarged view of FIG.
A and 5b are further bent into a hook shape.

Note that there is a notch in the upper left part of plate 1, but this is a cutout of the part that will become the flange part of the overlapping part of plate 1, and it is difficult to further bend the overlapping part as a flange. This is why it is provided.

The plate 1 thus formed is first bent into a piece shape along the bending line 3a forming the stepped portion 3, as shown in FIG.
It is folded along a. Moreover, this folding order may be reversed.

After that, as shown in FIG. 1(C), the L side 41 of the case is
It is bent along the bending line 41a for configuring.

All of the bends are at right angles and are performed using a well known die bending machine.

The plate body 1 that has been bent up to this point is processed by a case processing device according to the second invention, which will be described later, to form the lower surface 42. as shown in FIG. 1(d). Left side 43. It is bent into a box shape along a bending line 42a to form a right side surface 44.

Of the upper surface 41 of the plate 1 bent into a box shape, the portion forming the stepped portion 3 is the overlapped portion as shown in FIG. are fixed by spot welding etc.

The plate 1, which is fixed and formed into a box shape, is completed as a case for an electronic device, as shown in FIG. 1(f).
- Next, a case processing device, which is the second invention, used in the process shown in FIG. 1(d) will be explained.

FIG. 3 (JL) is a partially sectional explanatory diagram showing a case processing device according to the second invention.

In FIG. 3(a), reference numeral 6 denotes a die bending machine body, and a punch 7 is supported on this die bending machine body 6. This support has a so-called cantilever shape that fixes one end 7a of the punch 7 and the mold bending machine main body 6 with a certain gap, and connects the support material 8 and the mold bending machine via the support material 8. The processing machine main body 6 is fixed with bolts 81, and the support member 8 and punch 7 are
This is done by fixing it with a port 82.

The cross section of this punch 7 is, for example, as shown in FIG. 3(b), with a convex shape having a concave portion 71 at the bottom and a notch 72 at the side to improve the shape of the material and to ensure accurate bending. I am learning to do well.

Further, a die 9 that is paired with the punch 7 to bend the plate 1 is installed below the punch 7, and its cross section is approximately concave. An elastic member 91 such as a coil spring is installed on the bottom 9a of the generally concave die 9, and a support base 92 is installed on the elastic member 91. Note that a rubber material may be used instead of the elastic member 91 and the support base 92.

A plurality of elastic members 91 are arranged along the depth of the die 9 so that the support base 92 can move up and down on average without being biased upward or downward.

Furthermore, the corners 9b of the concave die 9 are rounded and rounded, in order to squeeze the material well and to avoid damaging the outer surface of the case.

Also, a groove 9c is formed in a part of the concave die 9 in a direction perpendicular to the axis.
is formed, but this is because the flange 2 of the plate l is in the groove 9.
When the plate 1 is placed on the die 9 so that the plate 1 is depressed in the direction C, the plate 1 is made horizontal to prevent the flange from burring when bent.

The process of forming the plate 1 into a box shape using the mold bending machine configured as described above will be explained based on the operational diagrams shown in FIGS. 4(&) to 4(C).

Fig. 4(&) is a cross-sectional view of the plate 1 placed on the die 9, the punch 7 lowered and in contact with the plate 1, and Fig. 4(b) is a sectional view of the plate 1 with the punch 7 further lowered. FIG. 4(C) is a cross-sectional view showing how plate 1 is gradually bent, and FIG. 4(C) is a cross-sectional view when the plate is completely bent at right angles.

First, the plate l that has been processed up to the step shown in FIG.
A spacer 10 is interposed between them.

This spacer 10 is provided to prevent the punch 7 from bending upward when bending the plate l because the punch 7 has a cantilever type. As shown in the figure, it is preferable that the cross section of the spacer IO is H-shaped to prevent it from deflecting back and forth during processing, but it may also be simply rectangular.

After this spacer lO is inserted, the punch 7 is gradually lowered downward as shown in FIG. 4(&), and the punch 7 is brought into contact with the plate l.

As the punch 7 is further lowered as shown in FIG. 4(b), the plate 1 gradually becomes bent at a right angle.

When the punch 7 is completely lowered, the elastic member 91 installed at the bottom 9a of the substantially concave die 9 is sufficiently compressed, and the plate 1 is bent in the right angle direction, as shown in FIG. 4(C). Can be folded into a box shape.

When the punch 7 is then pulled upward, the bent plate l is automatically pushed upward by the support base 92 and the elastic member 91, and as the punch 7 is pulled up, the plate l is also pulled up.

Thereafter, the spacer 10 interposed between the die bending machine body 1 and the punch 7 is removed, and the plate l bent into a box shape is pulled out from the punch 7.

Through this process, a box-shaped case is fabricated from a single plate.

Note that this processing device can be used not only for processing cases but also for bending them into U-shapes.

[Effects of the Invention] As explained above, according to the case processing method according to the first invention, a case for an electronic device is processed from a single plate, which is faster than the conventional processing method. The number of component parts of the case is reduced, the number of spot welds is reduced, and processing time and processing costs can be reduced.

Further, according to the processing device for an electronic device case according to the second invention, since a cantilever-shaped punch and a removable spacer are provided on the punch, by removing the spacer, the box-like shape after processing is provided. The case can be easily pulled out, and there is no risk of distorting the case.
Furthermore, the spacer interposed between the die bending machine body and the punch prevents the punch from bending upward during bending of the plate.

In addition, due to the elastic member installed at the bottom of the approximately concave die,
Since a force is automatically applied to push the completely bent plate upward, the plate does not get jammed when pulled up with a punch.

[Brief explanation of the drawing]

Fig. 1(a) to Fig. 1(f) are process diagrams showing the method of processing the case of the first invention, Fig. 2 is a partial enlarged view of the cut portion, and Fig. 3(a), (b). 4(a) to 4(C) are partial cross-sectional explanatory views showing the case processing device of the second invention, and FIGS.
) is a diagram of the case folding operation performed by the case processing apparatus of the second invention, FIG. 5 is a configuration explanatory diagram showing another embodiment, and FIGS. 6 and 7 are configuration explanatory diagrams showing a conventional example. l... Plate, 2... Flange, 3...
...Stepped portion, 41a, 42a...Bending line, 6...Mold bending machine body, 7...
Punch, 9...Die, 91...Elastic member, 10...Spacer. Patent applicant Chino Seisakusho Co., Ltd. Representative Patent attorney Norihiro Nishimura Figure 5

Claims (2)

[Claims] (1) A bending line that forms a flange on the front of the case on one plate, a bending line that forms a stepped part for overlapping and fixing a part of the plate when the case is assembled, and the surface of the case. Assuming a bending line for forming the stepped part, the plate body is bent along the bending line forming the stepped part to form the stepped part, and the plate body is bent along the bending line forming the flange. The plate is bent to form the flange, the plate is bent along the bending line to form the surface of the case to form the surface of the case, and the overlapped portions of the stepped portions are fixed. How to process the case by processing the case. (2) A die-bending machine that bends a single plate to form a case includes a cantilever-shaped punch, a concave die, and a die-bending machine body that supports the punch. ,
A case processing device, characterized in that a spacer is provided to be removably interposed between the punch and the die bending machine body, and an elastic member is provided at the bottom of the concave die.