JPS5976624A - Working method of plate working product having bent part - Google Patents

Abstract

PURPOSE:To form a bent part with good accuracy by inscribing a groove part having a prescribed depth by a marking tool in the position of a blank flat plate in a holding state corresponding to the bent part and bending the plate. CONSTITUTION:A blank flat plate A formed with a blanked part 1 and a notched part 2 is held by means of clamps 11a, 11b of a frame body 11. The position of the plate A corresponding to the bent part is inscribed with a V- groove 10 at the depth of <=1/2 of the thickness of the plate A by a projecting line 12 of a marking tool consisting of a male tool 13 projected with the line 12 having a V section and a female tool 14 consisting of only the plane part. The V-groove 10 is then bent, whereby the plate working product having the exactly bent part is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing sheet metal products, particularly box-shaped sheet metal products.

Parts such as metal frames and exterior cases of instruments and equipment are manufactured from sheet materials, and many have perforated and bent parts.

When such products (components) are mass produced, they are manufactured by a combination of punching and bending using press working. On the other hand, for items that are produced as prototypes,
The hole-machined portion is processed by drilling or punching, and the bending process is performed at a predetermined position using a bending machine such as a brake press. In this case, a method is adopted in which a scribing line is provided in advance at the bending position and the bending process is performed along the kneading line.

For example, when manufacturing a box-shaped I)/l not shown in Fig. 1, on the flat plate of fabric (A+) shown in Fig.
, (11. Notch part (2) and bent part (3) are marked with a marking line, and punched parts ill, fi+ and notch part t21, +2 are drawn along the marking line.
1 is processed as described above, and further processed (sanded, etc.) to the shape according to the marking lines, and a blank (B) is made.
l(!l:L, then each fold i along the marking line
l((31) may be bent in a predetermined direction. This completes a box with a predetermined shape.

The above processing method is suitable for single-piece production of small items, such as blanks or items with a square size of 20 to 30' cm, but it is suitable for production of small items such as blanks or items of 20 to 30 cm square. production volume).

This is due to the fact that in the case of 1iiJ Nagisa's large products, the dimensional accuracy of the marking lines is not sufficient in terms of perpendicularity and parallelism, and it is difficult to achieve accuracy in long dimensions. In the case of the latter H1 production, the cause is that the amount of work involved in each work including scribing work is extremely large.

Among these, the IJfJ punching process and notch process can be applied to the above-mentioned small or medium volume production by using an NC type punching machine.

This punching machine has a tool storage and supply section equipped with various punches and dies, and the frame body that holds the dough flat plate or the machine moves sequentially to predetermined positions by a computer and stops, and then repeats the process at the stop position. This is a type of punching or 17J notch processing that is performed using punches and dies supplied from the tool storage and supply department according to instructions from a computer, and if the program is repeatedly executed, small-scale production of about 17J is possible. It is possible.

However, even in this case, the only way to perform the bending process is to use a brake press (bending plate). Conventionally, the bending position is determined using a backing plate (4), and the third
Either the folding method is as shown in the figure, or the bending position is indicated by a marking line in the same manner as described above, and the folding is done accordingly.

When adding this marking line, it is difficult to match it with the male marking line of the bending machine because the marking line is K<< and has a shallow scratch-like appearance. In addition, there is a drawback that the dimensional accuracy of the folding is insufficient because it is difficult to obtain the precision of the marking line, and on the other hand, the method using a backing plate also causes variations in the bending position dimensions due to unevenness in the degree of contact at the edge of the plate. big.

All of these problems are caused by the fact that the display position of the folded portion and the male die (5) of the folding machine do not exactly match.

An object of the present invention is to display the bending position so that it is positive (11t) with respect to other processing parts, and that the male die of the bending machine and the bending position correspond to positive (01g).

Raikou Nano's technical means to solve the above problem is to hold a flat plate of fabric in a predetermined area and then flatten the fabric.
(2) move and stop the machine and select the tool to be used at the stop position; (1) equip the N'C type punching base with a stamping tool for stamping a linear groove; In the holding state of the dough flat plate, grooves with a depth of 1/2 or less of the dough flat plate are carved at both ends or the entire area of the position corresponding to the folded part using the stamping tool, and either punching or notching is performed. After completing one or both of the processes, the tip of the male die of the bending machine is engaged with the groove to perform the bending process.

According to the above technical means, the bending position is displayed by the NC punching machine together with punching and notching, so that the dimensional accuracy of the chest relative to other punching centers, etc. is equal to the sleeve accuracy of the punching machine (5 /100 to 1/10). In addition, since the bending part is indicated as a groove, it will match the tip of the male die before bending in a secured state, so that the male die and the bending part will accurately match during the bending process. do.

The present invention has the following unique effects.

Since the groove is formed in the bent portion, the minimum radius of the bent portion can be set small. Therefore, the elongation of the plate material at the bending portion is reduced, and dimensional variations caused by the bending itself are also reduced.

Since the first part engages with the male die of the bending plate, alignment during bending is quick and the speed of bending can be increased.

When folding, is the folding machine male type? Even if the tip of the male die is slightly misaligned, the tip of the male die may be guided into the groove in the initial stage of bending, and even if the alignment during the bending process is rough, it will not be possible to make accurate bends. can.

Hereinafter, details of embodiments of the present invention will be further explained based on the drawings.

In the example of Kori J, the processing (work) procedure is not much different from the conventional single-piece production, and V☆iff tlUl, which corresponds to the groove, is carved on the bent part using an NC punching plate over the entire area of the bent part. It is recommended to set it.

The work of stamping this V end (Ill (I)) may be done at any time after the punching work, but it is usually done after the punching and notch work is completed in consideration of the notch (2), etc. This V groove (10) is used to store and supply the punching machine's tools (T).
It is engraved using the engraved tool shown in FIG.

This stamping tool consists of a male tool d3) having a protruding strip (12) with a cross section of ■ and a female tool 041 consisting of only a flat surface. )
If the tool is made to travel the same length in the direction of the bending line, and the male and female tools No. 111 are operated in a stopped state, a continuous V tR (Ill) will be engraved.

In addition, when carving this V groove, it must be carved on either the front or back of the flat plate of dough depending on the bending direction, but with the above NC type punching machine, the male tool 0 is used.
3) Since both of the female tools (14) can be held by both tool holding parts below 1, the front and back sides can be held until the frame (11) holds the dough flat plate (A) (or blank CB). V-grooves (101) can be carved on any slope. That is, when V-grooves (10) are carved on the front side, as shown in Fig. 5,
The upper tool holder t-1 part holds the male tool (131), and when engraving is done upside down, the male tool (13) is held in the lower tool holder.
All you have to do is keep it. Therefore, in order to manufacture the product shown in Fig. 1, when punching is performed as shown in Fig. 4, +j of "1"
A V-groove (curved V-groove) will be carved on the surface side of the flat plate (A) (or clamp (B)) of the dough using the method of Mr. Ij.

To bend the blank produced by the above procedure (after processing such as punching) using a bending machine, insert a V-groove into the tip of the Mt type (5) of the bending machine, as shown in Figure 6. If they are engaged and then operated in the 417 bending process, the bending process is completed.

The V grooves (10) may be provided only at both ends of the bent portion. When aligning the folded ends, it is sufficient that both ends match the positive shape (IIF) and the male shape (5), and during this alignment, the dough flat plate is bent slightly over medium heat. , It is easy to align the GO+ and the male mold (5).

Note that the ■groove (10) may have a U-shaped cross section, but when it is a ■groove, the workability is good. 1, Groove I/i
It goes without saying that by setting the attachment angle 'ff of the male tool, it is possible to engrave at any angle, such as in a diagonal direction.

Furthermore, if the protruding line 021 of the male tool (13) of the marking tool is made into a cross shape as shown in Fig. 7, a cross-shaped V groove is carved by aligning the center at a predetermined position, and then the notch is cut out. .

If the method of cutting is adopted, the part where the bending capitals intersect at right angles (V of the corner notch capitals (21, i21') in Figure 4)
Grooves can be carved at the same time.

Next, Kinoi IJ (i, j: It can also be used for mass production of small parts.

For example, in the case of a small part with a shape as shown in Fig. 8 (21+1), a clamp is formed (2υ is included, and a V groove is carved in the bent part using the method described above) at the same time as punching as shown in Fig. 9. Then, after bending it to match the V groove (10) as shown in Fig. 8, the clamping +211 f!: 9J cutting is completed to complete many small parts DO+ at once.Here, the clamping (2t+) It goes without saying that the method of providing ' can also be adopted in the embodiments described above.

It will be even more convenient to use a folding machine equipped with the following new device. That is, a sensor is provided to detect the groove carved in the bent part, and the output of the bottom sensor and the position signal 'i3 t '#J of the male mold (5) are inputted to the determination device t, and the determination device t determines the groove and the male mold. (5), and based on the output of the determination device, the material holding means is made to hold the dough (A).
) If you use a bending machine that holds the male die (5) in a fixed position, the groove will act as a gauge for the bending position, allowing you to perform accurate bending without the need for skill. This is possible, and it also eliminates the inconvenience of having to visually check the dimension display for alignment, which is the case with conventional NC-type bending machines.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a sheet metal box, Figure 2 is a blank diagram of this before bending, Figure 3 is diagram 9J of a conventional bending process,
FIG. 4 is a punch-out of an embodiment of the present invention. 5 is a perspective view of a tool for carving a V-groove, 6 is a diagram explaining the process of bending 11111=1, and 7 is a stamp used in other examples. Illustration of tools, No. 8
Fig. 9 is a diagram Fj-+ for the production of small/object parts, and in the figure (A)...... flat plate of dough (1)... punching part (2)... ...Kiribi fl< +51
・・・・・・Male mouth 0） ・・・ ・・・ ・・・ V Mizo Agent Patent Attorney Yoshihiro Sakagami Figure 4 Figure 3rA Figure 2 Figure 1

Claims (1)

[Claims] In the method of bending a part of a flat plate of dough that has been punched out to add a product, an upper thread r ( Select the tool to be used at the stop position and select the tool l!i
- An NC-type punching machine that is operated is equipped with a stamping tool for stamping a linear groove, and on both ends or the entire area of the position corresponding to the folded part when the dough flat plate is held [jη], A groove with a depth of less than 1/2 of the thickness of the flat plate of material is carved with a U marking tool, and after punching and notching or both are completed, a bending machine is inserted into the groove. A method for processing a sheet metal product having a bent part in which the tip of a male die is engaged and bent.